diff --git a/discord_rss_bot/custom_filters.py b/discord_rss_bot/custom_filters.py
index 7d8fe83..fd9461c 100644
--- a/discord_rss_bot/custom_filters.py
+++ b/discord_rss_bot/custom_filters.py
@@ -8,15 +8,11 @@ from discord_rss_bot.filter.blacklist import entry_should_be_skipped
 from discord_rss_bot.filter.blacklist import feed_has_blacklist_tags
 from discord_rss_bot.filter.whitelist import has_white_tags
 from discord_rss_bot.filter.whitelist import should_be_sent
-from discord_rss_bot.settings import get_reader
 
 if TYPE_CHECKING:
     from reader import Entry
     from reader import Reader
 
-# Our reader
-reader: Reader = get_reader()
-
 
 @lru_cache
 def encode_url(url_to_quote: str) -> str:
@@ -34,11 +30,12 @@ def encode_url(url_to_quote: str) -> str:
     return urllib.parse.quote(string=url_to_quote) if url_to_quote else ""
 
 
-def entry_is_whitelisted(entry_to_check: Entry) -> bool:
+def entry_is_whitelisted(entry_to_check: Entry, reader: Reader) -> bool:
     """Check if the entry is whitelisted.
 
     Args:
         entry_to_check: The feed to check.
+        reader: Custom Reader instance.
 
     Returns:
         bool: True if the feed is whitelisted, False otherwise.
@@ -47,11 +44,12 @@ def entry_is_whitelisted(entry_to_check: Entry) -> bool:
     return bool(has_white_tags(reader, entry_to_check.feed) and should_be_sent(reader, entry_to_check))
 
 
-def entry_is_blacklisted(entry_to_check: Entry) -> bool:
+def entry_is_blacklisted(entry_to_check: Entry, reader: Reader) -> bool:
     """Check if the entry is blacklisted.
 
     Args:
         entry_to_check: The feed to check.
+        reader: Custom Reader instance.
 
     Returns:
         bool: True if the feed is blacklisted, False otherwise.
diff --git a/discord_rss_bot/custom_message.py b/discord_rss_bot/custom_message.py
index b84b30f..1626e39 100644
--- a/discord_rss_bot/custom_message.py
+++ b/discord_rss_bot/custom_message.py
@@ -5,17 +5,18 @@ import json
 import logging
 import re
 from dataclasses import dataclass
+from typing import TYPE_CHECKING
 
 from bs4 import BeautifulSoup
 from bs4 import Tag
 from markdownify import markdownify
-from reader import Entry
-from reader import Feed
-from reader import Reader
-from reader import TagNotFoundError
 
 from discord_rss_bot.is_url_valid import is_url_valid
-from discord_rss_bot.settings import get_reader
+
+if TYPE_CHECKING:
+    from reader import Entry
+    from reader import Feed
+    from reader import Reader
 
 logger: logging.Logger = logging.getLogger(__name__)
 
@@ -116,18 +117,18 @@ def format_entry_html_for_discord(text: str) -> str:
     return _restore_discord_timestamp_tags(formatted_text, replacements)
 
 
-def replace_tags_in_text_message(entry: Entry) -> str:
+def replace_tags_in_text_message(entry: Entry, reader: Reader) -> str:
     """Replace tags in custom_message.
 
     Args:
         entry: The entry to get the tags from.
+        reader: Custom Reader instance.
 
     Returns:
         Returns the custom_message with the tags replaced.
     """
     feed: Feed = entry.feed
-    custom_reader: Reader = get_reader()
-    custom_message: str = get_custom_message(feed=feed, custom_reader=custom_reader)
+    custom_message: str = get_custom_message(feed=feed, reader=reader)
 
     content = ""
     if entry.content:
@@ -229,18 +230,18 @@ def get_first_image(summary: str | None, content: str | None) -> str:
     return ""
 
 
-def replace_tags_in_embed(feed: Feed, entry: Entry) -> CustomEmbed:
+def replace_tags_in_embed(feed: Feed, entry: Entry, reader: Reader) -> CustomEmbed:
     """Replace tags in embed.
 
     Args:
         feed: The feed to get the tags from.
         entry: The entry to get the tags from.
+        reader: Custom Reader instance.
 
     Returns:
         Returns the embed with the tags replaced.
     """
-    custom_reader: Reader = get_reader()
-    embed: CustomEmbed = get_embed(feed=feed, custom_reader=custom_reader)
+    embed: CustomEmbed = get_embed(feed=feed, reader=reader)
 
     content = ""
     if entry.content:
@@ -331,31 +332,29 @@ def _replace_embed_tags(embed: CustomEmbed, template: str, replace_with: str) ->
     embed.footer_icon_url = try_to_replace(embed.footer_icon_url, template, replace_with)
 
 
-def get_custom_message(custom_reader: Reader, feed: Feed) -> str:
+def get_custom_message(reader: Reader, feed: Feed) -> str:
     """Get custom_message tag from feed.
 
     Args:
-        custom_reader: What Reader to use.
+        reader: What Reader to use.
         feed: The feed to get the tag from.
 
     Returns:
         Returns the contents from the custom_message tag.
     """
     try:
-        custom_message: str = str(custom_reader.get_tag(feed, "custom_message"))
-    except TagNotFoundError:
-        custom_message = ""
+        custom_message: str = str(reader.get_tag(feed, "custom_message", ""))
     except ValueError:
         custom_message = ""
 
     return custom_message
 
 
-def save_embed(custom_reader: Reader, feed: Feed, embed: CustomEmbed) -> None:
+def save_embed(reader: Reader, feed: Feed, embed: CustomEmbed) -> None:
     """Set embed tag in feed.
 
     Args:
-        custom_reader: What Reader to use.
+        reader: What Reader to use.
         feed: The feed to set the tag in.
         embed: The embed to set.
     """
@@ -371,20 +370,20 @@ def save_embed(custom_reader: Reader, feed: Feed, embed: CustomEmbed) -> None:
         "footer_text": embed.footer_text,
         "footer_icon_url": embed.footer_icon_url,
     }
-    custom_reader.set_tag(feed, "embed", json.dumps(embed_dict))  # pyright: ignore[reportArgumentType]
+    reader.set_tag(feed, "embed", json.dumps(embed_dict))  # pyright: ignore[reportArgumentType]
 
 
-def get_embed(custom_reader: Reader, feed: Feed) -> CustomEmbed:
+def get_embed(reader: Reader, feed: Feed) -> CustomEmbed:
     """Get embed tag from feed.
 
     Args:
-        custom_reader: What Reader to use.
+        reader: What Reader to use.
         feed: The feed to get the tag from.
 
     Returns:
         Returns the contents from the embed tag.
     """
-    embed = custom_reader.get_tag(feed, "embed", "")
+    embed = reader.get_tag(feed, "embed", "")
 
     if embed:
         if not isinstance(embed, str):
diff --git a/discord_rss_bot/feeds.py b/discord_rss_bot/feeds.py
index 8e6ca63..5510516 100644
--- a/discord_rss_bot/feeds.py
+++ b/discord_rss_bot/feeds.py
@@ -23,7 +23,6 @@ from reader import FeedNotFoundError
 from reader import Reader
 from reader import ReaderError
 from reader import StorageError
-from reader import TagNotFoundError
 
 from discord_rss_bot.custom_message import CustomEmbed
 from discord_rss_bot.custom_message import get_custom_message
@@ -37,7 +36,6 @@ from discord_rss_bot.hoyolab_api import extract_post_id_from_hoyolab_url
 from discord_rss_bot.hoyolab_api import fetch_hoyolab_post
 from discord_rss_bot.hoyolab_api import is_c3kay_feed
 from discord_rss_bot.is_url_valid import is_url_valid
-from discord_rss_bot.missing_tags import add_missing_tags
 from discord_rss_bot.settings import default_custom_message
 from discord_rss_bot.settings import get_reader
 
@@ -98,26 +96,23 @@ def extract_domain(url: str) -> str:  # noqa: PLR0911
         return "Other"
 
 
-def send_entry_to_discord(entry: Entry, custom_reader: Reader | None = None) -> str | None:  # noqa: C901, PLR0912
+def send_entry_to_discord(entry: Entry, reader: Reader) -> str | None:  # noqa: C901
     """Send a single entry to Discord.
 
     Args:
         entry: The entry to send to Discord.
-        custom_reader: The reader to use. If None, the default reader will be used.
+        reader: The reader to use.
 
     Returns:
         str | None: The error message if there was an error, otherwise None.
     """
-    # Get the default reader if we didn't get a custom one.
-    reader: Reader = get_reader() if custom_reader is None else custom_reader
-
     # Get the webhook URL for the entry.
     webhook_url: str = str(reader.get_tag(entry.feed_url, "webhook", ""))
     if not webhook_url:
         return "No webhook URL found."
 
     # If https://discord.com/quests/<quest_id> is in the URL, send a separate message with the URL.
-    send_discord_quest_notification(entry, webhook_url)
+    send_discord_quest_notification(entry, webhook_url, reader=reader)
 
     # Check if this is a c3kay feed
     if is_c3kay_feed(entry.feed.url):
@@ -128,7 +123,7 @@ def send_entry_to_discord(entry: Entry, custom_reader: Reader | None = None) ->
                 post_data: dict[str, Any] | None = fetch_hoyolab_post(post_id)
                 if post_data:
                     webhook = create_hoyolab_webhook(webhook_url, entry, post_data)
-                    execute_webhook(webhook, entry)
+                    execute_webhook(webhook, entry, reader=reader)
                     return None
                 logger.warning(
                     "Failed to create Hoyolab webhook for feed %s, falling back to regular processing",
@@ -142,17 +137,14 @@ def send_entry_to_discord(entry: Entry, custom_reader: Reader | None = None) ->
     # Try to get the custom message for the feed. If the user has none, we will use the default message.
     # This has to be a string for some reason so don't change it to "not custom_message.get_custom_message()"
     if get_custom_message(reader, entry.feed) != "":  # noqa: PLC1901
-        webhook_message: str = replace_tags_in_text_message(entry=entry)
+        webhook_message: str = replace_tags_in_text_message(entry=entry, reader=reader)
 
     if not webhook_message:
         webhook_message = "No message found."
 
     # Create the webhook.
     try:
-        should_send_embed = bool(reader.get_tag(entry.feed, "should_send_embed"))
-    except TagNotFoundError:
-        logger.exception("No should_send_embed tag found for feed: %s", entry.feed.url)
-        should_send_embed = True
+        should_send_embed = bool(reader.get_tag(entry.feed, "should_send_embed", True))
     except StorageError:
         logger.exception("Error getting should_send_embed tag for feed: %s", entry.feed.url)
         should_send_embed = True
@@ -162,15 +154,15 @@ def send_entry_to_discord(entry: Entry, custom_reader: Reader | None = None) ->
         should_send_embed = False
 
     if should_send_embed:
-        webhook = create_embed_webhook(webhook_url, entry)
+        webhook = create_embed_webhook(webhook_url, entry, reader=reader)
     else:
         webhook: DiscordWebhook = DiscordWebhook(url=webhook_url, content=webhook_message, rate_limit_retry=True)
 
-    execute_webhook(webhook, entry)
+    execute_webhook(webhook, entry, reader=reader)
     return None
 
 
-def send_discord_quest_notification(entry: Entry, webhook_url: str) -> None:
+def send_discord_quest_notification(entry: Entry, webhook_url: str, reader: Reader) -> None:
     """Send a separate message to Discord if the entry is a quest notification."""
     quest_regex: re.Pattern[str] = re.compile(r"https://discord\.com/quests/\d+")
 
@@ -182,7 +174,7 @@ def send_discord_quest_notification(entry: Entry, webhook_url: str) -> None:
             content=quest_url,
             rate_limit_retry=True,
         )
-        execute_webhook(webhook, entry)
+        execute_webhook(webhook, entry, reader=reader)
 
     # Iterate through the content of the entry
     for content in entry.content:
@@ -240,12 +232,17 @@ def set_title(custom_embed: CustomEmbed, discord_embed: DiscordEmbed) -> None:
     discord_embed.set_title(embed_title) if embed_title else None
 
 
-def create_embed_webhook(webhook_url: str, entry: Entry) -> DiscordWebhook:  # noqa: C901
+def create_embed_webhook(  # noqa: C901
+    webhook_url: str,
+    entry: Entry,
+    reader: Reader,
+) -> DiscordWebhook:
     """Create a webhook with an embed.
 
     Args:
         webhook_url (str): The webhook URL.
         entry (Entry): The entry to send to Discord.
+        reader (Reader): The Reader instance to use for getting embed data.
 
     Returns:
         DiscordWebhook: The webhook with the embed.
@@ -254,7 +251,7 @@ def create_embed_webhook(webhook_url: str, entry: Entry) -> DiscordWebhook:  # n
     feed: Feed = entry.feed
 
     # Get the embed data from the database.
-    custom_embed: CustomEmbed = replace_tags_in_embed(feed=feed, entry=entry)
+    custom_embed: CustomEmbed = replace_tags_in_embed(feed=feed, entry=entry, reader=reader)
 
     discord_embed: DiscordEmbed = DiscordEmbed()
 
@@ -316,13 +313,14 @@ def get_webhook_url(reader: Reader, entry: Entry) -> str:
         str: The webhook URL.
     """
     try:
-        webhook_url: str = str(reader.get_tag(entry.feed_url, "webhook"))
-    except TagNotFoundError:
-        logger.exception("No webhook URL found for feed: %s", entry.feed.url)
-        return ""
+        webhook_url: str = str(reader.get_tag(entry.feed_url, "webhook", ""))
     except StorageError:
         logger.exception("Storage error getting webhook URL for feed: %s", entry.feed.url)
         return ""
+
+    if not webhook_url:
+        logger.error("No webhook URL found for feed: %s", entry.feed.url)
+        return ""
     return webhook_url
 
 
@@ -341,53 +339,53 @@ def set_entry_as_read(reader: Reader, entry: Entry) -> None:
         logger.exception("Error setting entry to read: %s", entry.id)
 
 
-def send_to_discord(custom_reader: Reader | None = None, feed: Feed | None = None, *, do_once: bool = False) -> None:  # noqa: C901, PLR0912
+def send_to_discord(reader: Reader | None = None, feed: Feed | None = None, *, do_once: bool = False) -> None:  # noqa: C901, PLR0912
     """Send entries to Discord.
 
     If response was not ok, we will log the error and mark the entry as unread, so it will be sent again next time.
 
     Args:
-        custom_reader: If we should use a custom reader instead of the default one.
+        reader: If we should use a custom reader instead of the default one.
         feed: The feed to send to Discord.
         do_once: If we should only send one entry. This is used in the test.
     """
     logger.info("Starting to send entries to Discord.")
     # Get the default reader if we didn't get a custom one.
-    reader: Reader = get_reader() if custom_reader is None else custom_reader
+    effective_reader: Reader = get_reader() if reader is None else reader
 
     # Check for new entries for every feed.
-    reader.update_feeds(
+    effective_reader.update_feeds(
         scheduled=True,
         workers=os.cpu_count() or 1,
     )
 
     # Loop through the unread entries.
-    entries: Iterable[Entry] = reader.get_entries(feed=feed, read=False)
+    entries: Iterable[Entry] = effective_reader.get_entries(feed=feed, read=False)
     for entry in entries:
-        set_entry_as_read(reader, entry)
+        set_entry_as_read(effective_reader, entry)
 
         if entry.added < datetime.datetime.now(tz=entry.added.tzinfo) - datetime.timedelta(days=1):
             logger.info("Entry is older than 24 hours: %s from %s", entry.id, entry.feed.url)
             continue
 
-        webhook_url: str = get_webhook_url(reader, entry)
+        webhook_url: str = get_webhook_url(effective_reader, entry)
         if not webhook_url:
             logger.info("No webhook URL found for feed: %s", entry.feed.url)
             continue
 
-        should_send_embed: bool = should_send_embed_check(reader, entry)
+        should_send_embed: bool = should_send_embed_check(effective_reader, entry)
 
         # Youtube feeds only need to send the link
         if is_youtube_feed(entry.feed.url):
             should_send_embed = False
 
         if should_send_embed:
-            webhook = create_embed_webhook(webhook_url, entry)
+            webhook = create_embed_webhook(webhook_url, entry, reader=effective_reader)
         else:
             # If the user has set the custom message to an empty string, we will use the default message, otherwise we
             # will use the custom message.
-            if get_custom_message(reader, entry.feed) != "":  # noqa: PLC1901
-                webhook_message = replace_tags_in_text_message(entry)
+            if get_custom_message(effective_reader, entry.feed) != "":  # noqa: PLC1901
+                webhook_message = replace_tags_in_text_message(entry, reader=effective_reader)
             else:
                 webhook_message: str = str(default_custom_message)
 
@@ -397,12 +395,12 @@ def send_to_discord(custom_reader: Reader | None = None, feed: Feed | None = Non
             webhook: DiscordWebhook = DiscordWebhook(url=webhook_url, content=webhook_message, rate_limit_retry=True)
 
         # Check if the entry is blacklisted, and if it is, we will skip it.
-        if entry_should_be_skipped(reader, entry):
+        if entry_should_be_skipped(effective_reader, entry):
             logger.info("Entry was blacklisted: %s", entry.id)
             continue
 
         # Check if the feed has a whitelist, and if it does, check if the entry is whitelisted.
-        if has_white_tags(reader, entry.feed) and not should_be_sent(reader, entry):
+        if has_white_tags(effective_reader, entry.feed) and not should_be_sent(effective_reader, entry):
             logger.info("Entry was not whitelisted: %s", entry.id)
             continue
 
@@ -415,7 +413,7 @@ def send_to_discord(custom_reader: Reader | None = None, feed: Feed | None = Non
                     post_data: dict[str, Any] | None = fetch_hoyolab_post(post_id)
                     if post_data:
                         webhook = create_hoyolab_webhook(webhook_url, entry, post_data)
-                        execute_webhook(webhook, entry)
+                        execute_webhook(webhook, entry, reader=effective_reader)
                         return
                     logger.warning(
                         "Failed to create Hoyolab webhook for feed %s, falling back to regular processing",
@@ -425,7 +423,7 @@ def send_to_discord(custom_reader: Reader | None = None, feed: Feed | None = Non
                 logger.warning("No entry link found for feed %s, falling back to regular processing", entry.feed.url)
 
         # Send the entry to Discord as it is not blacklisted or feed has a whitelist.
-        execute_webhook(webhook, entry)
+        execute_webhook(webhook, entry, reader=effective_reader)
 
         # If we only want to send one entry, we will break the loop. This is used when testing this function.
         if do_once:
@@ -433,16 +431,15 @@ def send_to_discord(custom_reader: Reader | None = None, feed: Feed | None = Non
             break
 
 
-def execute_webhook(webhook: DiscordWebhook, entry: Entry) -> None:
+def execute_webhook(webhook: DiscordWebhook, entry: Entry, reader: Reader) -> None:
     """Execute the webhook.
 
     Args:
         webhook (DiscordWebhook): The webhook to execute.
         entry (Entry): The entry to send to Discord.
+        reader (Reader): The Reader instance to use for checking feed status.
 
     """
-    reader: Reader = get_reader()
-
     # If the feed has been paused or deleted, we will not send the entry to Discord.
     entry_feed: Feed = entry.feed
     if entry_feed.updates_enabled is False:
@@ -493,10 +490,7 @@ def should_send_embed_check(reader: Reader, entry: Entry) -> bool:
         return False
 
     try:
-        should_send_embed = bool(reader.get_tag(entry.feed, "should_send_embed"))
-    except TagNotFoundError:
-        logger.exception("No should_send_embed tag found for feed: %s", entry.feed.url)
-        should_send_embed = True
+        should_send_embed = bool(reader.get_tag(entry.feed, "should_send_embed", True))
     except ReaderError:
         logger.exception("Error getting should_send_embed tag for feed: %s", entry.feed.url)
         should_send_embed = True
@@ -551,9 +545,7 @@ def create_feed(reader: Reader, feed_url: str, webhook_dropdown: str) -> None:
         reader.add_feed(clean_feed_url)
     except FeedExistsError:
         # Add the webhook to an already added feed if it doesn't have a webhook instead of trying to create a new.
-        try:
-            reader.get_tag(clean_feed_url, "webhook")
-        except TagNotFoundError:
+        if not reader.get_tag(clean_feed_url, "webhook", ""):
             reader.set_tag(clean_feed_url, "webhook", webhook_url)  # pyright: ignore[reportArgumentType]
     except ReaderError as e:
         raise HTTPException(status_code=404, detail=f"Error adding feed: {e}") from e
@@ -580,5 +572,3 @@ def create_feed(reader: Reader, feed_url: str, webhook_dropdown: str) -> None:
 
     # Update the full-text search index so our new feed is searchable.
     reader.update_search()
-
-    add_missing_tags(reader)
diff --git a/discord_rss_bot/filter/blacklist.py b/discord_rss_bot/filter/blacklist.py
index 95c0716..8260993 100644
--- a/discord_rss_bot/filter/blacklist.py
+++ b/discord_rss_bot/filter/blacklist.py
@@ -11,7 +11,7 @@ if TYPE_CHECKING:
     from reader import Reader
 
 
-def feed_has_blacklist_tags(custom_reader: Reader, feed: Feed) -> bool:
+def feed_has_blacklist_tags(reader: Reader, feed: Feed) -> bool:
     """Return True if the feed has blacklist tags.
 
     The following tags are checked:
@@ -25,21 +25,21 @@ def feed_has_blacklist_tags(custom_reader: Reader, feed: Feed) -> bool:
     - regex_blacklist_title
 
     Args:
-        custom_reader: The reader.
+        reader: The reader.
         feed: The feed to check.
 
     Returns:
         bool: If the feed has any of the tags.
     """
-    blacklist_author: str = str(custom_reader.get_tag(feed, "blacklist_author", "")).strip()
-    blacklist_content: str = str(custom_reader.get_tag(feed, "blacklist_content", "")).strip()
-    blacklist_summary: str = str(custom_reader.get_tag(feed, "blacklist_summary", "")).strip()
-    blacklist_title: str = str(custom_reader.get_tag(feed, "blacklist_title", "")).strip()
+    blacklist_author: str = str(reader.get_tag(feed, "blacklist_author", "")).strip()
+    blacklist_content: str = str(reader.get_tag(feed, "blacklist_content", "")).strip()
+    blacklist_summary: str = str(reader.get_tag(feed, "blacklist_summary", "")).strip()
+    blacklist_title: str = str(reader.get_tag(feed, "blacklist_title", "")).strip()
 
-    regex_blacklist_author: str = str(custom_reader.get_tag(feed, "regex_blacklist_author", "")).strip()
-    regex_blacklist_content: str = str(custom_reader.get_tag(feed, "regex_blacklist_content", "")).strip()
-    regex_blacklist_summary: str = str(custom_reader.get_tag(feed, "regex_blacklist_summary", "")).strip()
-    regex_blacklist_title: str = str(custom_reader.get_tag(feed, "regex_blacklist_title", "")).strip()
+    regex_blacklist_author: str = str(reader.get_tag(feed, "regex_blacklist_author", "")).strip()
+    regex_blacklist_content: str = str(reader.get_tag(feed, "regex_blacklist_content", "")).strip()
+    regex_blacklist_summary: str = str(reader.get_tag(feed, "regex_blacklist_summary", "")).strip()
+    regex_blacklist_title: str = str(reader.get_tag(feed, "regex_blacklist_title", "")).strip()
 
     return bool(
         blacklist_title
@@ -53,11 +53,11 @@ def feed_has_blacklist_tags(custom_reader: Reader, feed: Feed) -> bool:
     )
 
 
-def entry_should_be_skipped(custom_reader: Reader, entry: Entry) -> bool:  # noqa: PLR0911
+def entry_should_be_skipped(reader: Reader, entry: Entry) -> bool:  # noqa: PLR0911
     """Return True if the entry is in the blacklist.
 
     Args:
-        custom_reader: The reader.
+        reader: The reader.
         entry: The entry to check.
 
     Returns:
@@ -65,15 +65,15 @@ def entry_should_be_skipped(custom_reader: Reader, entry: Entry) -> bool:  # noq
     """
     feed = entry.feed
 
-    blacklist_title: str = str(custom_reader.get_tag(feed, "blacklist_title", "")).strip()
-    blacklist_summary: str = str(custom_reader.get_tag(feed, "blacklist_summary", "")).strip()
-    blacklist_content: str = str(custom_reader.get_tag(feed, "blacklist_content", "")).strip()
-    blacklist_author: str = str(custom_reader.get_tag(feed, "blacklist_author", "")).strip()
+    blacklist_title: str = str(reader.get_tag(feed, "blacklist_title", "")).strip()
+    blacklist_summary: str = str(reader.get_tag(feed, "blacklist_summary", "")).strip()
+    blacklist_content: str = str(reader.get_tag(feed, "blacklist_content", "")).strip()
+    blacklist_author: str = str(reader.get_tag(feed, "blacklist_author", "")).strip()
 
-    regex_blacklist_title: str = str(custom_reader.get_tag(feed, "regex_blacklist_title", "")).strip()
-    regex_blacklist_summary: str = str(custom_reader.get_tag(feed, "regex_blacklist_summary", "")).strip()
-    regex_blacklist_content: str = str(custom_reader.get_tag(feed, "regex_blacklist_content", "")).strip()
-    regex_blacklist_author: str = str(custom_reader.get_tag(feed, "regex_blacklist_author", "")).strip()
+    regex_blacklist_title: str = str(reader.get_tag(feed, "regex_blacklist_title", "")).strip()
+    regex_blacklist_summary: str = str(reader.get_tag(feed, "regex_blacklist_summary", "")).strip()
+    regex_blacklist_content: str = str(reader.get_tag(feed, "regex_blacklist_content", "")).strip()
+    regex_blacklist_author: str = str(reader.get_tag(feed, "regex_blacklist_author", "")).strip()
     # TODO(TheLovinator): Also add support for entry_text and more.
 
     # Check regular blacklist
diff --git a/discord_rss_bot/filter/whitelist.py b/discord_rss_bot/filter/whitelist.py
index 9c198c4..bb5303d 100644
--- a/discord_rss_bot/filter/whitelist.py
+++ b/discord_rss_bot/filter/whitelist.py
@@ -11,7 +11,7 @@ if TYPE_CHECKING:
     from reader import Reader
 
 
-def has_white_tags(custom_reader: Reader, feed: Feed) -> bool:
+def has_white_tags(reader: Reader, feed: Feed) -> bool:
     """Return True if the feed has whitelist tags.
 
     The following tags are checked:
@@ -25,21 +25,21 @@ def has_white_tags(custom_reader: Reader, feed: Feed) -> bool:
     - whitelist_title
 
     Args:
-        custom_reader: The reader.
+        reader: The reader.
         feed: The feed to check.
 
     Returns:
         bool: If the feed has any of the tags.
     """
-    whitelist_title: str = str(custom_reader.get_tag(feed, "whitelist_title", "")).strip()
-    whitelist_summary: str = str(custom_reader.get_tag(feed, "whitelist_summary", "")).strip()
-    whitelist_content: str = str(custom_reader.get_tag(feed, "whitelist_content", "")).strip()
-    whitelist_author: str = str(custom_reader.get_tag(feed, "whitelist_author", "")).strip()
+    whitelist_title: str = str(reader.get_tag(feed, "whitelist_title", "")).strip()
+    whitelist_summary: str = str(reader.get_tag(feed, "whitelist_summary", "")).strip()
+    whitelist_content: str = str(reader.get_tag(feed, "whitelist_content", "")).strip()
+    whitelist_author: str = str(reader.get_tag(feed, "whitelist_author", "")).strip()
 
-    regex_whitelist_title: str = str(custom_reader.get_tag(feed, "regex_whitelist_title", "")).strip()
-    regex_whitelist_summary: str = str(custom_reader.get_tag(feed, "regex_whitelist_summary", "")).strip()
-    regex_whitelist_content: str = str(custom_reader.get_tag(feed, "regex_whitelist_content", "")).strip()
-    regex_whitelist_author: str = str(custom_reader.get_tag(feed, "regex_whitelist_author", "")).strip()
+    regex_whitelist_title: str = str(reader.get_tag(feed, "regex_whitelist_title", "")).strip()
+    regex_whitelist_summary: str = str(reader.get_tag(feed, "regex_whitelist_summary", "")).strip()
+    regex_whitelist_content: str = str(reader.get_tag(feed, "regex_whitelist_content", "")).strip()
+    regex_whitelist_author: str = str(reader.get_tag(feed, "regex_whitelist_author", "")).strip()
 
     return bool(
         whitelist_title
@@ -53,11 +53,11 @@ def has_white_tags(custom_reader: Reader, feed: Feed) -> bool:
     )
 
 
-def should_be_sent(custom_reader: Reader, entry: Entry) -> bool:  # noqa: PLR0911
+def should_be_sent(reader: Reader, entry: Entry) -> bool:  # noqa: PLR0911
     """Return True if the entry is in the whitelist.
 
     Args:
-        custom_reader: The reader.
+        reader: The reader.
         entry: The entry to check.
 
     Returns:
@@ -65,16 +65,16 @@ def should_be_sent(custom_reader: Reader, entry: Entry) -> bool:  # noqa: PLR091
     """
     feed: Feed = entry.feed
     # Regular whitelist tags
-    whitelist_title: str = str(custom_reader.get_tag(feed, "whitelist_title", "")).strip()
-    whitelist_summary: str = str(custom_reader.get_tag(feed, "whitelist_summary", "")).strip()
-    whitelist_content: str = str(custom_reader.get_tag(feed, "whitelist_content", "")).strip()
-    whitelist_author: str = str(custom_reader.get_tag(feed, "whitelist_author", "")).strip()
+    whitelist_title: str = str(reader.get_tag(feed, "whitelist_title", "")).strip()
+    whitelist_summary: str = str(reader.get_tag(feed, "whitelist_summary", "")).strip()
+    whitelist_content: str = str(reader.get_tag(feed, "whitelist_content", "")).strip()
+    whitelist_author: str = str(reader.get_tag(feed, "whitelist_author", "")).strip()
 
     # Regex whitelist tags
-    regex_whitelist_title: str = str(custom_reader.get_tag(feed, "regex_whitelist_title", "")).strip()
-    regex_whitelist_summary: str = str(custom_reader.get_tag(feed, "regex_whitelist_summary", "")).strip()
-    regex_whitelist_content: str = str(custom_reader.get_tag(feed, "regex_whitelist_content", "")).strip()
-    regex_whitelist_author: str = str(custom_reader.get_tag(feed, "regex_whitelist_author", "")).strip()
+    regex_whitelist_title: str = str(reader.get_tag(feed, "regex_whitelist_title", "")).strip()
+    regex_whitelist_summary: str = str(reader.get_tag(feed, "regex_whitelist_summary", "")).strip()
+    regex_whitelist_content: str = str(reader.get_tag(feed, "regex_whitelist_content", "")).strip()
+    regex_whitelist_author: str = str(reader.get_tag(feed, "regex_whitelist_author", "")).strip()
 
     # Check regular whitelist
     if entry.title and whitelist_title and is_word_in_text(whitelist_title, entry.title):
diff --git a/discord_rss_bot/git_backup.py b/discord_rss_bot/git_backup.py
index b226489..49528ec 100644
--- a/discord_rss_bot/git_backup.py
+++ b/discord_rss_bot/git_backup.py
@@ -30,8 +30,6 @@ from pathlib import Path
 from typing import TYPE_CHECKING
 from typing import Any
 
-from reader import TagNotFoundError
-
 if TYPE_CHECKING:
     from reader import Reader
 
@@ -176,21 +174,15 @@ def export_state(reader: Reader, backup_path: Path) -> None:
                 logger.exception("Failed to read tag '%s' for feed '%s' during state export", tag, feed.url)
         feeds_state.append(feed_data)
 
-    try:
-        webhooks: list[str | int | float | bool | dict[str, Any] | list[Any] | None] = list(
-            reader.get_tag((), "webhooks", []),
-        )
-    except TagNotFoundError:
-        webhooks = []
+    webhooks: list[str | int | float | bool | dict[str, Any] | list[Any] | None] = list(
+        reader.get_tag((), "webhooks", []),
+    )
 
     # Export global update interval if set
     global_update_interval: dict[str, Any] | None = None
-    try:
-        global_update_config = reader.get_tag((), ".reader.update", None)
-        if isinstance(global_update_config, dict):
-            global_update_interval = global_update_config
-    except TagNotFoundError:
-        pass
+    global_update_config = reader.get_tag((), ".reader.update", None)
+    if isinstance(global_update_config, dict):
+        global_update_interval = global_update_config
 
     state: dict = {"feeds": feeds_state, "webhooks": webhooks}
     if global_update_interval is not None:
diff --git a/discord_rss_bot/main.py b/discord_rss_bot/main.py
index 7c5e7ac..ca3894c 100644
--- a/discord_rss_bot/main.py
+++ b/discord_rss_bot/main.py
@@ -19,6 +19,7 @@ import httpx
 import sentry_sdk
 import uvicorn
 from apscheduler.schedulers.asyncio import AsyncIOScheduler
+from fastapi import Depends
 from fastapi import FastAPI
 from fastapi import Form
 from fastapi import HTTPException
@@ -53,7 +54,7 @@ from discord_rss_bot.feeds import send_entry_to_discord
 from discord_rss_bot.feeds import send_to_discord
 from discord_rss_bot.git_backup import commit_state_change
 from discord_rss_bot.git_backup import get_backup_path
-from discord_rss_bot.missing_tags import add_missing_tags
+from discord_rss_bot.is_url_valid import is_url_valid
 from discord_rss_bot.search import create_search_context
 from discord_rss_bot.settings import get_reader
 
@@ -100,7 +101,16 @@ LOGGING_CONFIG: dict[str, Any] = {
 logging.config.dictConfig(LOGGING_CONFIG)
 
 logger: logging.Logger = logging.getLogger(__name__)
-reader: Reader = get_reader()
+
+
+def get_reader_dependency() -> Reader:
+    """Provide the app Reader instance as a FastAPI dependency.
+
+    Returns:
+        Reader: The shared Reader instance.
+    """
+    return get_reader()
+
 
 # Time constants for relative time formatting
 SECONDS_PER_MINUTE = 60
@@ -146,7 +156,7 @@ def relative_time(dt: datetime | None) -> str:
 @asynccontextmanager
 async def lifespan(app: FastAPI) -> AsyncGenerator[None]:
     """Lifespan function for the FastAPI app."""
-    add_missing_tags(reader)
+    reader: Reader = get_reader()
     scheduler: AsyncIOScheduler = AsyncIOScheduler(timezone=UTC)
     scheduler.add_job(
         func=send_to_discord,
@@ -170,8 +180,6 @@ templates: Jinja2Templates = Jinja2Templates(directory="discord_rss_bot/template
 
 # Add the filters to the Jinja2 environment so they can be used in html templates.
 templates.env.filters["encode_url"] = lambda url: urllib.parse.quote(url) if url else ""
-templates.env.filters["entry_is_whitelisted"] = entry_is_whitelisted
-templates.env.filters["entry_is_blacklisted"] = entry_is_blacklisted
 templates.env.filters["discord_markdown"] = markdownify
 templates.env.filters["relative_time"] = relative_time
 templates.env.globals["get_backup_path"] = get_backup_path
@@ -181,12 +189,14 @@ templates.env.globals["get_backup_path"] = get_backup_path
 async def post_add_webhook(
     webhook_name: Annotated[str, Form()],
     webhook_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
 ) -> RedirectResponse:
     """Add a feed to the database.
 
     Args:
         webhook_name: The name of the webhook.
         webhook_url: The url of the webhook.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the index page.
@@ -219,11 +229,15 @@ async def post_add_webhook(
 
 
 @app.post("/delete_webhook")
-async def post_delete_webhook(webhook_url: Annotated[str, Form()]) -> RedirectResponse:
+async def post_delete_webhook(
+    webhook_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+) -> RedirectResponse:
     """Delete a webhook from the database.
 
     Args:
         webhook_url: The url of the webhook.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the index page.
@@ -266,12 +280,14 @@ async def post_delete_webhook(webhook_url: Annotated[str, Form()]) -> RedirectRe
 async def post_create_feed(
     feed_url: Annotated[str, Form()],
     webhook_dropdown: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
 ) -> RedirectResponse:
     """Add a feed to the database.
 
     Args:
         feed_url: The feed to add.
         webhook_dropdown: The webhook to use.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -283,11 +299,15 @@ async def post_create_feed(
 
 
 @app.post("/pause")
-async def post_pause_feed(feed_url: Annotated[str, Form()]) -> RedirectResponse:
+async def post_pause_feed(
+    feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+) -> RedirectResponse:
     """Pause a feed.
 
     Args:
         feed_url: The feed to pause.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -298,11 +318,15 @@ async def post_pause_feed(feed_url: Annotated[str, Form()]) -> RedirectResponse:
 
 
 @app.post("/unpause")
-async def post_unpause_feed(feed_url: Annotated[str, Form()]) -> RedirectResponse:
+async def post_unpause_feed(
+    feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+) -> RedirectResponse:
     """Unpause a feed.
 
     Args:
         feed_url: The Feed to unpause.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -314,6 +338,7 @@ async def post_unpause_feed(feed_url: Annotated[str, Form()]) -> RedirectRespons
 
 @app.post("/whitelist")
 async def post_set_whitelist(
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
     whitelist_title: Annotated[str, Form()] = "",
     whitelist_summary: Annotated[str, Form()] = "",
     whitelist_content: Annotated[str, Form()] = "",
@@ -336,6 +361,7 @@ async def post_set_whitelist(
         regex_whitelist_content: Whitelisted regex for when checking the content.
         regex_whitelist_author: Whitelisted regex for when checking the author.
         feed_url: The feed we should set the whitelist for.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -356,12 +382,17 @@ async def post_set_whitelist(
 
 
 @app.get("/whitelist", response_class=HTMLResponse)
-async def get_whitelist(feed_url: str, request: Request):
+async def get_whitelist(
+    feed_url: str,
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Get the whitelist.
 
     Args:
         feed_url: What feed we should get the whitelist for.
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The whitelist page.
@@ -395,6 +426,7 @@ async def get_whitelist(feed_url: str, request: Request):
 
 @app.post("/blacklist")
 async def post_set_blacklist(
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
     blacklist_title: Annotated[str, Form()] = "",
     blacklist_summary: Annotated[str, Form()] = "",
     blacklist_content: Annotated[str, Form()] = "",
@@ -420,6 +452,7 @@ async def post_set_blacklist(
         regex_blacklist_content: Blacklisted regex for when checking the content.
         regex_blacklist_author: Blacklisted regex for when checking the author.
         feed_url: What feed we should set the blacklist for.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -438,12 +471,17 @@ async def post_set_blacklist(
 
 
 @app.get("/blacklist", response_class=HTMLResponse)
-async def get_blacklist(feed_url: str, request: Request):
+async def get_blacklist(
+    feed_url: str,
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Get the blacklist.
 
     Args:
         feed_url: What feed we should get the blacklist for.
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The blacklist page.
@@ -477,6 +515,7 @@ async def get_blacklist(feed_url: str, request: Request):
 @app.post("/custom")
 async def post_set_custom(
     feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
     custom_message: Annotated[str, Form()] = "",
 ) -> RedirectResponse:
     """Set the custom message, this is used when sending the message.
@@ -484,6 +523,7 @@ async def post_set_custom(
     Args:
         custom_message: The custom message.
         feed_url: The feed we should set the custom message for.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -505,12 +545,17 @@ async def post_set_custom(
 
 
 @app.get("/custom", response_class=HTMLResponse)
-async def get_custom(feed_url: str, request: Request):
+async def get_custom(
+    feed_url: str,
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Get the custom message. This is used when sending the message to Discord.
 
     Args:
         feed_url: What feed we should get the custom message for.
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The custom message page.
@@ -531,12 +576,17 @@ async def get_custom(feed_url: str, request: Request):
 
 
 @app.get("/embed", response_class=HTMLResponse)
-async def get_embed_page(feed_url: str, request: Request):
+async def get_embed_page(
+    feed_url: str,
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Get the custom message. This is used when sending the message to Discord.
 
     Args:
         feed_url: What feed we should get the custom message for.
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The embed page.
@@ -572,6 +622,7 @@ async def get_embed_page(feed_url: str, request: Request):
 @app.post("/embed", response_class=HTMLResponse)
 async def post_embed(
     feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
     title: Annotated[str, Form()] = "",
     description: Annotated[str, Form()] = "",
     color: Annotated[str, Form()] = "",
@@ -597,7 +648,7 @@ async def post_embed(
         author_icon_url: The author icon url of the embed.
         footer_text: The footer text of the embed.
         footer_icon_url: The footer icon url of the embed.
-
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the embed page.
@@ -625,11 +676,15 @@ async def post_embed(
 
 
 @app.post("/use_embed")
-async def post_use_embed(feed_url: Annotated[str, Form()]) -> RedirectResponse:
+async def post_use_embed(
+    feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+) -> RedirectResponse:
     """Use embed instead of text.
 
     Args:
         feed_url: The feed to change.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -641,11 +696,15 @@ async def post_use_embed(feed_url: Annotated[str, Form()]) -> RedirectResponse:
 
 
 @app.post("/use_text")
-async def post_use_text(feed_url: Annotated[str, Form()]) -> RedirectResponse:
+async def post_use_text(
+    feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+) -> RedirectResponse:
     """Use text instead of embed.
 
     Args:
         feed_url: The feed to change.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -659,6 +718,7 @@ async def post_use_text(feed_url: Annotated[str, Form()]) -> RedirectResponse:
 @app.post("/set_update_interval")
 async def post_set_update_interval(
     feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
     interval_minutes: Annotated[int | None, Form()] = None,
     redirect_to: Annotated[str, Form()] = "",
 ) -> RedirectResponse:
@@ -668,6 +728,7 @@ async def post_set_update_interval(
         feed_url: The feed to change.
         interval_minutes: The update interval in minutes (None to reset to global default).
         redirect_to: Optional redirect URL (defaults to feed page).
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the specified page or feed page.
@@ -703,12 +764,14 @@ async def post_set_update_interval(
 async def post_change_feed_url(
     old_feed_url: Annotated[str, Form()],
     new_feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
 ) -> RedirectResponse:
     """Change the URL for an existing feed.
 
     Args:
         old_feed_url: Current feed URL.
         new_feed_url: New feed URL to change to.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page for the resulting URL.
@@ -734,6 +797,19 @@ async def post_change_feed_url(
     except ReaderError as e:
         raise HTTPException(status_code=400, detail=f"Failed to change feed URL: {e}") from e
 
+    # Update the feed with the new URL so we can discover what entries it returns.
+    # Then mark all unread entries as read so the scheduler doesn't resend them.
+    try:
+        reader.update_feed(clean_new_feed_url)
+    except Exception:
+        logger.exception("Failed to update feed after URL change: %s", clean_new_feed_url)
+
+    for entry in reader.get_entries(feed=clean_new_feed_url, read=False):
+        try:
+            reader.set_entry_read(entry, True)
+        except Exception:
+            logger.exception("Failed to mark entry as read after URL change: %s", entry.id)
+
     commit_state_change(reader, f"Change feed URL from {clean_old_feed_url} to {clean_new_feed_url}")
     return RedirectResponse(url=f"/feed?feed_url={urllib.parse.quote(clean_new_feed_url)}", status_code=303)
 
@@ -741,6 +817,7 @@ async def post_change_feed_url(
 @app.post("/reset_update_interval")
 async def post_reset_update_interval(
     feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
     redirect_to: Annotated[str, Form()] = "",
 ) -> RedirectResponse:
     """Reset the update interval for a feed to use the global default.
@@ -748,6 +825,7 @@ async def post_reset_update_interval(
     Args:
         feed_url: The feed to change.
         redirect_to: Optional redirect URL (defaults to feed page).
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the specified page or feed page.
@@ -774,11 +852,15 @@ async def post_reset_update_interval(
 
 
 @app.post("/set_global_update_interval")
-async def post_set_global_update_interval(interval_minutes: Annotated[int, Form()]) -> RedirectResponse:
+async def post_set_global_update_interval(
+    interval_minutes: Annotated[int, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+) -> RedirectResponse:
     """Set the global default update interval.
 
     Args:
         interval_minutes: The update interval in minutes.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the settings page.
@@ -792,11 +874,15 @@ async def post_set_global_update_interval(interval_minutes: Annotated[int, Form(
 
 
 @app.get("/add", response_class=HTMLResponse)
-def get_add(request: Request):
+def get_add(
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Page for adding a new feed.
 
     Args:
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The add feed page.
@@ -809,13 +895,19 @@ def get_add(request: Request):
 
 
 @app.get("/feed", response_class=HTMLResponse)
-async def get_feed(feed_url: str, request: Request, starting_after: str = ""):  # noqa: C901, PLR0912, PLR0914, PLR0915
+async def get_feed(  # noqa: C901, PLR0912, PLR0914, PLR0915
+    feed_url: str,
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+    starting_after: str = "",
+):
     """Get a feed by URL.
 
     Args:
         feed_url: The feed to add.
         request: The request object.
         starting_after: The entry to start after. Used for pagination.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The feed page.
@@ -845,28 +937,22 @@ async def get_feed(feed_url: str, request: Request, starting_after: str = ""):
         except EntryNotFoundError as e:
             current_entries = list(reader.get_entries(feed=clean_feed_url))
             msg: str = f"{e}\n\n{[entry.id for entry in current_entries]}"
-            html: str = create_html_for_feed(current_entries, clean_feed_url)
+            html: str = create_html_for_feed(reader=reader, entries=current_entries, current_feed_url=clean_feed_url)
 
             # Get feed and global intervals for error case too
             feed_interval: int | None = None
-            try:
-                feed_update_config = reader.get_tag(feed, ".reader.update")
-                if isinstance(feed_update_config, dict) and "interval" in feed_update_config:
-                    interval_value = feed_update_config["interval"]
-                    if isinstance(interval_value, int):
-                        feed_interval = interval_value
-            except TagNotFoundError:
-                pass
+            feed_update_config = reader.get_tag(feed, ".reader.update", None)
+            if isinstance(feed_update_config, dict) and "interval" in feed_update_config:
+                interval_value = feed_update_config["interval"]
+                if isinstance(interval_value, int):
+                    feed_interval = interval_value
 
             global_interval: int = 60
-            try:
-                global_update_config = reader.get_tag((), ".reader.update")
-                if isinstance(global_update_config, dict) and "interval" in global_update_config:
-                    interval_value = global_update_config["interval"]
-                    if isinstance(interval_value, int):
-                        global_interval = interval_value
-            except TagNotFoundError:
-                pass
+            global_update_config = reader.get_tag((), ".reader.update", None)
+            if isinstance(global_update_config, dict) and "interval" in global_update_config:
+                interval_value = global_update_config["interval"]
+                if isinstance(interval_value, int):
+                    global_interval = interval_value
 
             context = {
                 "request": request,
@@ -901,36 +987,25 @@ async def get_feed(feed_url: str, request: Request, starting_after: str = ""):
         last_entry = entries[-1]
 
     # Create the html for the entries.
-    html: str = create_html_for_feed(entries, clean_feed_url)
+    html: str = create_html_for_feed(reader=reader, entries=entries, current_feed_url=clean_feed_url)
 
-    try:
-        should_send_embed: bool = bool(reader.get_tag(feed, "should_send_embed"))
-    except TagNotFoundError:
-        add_missing_tags(reader)
-        should_send_embed: bool = bool(reader.get_tag(feed, "should_send_embed"))
+    should_send_embed: bool = bool(reader.get_tag(feed, "should_send_embed", True))
 
     # Get the update interval for this feed
     feed_interval: int | None = None
-    try:
-        feed_update_config = reader.get_tag(feed, ".reader.update")
-        if isinstance(feed_update_config, dict) and "interval" in feed_update_config:
-            interval_value = feed_update_config["interval"]
-            if isinstance(interval_value, int):
-                feed_interval = interval_value
-    except TagNotFoundError:
-        # No custom interval set for this feed, will use global default
-        pass
+    feed_update_config = reader.get_tag(feed, ".reader.update", None)
+    if isinstance(feed_update_config, dict) and "interval" in feed_update_config:
+        interval_value = feed_update_config["interval"]
+        if isinstance(interval_value, int):
+            feed_interval = interval_value
 
     # Get the global default update interval
     global_interval: int = 60  # Default to 60 minutes if not set
-    try:
-        global_update_config = reader.get_tag((), ".reader.update")
-        if isinstance(global_update_config, dict) and "interval" in global_update_config:
-            interval_value = global_update_config["interval"]
-            if isinstance(interval_value, int):
-                global_interval = interval_value
-    except TagNotFoundError:
-        pass
+    global_update_config = reader.get_tag((), ".reader.update", None)
+    if isinstance(global_update_config, dict) and "interval" in global_update_config:
+        interval_value = global_update_config["interval"]
+        if isinstance(interval_value, int):
+            global_interval = interval_value
 
     context = {
         "request": request,
@@ -948,10 +1023,15 @@ async def get_feed(feed_url: str, request: Request, starting_after: str = ""):
     return templates.TemplateResponse(request=request, name="feed.html", context=context)
 
 
-def create_html_for_feed(entries: Iterable[Entry], current_feed_url: str = "") -> str:  # noqa: C901, PLR0914
+def create_html_for_feed(  # noqa: C901, PLR0914
+    reader: Reader,
+    entries: Iterable[Entry],
+    current_feed_url: str = "",
+) -> str:
     """Create HTML for the search results.
 
     Args:
+        reader: The Reader instance to use.
         entries: The entries to create HTML for.
         current_feed_url: The feed URL currently being viewed in /feed.
 
@@ -969,17 +1049,19 @@ def create_html_for_feed(entries: Iterable[Entry], current_feed_url: str = "") -
 
         first_image = get_first_image(summary, content)
 
-        text: str = replace_tags_in_text_message(entry) or "<div class='text-muted'>No content available.</div>"
+        text: str = replace_tags_in_text_message(entry, reader=reader) or (
+            "<div class='text-muted'>No content available.</div>"
+        )
         published = ""
         if entry.published:
             published: str = entry.published.strftime("%Y-%m-%d %H:%M:%S")
 
         blacklisted: str = ""
-        if entry_is_blacklisted(entry):
+        if entry_is_blacklisted(entry, reader=reader):
             blacklisted = "<span class='badge bg-danger'>Blacklisted</span>"
 
         whitelisted: str = ""
-        if entry_is_whitelisted(entry):
+        if entry_is_whitelisted(entry, reader=reader):
             whitelisted = "<span class='badge bg-success'>Whitelisted</span>"
 
         source_feed_url: str = getattr(entry, "original_feed_url", None) or entry.feed.url
@@ -999,7 +1081,11 @@ def create_html_for_feed(entries: Iterable[Entry], current_feed_url: str = "") -
             )
 
         entry_id: str = urllib.parse.quote(entry.id)
-        to_discord_html: str = f"<a class='text-muted' href='/post_entry?entry_id={entry_id}'>Send to Discord</a>"
+        encoded_source_feed_url: str = urllib.parse.quote(source_feed_url)
+        to_discord_html: str = (
+            f"<a class='text-muted' href='/post_entry?entry_id={entry_id}&feed_url={encoded_source_feed_url}'>"
+            "Send to Discord</a>"
+        )
 
         # Check if this is a YouTube feed entry and the entry has a link
         is_youtube_feed = "youtube.com/feeds/videos.xml" in entry.feed.url
@@ -1070,6 +1156,7 @@ def get_data_from_hook_url(hook_name: str, hook_url: str) -> WebhookInfo:
         hook_name (str): The webhook name.
         hook_url (str): The webhook URL.
 
+
     Returns:
         WebhookInfo: The webhook username, avatar, guild id, etc.
     """
@@ -1091,39 +1178,37 @@ def get_data_from_hook_url(hook_name: str, hook_url: str) -> WebhookInfo:
 
 
 @app.get("/settings", response_class=HTMLResponse)
-async def get_settings(request: Request):
+async def get_settings(
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Settings page.
 
     Args:
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The settings page.
     """
     # Get the global default update interval
     global_interval: int = 60  # Default to 60 minutes if not set
-    try:
-        global_update_config = reader.get_tag((), ".reader.update")
-        if isinstance(global_update_config, dict) and "interval" in global_update_config:
-            interval_value = global_update_config["interval"]
-            if isinstance(interval_value, int):
-                global_interval = interval_value
-    except TagNotFoundError:
-        pass
+    global_update_config = reader.get_tag((), ".reader.update", None)
+    if isinstance(global_update_config, dict) and "interval" in global_update_config:
+        interval_value = global_update_config["interval"]
+        if isinstance(interval_value, int):
+            global_interval = interval_value
 
     # Get all feeds with their intervals
     feeds: Iterable[Feed] = reader.get_feeds()
     feed_intervals = []
     for feed in feeds:
         feed_interval: int | None = None
-        try:
-            feed_update_config = reader.get_tag(feed, ".reader.update")
-            if isinstance(feed_update_config, dict) and "interval" in feed_update_config:
-                interval_value = feed_update_config["interval"]
-                if isinstance(interval_value, int):
-                    feed_interval = interval_value
-        except TagNotFoundError:
-            pass
+        feed_update_config = reader.get_tag(feed, ".reader.update", None)
+        if isinstance(feed_update_config, dict) and "interval" in feed_update_config:
+            interval_value = feed_update_config["interval"]
+            if isinstance(interval_value, int):
+                feed_interval = interval_value
 
         feed_intervals.append({
             "feed": feed,
@@ -1141,11 +1226,15 @@ async def get_settings(request: Request):
 
 
 @app.get("/webhooks", response_class=HTMLResponse)
-async def get_webhooks(request: Request):
+async def get_webhooks(
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Page for adding a new webhook.
 
     Args:
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The add webhook page.
@@ -1166,54 +1255,65 @@ async def get_webhooks(request: Request):
 
 
 @app.get("/", response_class=HTMLResponse)
-def get_index(request: Request, message: str = ""):
+def get_index(
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+    message: str = "",
+):
     """This is the root of the website.
 
     Args:
         request: The request object.
         message: Optional message to display to the user.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The index page.
     """
-    return templates.TemplateResponse(request=request, name="index.html", context=make_context_index(request, message))
+    return templates.TemplateResponse(
+        request=request,
+        name="index.html",
+        context=make_context_index(request, message, reader),
+    )
 
 
-def make_context_index(request: Request, message: str = ""):
+def make_context_index(request: Request, message: str = "", reader: Reader | None = None):
     """Create the needed context for the index page.
 
     Args:
         request: The request object.
         message: Optional message to display to the user.
+        reader: The Reader instance.
 
     Returns:
             dict: The context for the index page.
     """
-    hooks: list[dict[str, str]] = cast("list[dict[str, str]]", list(reader.get_tag((), "webhooks", [])))
+    effective_reader: Reader = reader or get_reader_dependency()
+    hooks: list[dict[str, str]] = cast("list[dict[str, str]]", list(effective_reader.get_tag((), "webhooks", [])))
 
-    feed_list = []
-    broken_feeds = []
-    feeds_without_attached_webhook = []
+    feed_list: list[dict[str, JSONType | Feed | str]] = []
+    broken_feeds: list[Feed] = []
+    feeds_without_attached_webhook: list[Feed] = []
 
     # Get all feeds and organize them
-    feeds: Iterable[Feed] = reader.get_feeds()
+    feeds: Iterable[Feed] = effective_reader.get_feeds()
     for feed in feeds:
-        try:
-            webhook = reader.get_tag(feed.url, "webhook")
-            feed_list.append({"feed": feed, "webhook": webhook, "domain": extract_domain(feed.url)})
-        except TagNotFoundError:
+        webhook: str = str(effective_reader.get_tag(feed.url, "webhook", ""))
+        if not webhook:
             broken_feeds.append(feed)
             continue
 
-        webhook_list = [hook["url"] for hook in hooks]
+        feed_list.append({"feed": feed, "webhook": webhook, "domain": extract_domain(feed.url)})
+
+        webhook_list: list[str] = [hook["url"] for hook in hooks]
         if webhook not in webhook_list:
             feeds_without_attached_webhook.append(feed)
 
     return {
         "request": request,
         "feeds": feed_list,
-        "feed_count": reader.get_feed_counts(),
-        "entry_count": reader.get_entry_counts(),
+        "feed_count": effective_reader.get_feed_counts(),
+        "entry_count": effective_reader.get_entry_counts(),
         "webhooks": hooks,
         "broken_feeds": broken_feeds,
         "feeds_without_attached_webhook": feeds_without_attached_webhook,
@@ -1222,12 +1322,15 @@ def make_context_index(request: Request, message: str = ""):
 
 
 @app.post("/remove", response_class=HTMLResponse)
-async def remove_feed(feed_url: Annotated[str, Form()]):
+async def remove_feed(
+    feed_url: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Get a feed by URL.
 
     Args:
         feed_url: The feed to add.
-
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the index page.
@@ -1246,13 +1349,17 @@ async def remove_feed(feed_url: Annotated[str, Form()]):
 
 
 @app.get("/update", response_class=HTMLResponse)
-async def update_feed(request: Request, feed_url: str):
+async def update_feed(
+    request: Request,
+    feed_url: str,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Update a feed.
 
     Args:
         request: The request object.
         feed_url: The feed URL to update.
-
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
@@ -1270,11 +1377,15 @@ async def update_feed(request: Request, feed_url: str):
 
 
 @app.post("/backup")
-async def manual_backup(request: Request) -> RedirectResponse:
+async def manual_backup(
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+) -> RedirectResponse:
     """Manually trigger a git backup of the current state.
 
     Args:
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the index page with a success or error message.
@@ -1297,51 +1408,81 @@ async def manual_backup(request: Request) -> RedirectResponse:
 
 
 @app.get("/search", response_class=HTMLResponse)
-async def search(request: Request, query: str):
+async def search(
+    request: Request,
+    query: str,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+):
     """Get entries matching a full-text search query.
 
     Args:
         query: The query to search for.
         request: The request object.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The search page.
     """
     reader.update_search()
-    context = create_search_context(query)
+    context = create_search_context(query, reader=reader)
     return templates.TemplateResponse(request=request, name="search.html", context={"request": request, **context})
 
 
 @app.get("/post_entry", response_class=HTMLResponse)
-async def post_entry(entry_id: str):
+async def post_entry(
+    entry_id: str,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+    feed_url: str = "",
+):
     """Send single entry to Discord.
 
     Args:
         entry_id: The entry to send.
+        feed_url: Optional feed URL used to disambiguate entries with identical IDs.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the feed page.
     """
     unquoted_entry_id: str = urllib.parse.unquote(entry_id)
-    entry: Entry | None = next((entry for entry in reader.get_entries() if entry.id == unquoted_entry_id), None)
+    clean_feed_url: str = urllib.parse.unquote(feed_url.strip()) if feed_url else ""
+
+    # Prefer feed-scoped lookup when feed_url is provided. This avoids ambiguity when
+    # multiple feeds contain entries with the same ID.
+    entry: Entry | None = None
+    if clean_feed_url:
+        entry = next(
+            (entry for entry in reader.get_entries(feed=clean_feed_url) if entry.id == unquoted_entry_id),
+            None,
+        )
+    else:
+        entry = next((entry for entry in reader.get_entries() if entry.id == unquoted_entry_id), None)
+
     if entry is None:
         return HTMLResponse(status_code=404, content=f"Entry '{entry_id}' not found.")
 
-    if result := send_entry_to_discord(entry=entry):
+    if result := send_entry_to_discord(entry=entry, reader=reader):
         return result
 
     # Redirect to the feed page.
-    clean_feed_url: str = entry.feed.url.strip()
-    return RedirectResponse(url=f"/feed?feed_url={urllib.parse.quote(clean_feed_url)}", status_code=303)
+    redirect_feed_url: str = entry.feed.url.strip()
+    return RedirectResponse(url=f"/feed?feed_url={urllib.parse.quote(redirect_feed_url)}", status_code=303)
 
 
 @app.post("/modify_webhook", response_class=HTMLResponse)
-def modify_webhook(old_hook: Annotated[str, Form()], new_hook: Annotated[str, Form()]):
+def modify_webhook(
+    old_hook: Annotated[str, Form()],
+    new_hook: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+    redirect_to: Annotated[str, Form()] = "",
+):
     """Modify a webhook.
 
     Args:
         old_hook: The webhook to modify.
         new_hook: The new webhook.
+        redirect_to: Optional redirect URL after the update.
+        reader: The Reader instance.
 
     Returns:
         RedirectResponse: Redirect to the webhook page.
@@ -1356,15 +1497,20 @@ def modify_webhook(old_hook: Annotated[str, Form()], new_hook: Annotated[str, Fo
     # Webhooks are stored as a list of dictionaries.
     # Example: [{"name": "webhook_name", "url": "webhook_url"}]
     webhooks = cast("list[dict[str, str]]", webhooks)
+    old_hook_clean: str = old_hook.strip()
+    new_hook_clean: str = new_hook.strip()
+    webhook_modified: bool = False
 
     for hook in webhooks:
-        if hook["url"] in old_hook.strip():
-            hook["url"] = new_hook.strip()
+        if hook["url"] in old_hook_clean:
+            hook["url"] = new_hook_clean
 
             # Check if it has been modified.
-            if hook["url"] != new_hook.strip():
+            if hook["url"] != new_hook_clean:
                 raise HTTPException(status_code=500, detail="Webhook could not be modified")
 
+            webhook_modified = True
+
             # Add our new list of webhooks to the database.
             reader.set_tag((), "webhooks", webhooks)  # pyright: ignore[reportArgumentType]
 
@@ -1372,16 +1518,21 @@ def modify_webhook(old_hook: Annotated[str, Form()], new_hook: Annotated[str, Fo
             # matches the old one.
             feeds: Iterable[Feed] = reader.get_feeds()
             for feed in feeds:
-                try:
-                    webhook = reader.get_tag(feed, "webhook")
-                except TagNotFoundError:
-                    continue
+                webhook: str = str(reader.get_tag(feed, "webhook", ""))
 
-                if webhook == old_hook.strip():
-                    reader.set_tag(feed.url, "webhook", new_hook.strip())  # pyright: ignore[reportArgumentType]
+                if webhook == old_hook_clean:
+                    reader.set_tag(feed.url, "webhook", new_hook_clean)  # pyright: ignore[reportArgumentType]
 
-    # Redirect to the webhook page.
-    return RedirectResponse(url="/webhooks", status_code=303)
+    if webhook_modified and old_hook_clean != new_hook_clean:
+        commit_state_change(reader, f"Modify webhook URL from {old_hook_clean} to {new_hook_clean}")
+
+    redirect_url: str = redirect_to.strip() or "/webhooks"
+    if redirect_to:
+        redirect_url = redirect_url.replace(urllib.parse.quote(old_hook_clean), urllib.parse.quote(new_hook_clean))
+        redirect_url = redirect_url.replace(old_hook_clean, new_hook_clean)
+
+    # Redirect to the requested page.
+    return RedirectResponse(url=redirect_url, status_code=303)
 
 
 def extract_youtube_video_id(url: str) -> str | None:
@@ -1407,11 +1558,216 @@ def extract_youtube_video_id(url: str) -> str | None:
     return None
 
 
-@app.get("/webhook_entries", response_class=HTMLResponse)
-async def get_webhook_entries(  # noqa: C901, PLR0912, PLR0914
+def resolve_final_feed_url(url: str) -> tuple[str, str | None]:
+    """Resolve a feed URL by following redirects.
+
+    Args:
+        url: The feed URL to resolve.
+
+    Returns:
+        tuple[str, str | None]: A tuple with (resolved_url, error_message).
+        error_message is None when resolution succeeded.
+    """
+    clean_url: str = url.strip()
+    if not clean_url:
+        return "", "URL is empty"
+
+    if not is_url_valid(clean_url):
+        return clean_url, "URL is invalid"
+
+    try:
+        response: Response = httpx.get(clean_url, follow_redirects=True, timeout=10.0)
+    except httpx.HTTPError as e:
+        return clean_url, str(e)
+
+    if not response.is_success:
+        return clean_url, f"HTTP {response.status_code}"
+
+    return str(response.url), None
+
+
+def create_webhook_feed_url_preview(
+    webhook_feeds: list[Feed],
+    replace_from: str,
+    replace_to: str,
+    resolve_urls: bool,  # noqa: FBT001
+    force_update: bool = False,  # noqa: FBT001, FBT002
+    existing_feed_urls: set[str] | None = None,
+) -> list[dict[str, str | bool | None]]:
+    """Create preview rows for bulk feed URL replacement.
+
+    Args:
+        webhook_feeds: Feeds attached to a webhook.
+        replace_from: Text to replace in each URL.
+        replace_to: Replacement text.
+        resolve_urls: Whether to resolve resulting URLs via HTTP redirects.
+        force_update: Whether conflicts should be marked as force-overwritable.
+        existing_feed_urls: Optional set of all tracked feed URLs used for conflict detection.
+
+    Returns:
+        list[dict[str, str | bool | None]]: Rows used in the preview table.
+    """
+    known_feed_urls: set[str] = existing_feed_urls or {feed.url for feed in webhook_feeds}
+    preview_rows: list[dict[str, str | bool | None]] = []
+    for feed in webhook_feeds:
+        old_url: str = feed.url
+        has_match: bool = bool(replace_from and replace_from in old_url)
+
+        candidate_url: str = old_url
+        if has_match:
+            candidate_url = old_url.replace(replace_from, replace_to)
+
+        resolved_url: str = candidate_url
+        resolution_error: str | None = None
+        if has_match and candidate_url != old_url and resolve_urls:
+            resolved_url, resolution_error = resolve_final_feed_url(candidate_url)
+
+        will_force_ignore_errors: bool = bool(
+            force_update and bool(resolution_error) and has_match and old_url != candidate_url,
+        )
+
+        target_exists: bool = bool(
+            has_match and not resolution_error and resolved_url != old_url and resolved_url in known_feed_urls,
+        )
+        will_force_overwrite: bool = bool(target_exists and force_update)
+        will_change: bool = bool(
+            has_match
+            and old_url != (candidate_url if will_force_ignore_errors else resolved_url)
+            and (not target_exists or will_force_overwrite)
+            and (not resolution_error or will_force_ignore_errors),
+        )
+
+        preview_rows.append({
+            "old_url": old_url,
+            "candidate_url": candidate_url,
+            "resolved_url": resolved_url,
+            "has_match": has_match,
+            "will_change": will_change,
+            "target_exists": target_exists,
+            "will_force_overwrite": will_force_overwrite,
+            "will_force_ignore_errors": will_force_ignore_errors,
+            "resolution_error": resolution_error,
+        })
+
+    return preview_rows
+
+
+def build_webhook_mass_update_context(
+    webhook_feeds: list[Feed],
+    all_feeds: list[Feed],
+    replace_from: str,
+    replace_to: str,
+    resolve_urls: bool,  # noqa: FBT001
+    force_update: bool = False,  # noqa: FBT001, FBT002
+) -> dict[str, str | bool | int | list[dict[str, str | bool | None]] | dict[str, int]]:
+    """Build context data used by the webhook mass URL update preview UI.
+
+    Args:
+        webhook_feeds: Feeds attached to the selected webhook.
+        all_feeds: All tracked feeds.
+        replace_from: Text to replace in URLs.
+        replace_to: Replacement text.
+        resolve_urls: Whether to resolve resulting URLs.
+        force_update: Whether to allow overwriting existing target URLs.
+
+    Returns:
+        dict[str, ...]: Context values for rendering preview controls and table.
+    """
+    clean_replace_from: str = replace_from.strip()
+    clean_replace_to: str = replace_to.strip()
+
+    preview_rows: list[dict[str, str | bool | None]] = []
+    if clean_replace_from:
+        preview_rows = create_webhook_feed_url_preview(
+            webhook_feeds=webhook_feeds,
+            replace_from=clean_replace_from,
+            replace_to=clean_replace_to,
+            resolve_urls=resolve_urls,
+            force_update=force_update,
+            existing_feed_urls={feed.url for feed in all_feeds},
+        )
+
+    preview_summary: dict[str, int] = {
+        "total": len(preview_rows),
+        "matched": sum(1 for row in preview_rows if row["has_match"]),
+        "will_update": sum(1 for row in preview_rows if row["will_change"]),
+        "conflicts": sum(1 for row in preview_rows if row["target_exists"] and not row["will_force_overwrite"]),
+        "force_overwrite": sum(1 for row in preview_rows if row["will_force_overwrite"]),
+        "force_ignore_errors": sum(1 for row in preview_rows if row["will_force_ignore_errors"]),
+        "resolve_errors": sum(1 for row in preview_rows if row["resolution_error"]),
+    }
+    preview_summary["no_match"] = preview_summary["total"] - preview_summary["matched"]
+    preview_summary["no_change"] = sum(
+        1 for row in preview_rows if row["has_match"] and not row["resolution_error"] and not row["will_change"]
+    )
+
+    return {
+        "replace_from": clean_replace_from,
+        "replace_to": clean_replace_to,
+        "resolve_urls": resolve_urls,
+        "force_update": force_update,
+        "preview_rows": preview_rows,
+        "preview_summary": preview_summary,
+        "preview_change_count": preview_summary["will_update"],
+    }
+
+
+@app.get("/webhook_entries_mass_update_preview", response_class=HTMLResponse)
+async def get_webhook_entries_mass_update_preview(
     webhook_url: str,
     request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+    replace_from: str = "",
+    replace_to: str = "",
+    resolve_urls: bool = True,  # noqa: FBT001, FBT002
+    force_update: bool = False,  # noqa: FBT001, FBT002
+) -> HTMLResponse:
+    """Render the mass-update preview fragment for a webhook using HTMX.
+
+    Args:
+        webhook_url: Webhook URL whose feeds are being updated.
+        request: The request object.
+        reader: The Reader instance.
+        replace_from: Text to find in URLs.
+        replace_to: Replacement text.
+        resolve_urls: Whether to resolve resulting URLs.
+        force_update: Whether to allow overwriting existing target URLs.
+
+    Returns:
+        HTMLResponse: Rendered partial template containing summary + preview table.
+    """
+    clean_webhook_url: str = urllib.parse.unquote(webhook_url.strip())
+    all_feeds: list[Feed] = list(reader.get_feeds())
+    webhook_feeds: list[Feed] = [
+        feed for feed in all_feeds if str(reader.get_tag(feed.url, "webhook", "")) == clean_webhook_url
+    ]
+
+    context = {
+        "request": request,
+        "webhook_url": clean_webhook_url,
+        **build_webhook_mass_update_context(
+            webhook_feeds=webhook_feeds,
+            all_feeds=all_feeds,
+            replace_from=replace_from,
+            replace_to=replace_to,
+            resolve_urls=resolve_urls,
+            force_update=force_update,
+        ),
+    }
+    return templates.TemplateResponse(request=request, name="_webhook_mass_update_preview.html", context=context)
+
+
+@app.get("/webhook_entries", response_class=HTMLResponse)
+async def get_webhook_entries(  # noqa: C901, PLR0914
+    webhook_url: str,
+    request: Request,
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
     starting_after: str = "",
+    replace_from: str = "",
+    replace_to: str = "",
+    resolve_urls: bool = True,  # noqa: FBT001, FBT002
+    force_update: bool = False,  # noqa: FBT001, FBT002
+    message: str = "",
 ) -> HTMLResponse:
     """Get all latest entries from all feeds for a specific webhook.
 
@@ -1419,6 +1775,12 @@ async def get_webhook_entries(  # noqa: C901, PLR0912, PLR0914
         webhook_url: The webhook URL to get entries for.
         request: The request object.
         starting_after: The entry to start after. Used for pagination.
+        replace_from: Optional URL substring to find for bulk URL replacement preview.
+        replace_to: Optional replacement substring used in bulk URL replacement preview.
+        resolve_urls: Whether to resolve replaced URLs by following redirects.
+        force_update: Whether to allow overwriting existing target URLs during apply.
+        message: Optional status message shown in the UI.
+        reader: The Reader instance.
 
     Returns:
         HTMLResponse: The webhook entries page.
@@ -1440,24 +1802,26 @@ async def get_webhook_entries(  # noqa: C901, PLR0912, PLR0914
     if not webhook_name:
         raise HTTPException(status_code=404, detail=f"Webhook not found: {clean_webhook_url}")
 
+    hook_info: WebhookInfo = get_data_from_hook_url(hook_name=webhook_name, hook_url=clean_webhook_url)
+
     # Get all feeds associated with this webhook
     all_feeds: list[Feed] = list(reader.get_feeds())
     webhook_feeds: list[Feed] = []
 
     for feed in all_feeds:
-        try:
-            feed_webhook: str = str(reader.get_tag(feed.url, "webhook", ""))
-            if feed_webhook == clean_webhook_url:
-                webhook_feeds.append(feed)
-        except TagNotFoundError:
-            continue
+        feed_webhook: str = str(reader.get_tag(feed.url, "webhook", ""))
+        if feed_webhook == clean_webhook_url:
+            webhook_feeds.append(feed)
 
     # Get all entries from all feeds for this webhook, sorted by published date
     all_entries: list[Entry] = [entry for feed in webhook_feeds for entry in reader.get_entries(feed=feed)]
 
-    # Sort entries by published date (newest first)
+    # Sort entries by published date (newest first), with undated entries last.
     all_entries.sort(
-        key=lambda e: e.published or datetime.now(tz=UTC),
+        key=lambda e: (
+            e.published is not None,
+            e.published or datetime.min.replace(tzinfo=UTC),
+        ),
         reverse=True,
     )
 
@@ -1490,7 +1854,16 @@ async def get_webhook_entries(  # noqa: C901, PLR0912, PLR0914
         last_entry = paginated_entries[-1]
 
     # Create the html for the entries
-    html: str = create_html_for_feed(paginated_entries)
+    html: str = create_html_for_feed(reader=reader, entries=paginated_entries)
+
+    mass_update_context = build_webhook_mass_update_context(
+        webhook_feeds=webhook_feeds,
+        all_feeds=all_feeds,
+        replace_from=replace_from,
+        replace_to=replace_to,
+        resolve_urls=resolve_urls,
+        force_update=force_update,
+    )
 
     # Check if there are more entries available
     total_entries: int = len(all_entries)
@@ -1498,18 +1871,155 @@ async def get_webhook_entries(  # noqa: C901, PLR0912, PLR0914
 
     context = {
         "request": request,
+        "hook_info": hook_info,
         "webhook_name": webhook_name,
         "webhook_url": clean_webhook_url,
+        "webhook_feeds": webhook_feeds,
         "entries": paginated_entries,
         "html": html,
         "last_entry": last_entry,
         "is_show_more_entries_button_visible": is_show_more_entries_button_visible,
         "total_entries": total_entries,
         "feeds_count": len(webhook_feeds),
+        "message": urllib.parse.unquote(message) if message else "",
+        **mass_update_context,
     }
     return templates.TemplateResponse(request=request, name="webhook_entries.html", context=context)
 
 
+@app.post("/bulk_change_feed_urls", response_class=HTMLResponse)
+async def post_bulk_change_feed_urls(  # noqa: C901, PLR0914, PLR0912, PLR0915
+    webhook_url: Annotated[str, Form()],
+    replace_from: Annotated[str, Form()],
+    reader: Annotated[Reader, Depends(get_reader_dependency)],
+    replace_to: Annotated[str, Form()] = "",
+    resolve_urls: Annotated[bool, Form()] = True,  # noqa: FBT002
+    force_update: Annotated[bool, Form()] = False,  # noqa: FBT002
+) -> RedirectResponse:
+    """Bulk-change feed URLs attached to a webhook.
+
+    Args:
+        webhook_url: The webhook URL whose feeds should be updated.
+        replace_from: Text to find in each URL.
+        replace_to: Text to replace with.
+        resolve_urls: Whether to resolve resulting URLs via redirects.
+        force_update: Whether existing target feed URLs should be overwritten.
+        reader: The Reader instance.
+
+    Returns:
+        RedirectResponse: Redirect to webhook detail with status message.
+
+    Raises:
+        HTTPException: If webhook is missing or replace_from is empty.
+    """
+    clean_webhook_url: str = urllib.parse.unquote(webhook_url.strip())
+    clean_replace_from: str = replace_from.strip()
+    clean_replace_to: str = replace_to.strip()
+
+    if not clean_replace_from:
+        raise HTTPException(status_code=400, detail="replace_from cannot be empty")
+
+    webhooks: list[dict[str, str]] = cast("list[dict[str, str]]", list(reader.get_tag((), "webhooks", [])))
+    if not any(hook["url"] == clean_webhook_url for hook in webhooks):
+        raise HTTPException(status_code=404, detail=f"Webhook not found: {clean_webhook_url}")
+
+    all_feeds: list[Feed] = list(reader.get_feeds())
+    webhook_feeds: list[Feed] = []
+    for feed in all_feeds:
+        feed_webhook: str = str(reader.get_tag(feed.url, "webhook", ""))
+        if feed_webhook == clean_webhook_url:
+            webhook_feeds.append(feed)
+
+    preview_rows: list[dict[str, str | bool | None]] = create_webhook_feed_url_preview(
+        webhook_feeds=webhook_feeds,
+        replace_from=clean_replace_from,
+        replace_to=clean_replace_to,
+        resolve_urls=resolve_urls,
+        force_update=force_update,
+        existing_feed_urls={feed.url for feed in all_feeds},
+    )
+
+    changed_count: int = 0
+    skipped_count: int = 0
+    failed_count: int = 0
+    conflict_count: int = 0
+    force_overwrite_count: int = 0
+
+    for row in preview_rows:
+        if not row["has_match"]:
+            continue
+
+        if row["resolution_error"] and not force_update:
+            skipped_count += 1
+            continue
+
+        if row["target_exists"] and not force_update:
+            conflict_count += 1
+            skipped_count += 1
+            continue
+
+        old_url: str = str(row["old_url"])
+        new_url: str = str(row["candidate_url"] if row["will_force_ignore_errors"] else row["resolved_url"])
+
+        if old_url == new_url:
+            skipped_count += 1
+            continue
+
+        if row["target_exists"] and force_update:
+            try:
+                reader.delete_feed(new_url)
+                force_overwrite_count += 1
+            except FeedNotFoundError:
+                pass
+            except ReaderError:
+                failed_count += 1
+                continue
+
+        try:
+            reader.change_feed_url(old_url, new_url)
+        except FeedExistsError:
+            skipped_count += 1
+            continue
+        except FeedNotFoundError:
+            skipped_count += 1
+            continue
+        except ReaderError:
+            failed_count += 1
+            continue
+
+        try:
+            reader.update_feed(new_url)
+        except Exception:
+            logger.exception("Failed to update feed after URL change: %s", new_url)
+
+        for entry in reader.get_entries(feed=new_url, read=False):
+            try:
+                reader.set_entry_read(entry, True)
+            except Exception:
+                logger.exception("Failed to mark entry as read after URL change: %s", entry.id)
+
+        changed_count += 1
+
+    if changed_count > 0:
+        commit_state_change(
+            reader,
+            f"Bulk change {changed_count} feed URL(s) for webhook {clean_webhook_url}",
+        )
+
+    status_message: str = (
+        f"Updated {changed_count} feed URL(s). "
+        f"Force overwrote {force_overwrite_count}. "
+        f"Conflicts {conflict_count}. "
+        f"Skipped {skipped_count}. "
+        f"Failed {failed_count}."
+    )
+    redirect_url: str = (
+        f"/webhook_entries?webhook_url={urllib.parse.quote(clean_webhook_url)}"
+        f"&message={urllib.parse.quote(status_message)}"
+    )
+    return RedirectResponse(url=redirect_url, status_code=303)
+
+
 if __name__ == "__main__":
     sentry_sdk.init(
         dsn="https://6e77a0d7acb9c7ea22e85a375e0ff1f4@o4505228040339456.ingest.us.sentry.io/4508792887967744",
diff --git a/discord_rss_bot/missing_tags.py b/discord_rss_bot/missing_tags.py
deleted file mode 100644
index 589893e..0000000
--- a/discord_rss_bot/missing_tags.py
+++ /dev/null
@@ -1,109 +0,0 @@
-from __future__ import annotations
-
-from reader import Feed
-from reader import Reader
-from reader import TagNotFoundError
-
-from discord_rss_bot.settings import default_custom_embed
-from discord_rss_bot.settings import default_custom_message
-
-
-def add_custom_message(reader: Reader, feed: Feed) -> None:
-    """Add the custom message tag to the feed if it doesn't exist.
-
-    Args:
-        reader: What Reader to use.
-        feed: The feed to add the tag to.
-    """
-    try:
-        reader.get_tag(feed, "custom_message")
-    except TagNotFoundError:
-        reader.set_tag(feed.url, "custom_message", default_custom_message)  # pyright: ignore[reportArgumentType]
-        reader.set_tag(feed.url, "has_custom_message", True)  # pyright: ignore[reportArgumentType]
-
-
-def add_has_custom_message(reader: Reader, feed: Feed) -> None:
-    """Add the has_custom_message tag to the feed if it doesn't exist.
-
-    Args:
-        reader: What Reader to use.
-        feed: The feed to add the tag to.
-    """
-    try:
-        reader.get_tag(feed, "has_custom_message")
-    except TagNotFoundError:
-        if reader.get_tag(feed, "custom_message") == default_custom_message:
-            reader.set_tag(feed.url, "has_custom_message", False)  # pyright: ignore[reportArgumentType]
-        else:
-            reader.set_tag(feed.url, "has_custom_message", True)  # pyright: ignore[reportArgumentType]
-
-
-def add_if_embed(reader: Reader, feed: Feed) -> None:
-    """Add the if_embed tag to the feed if it doesn't exist.
-
-    Args:
-        reader: What Reader to use.
-        feed: The feed to add the tag to.
-    """
-    try:
-        reader.get_tag(feed, "if_embed")
-    except TagNotFoundError:
-        reader.set_tag(feed.url, "if_embed", True)  # pyright: ignore[reportArgumentType]
-
-
-def add_custom_embed(reader: Reader, feed: Feed) -> None:
-    """Add the custom embed tag to the feed if it doesn't exist.
-
-    Args:
-        reader: What Reader to use.
-        feed: The feed to add the tag to.
-    """
-    try:
-        reader.get_tag(feed, "embed")
-    except TagNotFoundError:
-        reader.set_tag(feed.url, "embed", default_custom_embed)  # pyright: ignore[reportArgumentType]
-        reader.set_tag(feed.url, "has_custom_embed", True)  # pyright: ignore[reportArgumentType]
-
-
-def add_has_custom_embed(reader: Reader, feed: Feed) -> None:
-    """Add the has_custom_embed tag to the feed if it doesn't exist.
-
-    Args:
-        reader: What Reader to use.
-        feed: The feed to add the tag to.
-    """
-    try:
-        reader.get_tag(feed, "has_custom_embed")
-    except TagNotFoundError:
-        if reader.get_tag(feed, "embed") == default_custom_embed:
-            reader.set_tag(feed.url, "has_custom_embed", False)  # pyright: ignore[reportArgumentType]
-        else:
-            reader.set_tag(feed.url, "has_custom_embed", True)  # pyright: ignore[reportArgumentType]
-
-
-def add_should_send_embed(reader: Reader, feed: Feed) -> None:
-    """Add the should_send_embed tag to the feed if it doesn't exist.
-
-    Args:
-        reader: What Reader to use.
-        feed: The feed to add the tag to.
-    """
-    try:
-        reader.get_tag(feed, "should_send_embed")
-    except TagNotFoundError:
-        reader.set_tag(feed.url, "should_send_embed", True)  # pyright: ignore[reportArgumentType]
-
-
-def add_missing_tags(reader: Reader) -> None:
-    """Add missing tags to feeds.
-
-    Args:
-        reader: What Reader to use.
-    """
-    for feed in reader.get_feeds():
-        add_custom_message(reader, feed)
-        add_has_custom_message(reader, feed)
-        add_if_embed(reader, feed)
-        add_custom_embed(reader, feed)
-        add_has_custom_embed(reader, feed)
-        add_should_send_embed(reader, feed)
diff --git a/discord_rss_bot/search.py b/discord_rss_bot/search.py
index a39f304..85129ac 100644
--- a/discord_rss_bot/search.py
+++ b/discord_rss_bot/search.py
@@ -3,8 +3,6 @@ from __future__ import annotations
 import urllib.parse
 from typing import TYPE_CHECKING
 
-from discord_rss_bot.settings import get_reader
-
 if TYPE_CHECKING:
     from collections.abc import Iterable
 
@@ -14,19 +12,16 @@ if TYPE_CHECKING:
     from reader import Reader
 
 
-def create_search_context(query: str, custom_reader: Reader | None = None) -> dict:
+def create_search_context(query: str, reader: Reader) -> dict:
     """Build context for search.html template.
 
-    If custom_reader is None, use the default reader from settings.
-
     Args:
         query (str): The search query.
-        custom_reader (Reader | None): Optional custom Reader instance.
+        reader (Reader): Custom Reader instance.
 
     Returns:
         dict: Context dictionary for rendering the search results.
     """
-    reader: Reader = get_reader() if custom_reader is None else custom_reader
     search_results: Iterable[EntrySearchResult] = reader.search_entries(query)
 
     results: list[dict] = []
diff --git a/discord_rss_bot/settings.py b/discord_rss_bot/settings.py
index e91c3c0..194bf08 100644
--- a/discord_rss_bot/settings.py
+++ b/discord_rss_bot/settings.py
@@ -7,7 +7,6 @@ from pathlib import Path
 
 from platformdirs import user_data_dir
 from reader import Reader
-from reader import TagNotFoundError
 from reader import make_reader
 
 if typing.TYPE_CHECKING:
@@ -48,9 +47,7 @@ def get_reader(custom_location: Path | None = None) -> Reader:
     # https://reader.readthedocs.io/en/latest/api.html#reader.types.UpdateConfig
     # Set the default update interval to 15 minutes if not already configured
     # Users can change this via the Settings page or per-feed in the feed page
-    try:
-        reader.get_tag((), ".reader.update")
-    except TagNotFoundError:
+    if reader.get_tag((), ".reader.update", None) is None:
         # Set default
         reader.set_tag((), ".reader.update", {"interval": 15})
 
diff --git a/discord_rss_bot/templates/_webhook_mass_update_preview.html b/discord_rss_bot/templates/_webhook_mass_update_preview.html
new file mode 100644
index 0000000..a59e97b
--- /dev/null
+++ b/discord_rss_bot/templates/_webhook_mass_update_preview.html
@@ -0,0 +1,73 @@
+{% if preview_rows %}
+    <p class="small text-muted mb-1">
+        {{ preview_change_count }} feed URL{{ 's' if preview_change_count != 1 else '' }} ready to update.
+    </p>
+    <div class="small text-muted mb-2 d-flex flex-wrap gap-2">
+        <span class="badge bg-secondary">Total: {{ preview_summary.total }}</span>
+        <span class="badge bg-info text-dark">Matched: {{ preview_summary.matched }}</span>
+        <span class="badge bg-success">Will update: {{ preview_summary.will_update }}</span>
+        <span class="badge bg-warning text-dark">Conflicts: {{ preview_summary.conflicts }}</span>
+        <span class="badge bg-warning">Force overwrite: {{ preview_summary.force_overwrite }}</span>
+        <span class="badge bg-warning text-dark">Force ignore errors: {{ preview_summary.force_ignore_errors }}</span>
+        <span class="badge bg-danger">Resolve errors: {{ preview_summary.resolve_errors }}</span>
+        <span class="badge bg-secondary">No change: {{ preview_summary.no_change }}</span>
+        <span class="badge bg-secondary">No match: {{ preview_summary.no_match }}</span>
+    </div>
+    <form action="/bulk_change_feed_urls" method="post" class="mb-2">
+        <input type="hidden" name="webhook_url" value="{{ webhook_url }}" />
+        <input type="hidden" name="replace_from" value="{{ replace_from }}" />
+        <input type="hidden" name="replace_to" value="{{ replace_to }}" />
+        <input type="hidden"
+               name="resolve_urls"
+               value="{{ 'true' if resolve_urls else 'false' }}" />
+        <input type="hidden"
+               name="force_update"
+               value="{{ 'true' if force_update else 'false' }}" />
+        <button type="submit"
+                class="btn btn-warning w-100"
+                {% if preview_change_count == 0 %}disabled{% endif %}
+                onclick="return confirm('Apply these feed URL updates?');">Apply mass update</button>
+    </form>
+    <div class="table-responsive mt-2">
+        <table class="table table-sm table-dark table-striped align-middle mb-0">
+            <thead>
+                <tr>
+                    <th scope="col">Old URL</th>
+                    <th scope="col">New URL</th>
+                    <th scope="col">Status</th>
+                </tr>
+            </thead>
+            <tbody>
+                {% for row in preview_rows %}
+                    <tr>
+                        <td>
+                            <code>{{ row.old_url }}</code>
+                        </td>
+                        <td>
+                            <code>{{ row.resolved_url if resolve_urls else row.candidate_url }}</code>
+                        </td>
+                        <td>
+                            {% if not row.has_match %}
+                                <span class="badge bg-secondary">No match</span>
+                            {% elif row.will_force_ignore_errors %}
+                                <span class="badge bg-warning text-dark">Will force update (ignore resolve error)</span>
+                            {% elif row.resolution_error %}
+                                <span class="badge bg-danger">{{ row.resolution_error }}</span>
+                            {% elif row.will_force_overwrite %}
+                                <span class="badge bg-warning">Will force overwrite</span>
+                            {% elif row.target_exists %}
+                                <span class="badge bg-warning text-dark">Conflict: target URL exists</span>
+                            {% elif row.will_change %}
+                                <span class="badge bg-success">Will update</span>
+                            {% else %}
+                                <span class="badge bg-secondary">No change</span>
+                            {% endif %}
+                        </td>
+                    </tr>
+                {% endfor %}
+            </tbody>
+        </table>
+    </div>
+{% elif replace_from %}
+    <p class="small text-muted mb-0">No preview rows found for that replacement pattern.</p>
+{% endif %}
diff --git a/discord_rss_bot/templates/base.html b/discord_rss_bot/templates/base.html
index a8640dd..9146b35 100644
--- a/discord_rss_bot/templates/base.html
+++ b/discord_rss_bot/templates/base.html
@@ -1,13 +1,12 @@
 <!DOCTYPE html>
 <html lang="en">
-
     <head>
         <meta charset="UTF-8" />
         <meta name="viewport" content="width=device-width, initial-scale=1" />
         <meta name="description"
-            content="Stay updated with the latest news and events with our easy-to-use RSS bot. Never miss a message or announcement again with real-time notifications directly to your Discord server." />
+              content="Stay updated with the latest news and events with our easy-to-use RSS bot. Never miss a message or announcement again with real-time notifications directly to your Discord server." />
         <meta name="keywords"
-            content="discord, rss, bot, notifications, announcements, updates, real-time, server, messages, news, events, feed." />
+              content="discord, rss, bot, notifications, announcements, updates, real-time, server, messages, news, events, feed." />
         <link href="/static/bootstrap.min.css" rel="stylesheet" />
         <link href="/static/styles.css" rel="stylesheet" />
         <link rel="icon" href="/static/favicon.ico" type="image/x-icon" />
@@ -18,19 +17,20 @@
         {% block head %}
         {% endblock head %}
     </head>
-
     <body class="text-white-50">
         {% include "nav.html" %}
         <div class="p-2 mb-2">
             <div class="container-fluid">
                 <div class="d-grid p-2">
                     {% if messages %}
-                    <div class="alert alert-warning alert-dismissible fade show" role="alert">
-                        <pre>{{ messages }}</pre>
-                        <button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
-                    </div>
+                        <div class="alert alert-warning alert-dismissible fade show" role="alert">
+                            <pre>{{ messages }}</pre>
+                            <button type="button"
+                                    class="btn-close"
+                                    data-bs-dismiss="alert"
+                                    aria-label="Close"></button>
+                        </div>
                     {% endif %}
-
                     {% block content %}
                     {% endblock content %}
                     <footer class="d-flex flex-wrap justify-content-between align-items-center py-3 my-4 border-top">
@@ -41,18 +41,20 @@
                         <ul class="nav col-md-4 justify-content-end">
                             <li class="nav-item">
                                 <a href="https://github.com/TheLovinator1/discord-rss-bot/issues"
-                                    class="nav-link px-2 text-muted">Report an issue</a>
+                                   class="nav-link px-2 text-muted">Report an issue</a>
                             </li>
                             <li class="nav-item">
                                 <a href="https://github.com/TheLovinator1/discord-rss-bot/issues"
-                                    class="nav-link px-2 text-muted">Send feedback</a>
+                                   class="nav-link px-2 text-muted">Send feedback</a>
                             </li>
                         </ul>
                     </footer>
                 </div>
             </div>
         </div>
+        <script src="https://cdn.jsdelivr.net/npm/htmx.org@2.0.8/dist/htmx.min.js"
+                integrity="sha384-/TgkGk7p307TH7EXJDuUlgG3Ce1UVolAOFopFekQkkXihi5u/6OCvVKyz1W+idaz"
+                crossorigin="anonymous"></script>
         <script src="/static/bootstrap.min.js" defer></script>
     </body>
-
 </html>
diff --git a/discord_rss_bot/templates/index.html b/discord_rss_bot/templates/index.html
index 06b8578..341ec38 100644
--- a/discord_rss_bot/templates/index.html
+++ b/discord_rss_bot/templates/index.html
@@ -32,10 +32,10 @@
             {% for hook_from_context in webhooks %}
                 <div class="p-2 mb-3 border border-dark">
                     <div class="d-flex justify-content-between align-items-center mb-3">
-                        <h2 class="h5 mb-0">
-                            <a class="text-muted" href="/webhooks">{{ hook_from_context.name }}</a>
-                        </h2>
-                        <a class="text-muted"
+                        <h2 class="h5 mb-0">{{ hook_from_context.name }}</h2>
+                        <a class="text-muted fs-6 btn btn-outline-light btn-sm ms-auto me-2"
+                           href="/webhook_entries?webhook_url={{ hook_from_context.url|encode_url }}">Settings</a>
+                        <a class="text-muted fs-6 btn btn-outline-light btn-sm"
                            href="/webhook_entries?webhook_url={{ hook_from_context.url|encode_url }}">View Latest Entries</a>
                     </div>
                     <!-- Group feeds by domain within each webhook -->
diff --git a/discord_rss_bot/templates/webhook_entries.html b/discord_rss_bot/templates/webhook_entries.html
index eb12487..f0bc970 100644
--- a/discord_rss_bot/templates/webhook_entries.html
+++ b/discord_rss_bot/templates/webhook_entries.html
@@ -1,20 +1,149 @@
 {% extends "base.html" %}
 {% block title %}
-    | {{ webhook_name }} - Latest Entries
+    | {{ webhook_name }}
 {% endblock title %}
 {% block content %}
+    {% if message %}<div class="alert alert-info" role="alert">{{ message }}</div>{% endif %}
     <div class="card mb-3 border border-dark p-3 text-light">
-        <!-- Webhook Title -->
-        <h2>{{ webhook_name }} - Latest Entries ({{ total_entries }} total from {{ feeds_count }} feeds)</h2>
-        <!-- Webhook Info -->
-        <div class="mt-3">
-            <p class="text-muted">
-                <code>{{ webhook_url }}</code>
-            </p>
+        <div class="d-flex flex-column flex-md-row justify-content-between gap-3">
+            <div>
+                <h2 class="mb-2">{{ webhook_name }}</h2>
+                <p class="text-muted mb-1">
+                    {{ total_entries }} total from {{ feeds_count }} feed{{ 's' if feeds_count != 1 else '' }}
+                </p>
+                <p class="text-muted mb-0">
+                    <code>{{ webhook_url }}</code>
+                </p>
+            </div>
+            <div class="d-flex gap-2 align-items-start">
+                <a class="btn btn-outline-light btn-sm" href="/">Back to dashboard</a>
+                <a class="btn btn-outline-info btn-sm" href="/webhooks">All webhooks</a>
+            </div>
+        </div>
+    </div>
+    <div class="row g-3 mb-3">
+        <div class="col-lg-5">
+            <div class="card border border-dark p-3 text-light h-100">
+                <h3 class="h5">Settings</h3>
+                <ul class="list-unstyled text-muted mb-3">
+                    <li>
+                        <strong>Custom name:</strong> {{ hook_info.custom_name }}
+                    </li>
+                    <li>
+                        <strong>Discord name:</strong> {{ hook_info.name or 'Unavailable' }}
+                    </li>
+                    <li>
+                        <strong>Webhook:</strong>
+                        <a class="text-muted" href="{{ hook_info.url }}">{{ hook_info.url | replace('https://discord.com/api/webhooks', '') }}</a>
+                    </li>
+                </ul>
+                <form action="/modify_webhook" method="post" class="row g-3 mb-3">
+                    <input type="hidden" name="old_hook" value="{{ webhook_url }}" />
+                    <input type="hidden"
+                           name="redirect_to"
+                           value="/webhook_entries?webhook_url={{ webhook_url|encode_url }}" />
+                    <div class="col-12">
+                        <label for="new_hook" class="form-label">Modify Webhook</label>
+                        <input type="text"
+                               name="new_hook"
+                               id="new_hook"
+                               class="form-control border text-muted bg-dark"
+                               placeholder="Enter new webhook URL" />
+                    </div>
+                    <div class="col-12">
+                        <button type="submit" class="btn btn-primary w-100">Save Webhook URL</button>
+                    </div>
+                </form>
+                <form action="/delete_webhook" method="post">
+                    <input type="hidden" name="webhook_url" value="{{ webhook_url }}" />
+                    <button type="submit"
+                            class="btn btn-danger w-100"
+                            onclick="return confirm('Are you sure you want to delete this webhook?');">
+                        Delete Webhook
+                    </button>
+                </form>
+                <hr class="border-secondary my-3" />
+                <h3 class="h6">Mass update feed URLs</h3>
+                <p class="text-muted small mb-2">Replace part of feed URLs for all feeds attached to this webhook.</p>
+                <form action="/webhook_entries"
+                      method="get"
+                      class="row g-2 mb-2"
+                      hx-get="/webhook_entries_mass_update_preview"
+                      hx-target="#mass-update-preview"
+                      hx-swap="innerHTML">
+                    <input type="hidden" name="webhook_url" value="{{ webhook_url|encode_url }}" />
+                    <div class="col-12">
+                        <label for="replace_from" class="form-label small">Replace this</label>
+                        <input type="text"
+                               name="replace_from"
+                               id="replace_from"
+                               class="form-control border text-muted bg-dark"
+                               value="{{ replace_from }}"
+                               placeholder="https://old-domain.example" />
+                    </div>
+                    <div class="col-12">
+                        <label for="replace_to" class="form-label small">With this</label>
+                        <input type="text"
+                               name="replace_to"
+                               id="replace_to"
+                               class="form-control border text-muted bg-dark"
+                               value="{{ replace_to }}"
+                               placeholder="https://new-domain.example" />
+                    </div>
+                    <div class="col-12 form-check ms-1">
+                        <input class="form-check-input"
+                               type="checkbox"
+                               value="true"
+                               id="resolve_urls"
+                               name="resolve_urls"
+                               {% if resolve_urls %}checked{% endif %} />
+                        <label class="form-check-label small" for="resolve_urls">Resolve final URL with redirects (uses httpx)</label>
+                    </div>
+                    <div class="col-12 form-check ms-1">
+                        <input class="form-check-input"
+                               type="checkbox"
+                               value="true"
+                               id="force_update"
+                               name="force_update"
+                               {% if force_update %}checked{% endif %} />
+                        <label class="form-check-label small" for="force_update">Force update (overwrite conflicting target feed URLs)</label>
+                    </div>
+                    <div class="col-12">
+                        <button type="submit" class="btn btn-outline-warning w-100">Preview changes</button>
+                    </div>
+                </form>
+                <div id="mass-update-preview">{% include "_webhook_mass_update_preview.html" %}</div>
+            </div>
+        </div>
+        <div class="col-lg-7">
+            <div class="card border border-dark p-3 text-light h-100">
+                <h3 class="h5">Attached feeds</h3>
+                {% if webhook_feeds %}
+                    <ul class="list-group list-unstyled mb-0">
+                        {% for feed in webhook_feeds %}
+                            <li class="mb-2">
+                                <a class="text-muted" href="/feed?feed_url={{ feed.url|encode_url }}">
+                                    {% if feed.title %}
+                                        {{ feed.title }}
+                                    {% else %}
+                                        {{ feed.url }}
+                                    {% endif %}
+                                </a>
+                                {% if feed.title %}<span class="text-muted">- {{ feed.url }}</span>{% endif %}
+                                {% if not feed.updates_enabled %}<span class="text-warning">Disabled</span>{% endif %}
+                                {% if feed.last_exception %}<span class="text-danger">({{ feed.last_exception.value_str }})</span>{% endif %}
+                            </li>
+                        {% endfor %}
+                    </ul>
+                {% else %}
+                    <p class="text-muted mb-0">No feeds are attached to this webhook yet.</p>
+                {% endif %}
+            </div>
         </div>
     </div>
     {# Rendered HTML content #}
     {% if entries %}
+        <h3 class="h5 text-light">Latest entries</h3>
         <pre>{{ html|safe }}</pre>
         {% if is_show_more_entries_button_visible and last_entry %}
             <a class="btn btn-dark mt-3"
diff --git a/tests/conftest.py b/tests/conftest.py
index 781c71f..eab2847 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -6,10 +6,24 @@ import sys
 import tempfile
 from contextlib import suppress
 from pathlib import Path
+from typing import TYPE_CHECKING
 from typing import Any
 
+if TYPE_CHECKING:
+    import pytest
 
-def pytest_configure() -> None:
+
+def pytest_addoption(parser: pytest.Parser) -> None:
+    """Register custom command-line options for optional integration tests."""
+    parser.addoption(
+        "--run-real-git-backup-tests",
+        action="store_true",
+        default=False,
+        help="Run tests that push git backup state to a real repository.",
+    )
+
+
+def pytest_sessionstart(session: pytest.Session) -> None:
     """Isolate persistent app state per xdist worker to avoid cross-worker test interference."""
     worker_id: str = os.environ.get("PYTEST_XDIST_WORKER", "gw0")
     worker_data_dir: Path = Path(tempfile.gettempdir()) / "discord-rss-bot-tests" / worker_id
@@ -37,4 +51,10 @@ def pytest_configure() -> None:
                 current_reader.close()
         get_reader: Any = getattr(settings_module, "get_reader", None)
         if callable(get_reader):
-            main_module.reader = get_reader()
+            get_reader()
+
+
+def pytest_collection_modifyitems(config: pytest.Config, items: list[pytest.Item]) -> None:
+    """Skip real git-repo push tests unless explicitly requested."""
+    if config.getoption("--run-real-git-backup-tests"):
+        return
diff --git a/tests/test_blacklist.py b/tests/test_blacklist.py
index 354fdca..0c756ad 100644
--- a/tests/test_blacklist.py
+++ b/tests/test_blacklist.py
@@ -38,7 +38,7 @@ def test_has_black_tags() -> None:
 
     # Test feed without any blacklist tags
     assert_msg: str = "Feed should not have any blacklist tags"
-    assert feed_has_blacklist_tags(custom_reader=get_reader(), feed=feed) is False, assert_msg
+    assert feed_has_blacklist_tags(reader=get_reader(), feed=feed) is False, assert_msg
 
     check_if_has_tag(reader, feed, "blacklist_title")
     check_if_has_tag(reader, feed, "blacklist_summary")
@@ -58,11 +58,11 @@ def test_has_black_tags() -> None:
 def check_if_has_tag(reader: Reader, feed: Feed, blacklist_name: str) -> None:
     reader.set_tag(feed, blacklist_name, "a")  # pyright: ignore[reportArgumentType]
     assert_msg: str = f"Feed should have blacklist tags: {blacklist_name}"
-    assert feed_has_blacklist_tags(custom_reader=reader, feed=feed) is True, assert_msg
+    assert feed_has_blacklist_tags(reader=reader, feed=feed) is True, assert_msg
 
     asset_msg: str = f"Feed should not have any blacklist tags: {blacklist_name}"
     reader.delete_tag(feed, blacklist_name)
-    assert feed_has_blacklist_tags(custom_reader=reader, feed=feed) is False, asset_msg
+    assert feed_has_blacklist_tags(reader=reader, feed=feed) is False, asset_msg
 
 
 def test_should_be_skipped() -> None:
diff --git a/tests/test_custom_filter.py b/tests/test_custom_filter.py
index 5538608..9611698 100644
--- a/tests/test_custom_filter.py
+++ b/tests/test_custom_filter.py
@@ -45,39 +45,39 @@ def test_entry_is_whitelisted() -> None:
         Path.mkdir(Path(temp_dir), exist_ok=True)
 
         custom_loc: pathlib.Path = pathlib.Path(temp_dir, "custom_loc_db.sqlite")
-        custom_reader: Reader = get_reader(custom_location=str(custom_loc))
+        reader: Reader = get_reader(custom_location=str(custom_loc))
 
         # Add a feed to the database.
-        custom_reader.add_feed("https://lovinator.space/rss_test.xml")
-        custom_reader.update_feed("https://lovinator.space/rss_test.xml")
+        reader.add_feed("https://lovinator.space/rss_test.xml")
+        reader.update_feed("https://lovinator.space/rss_test.xml")
 
         # whitelist_title
-        custom_reader.set_tag("https://lovinator.space/rss_test.xml", "whitelist_title", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
-        for entry in custom_reader.get_entries():
-            if entry_is_whitelisted(entry) is True:
+        reader.set_tag("https://lovinator.space/rss_test.xml", "whitelist_title", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
+        for entry in reader.get_entries():
+            if entry_is_whitelisted(entry, reader=reader) is True:
                 assert entry.title == "fvnnnfnfdnfdnfd", f"Expected: fvnnnfnfdnfdnfd, Got: {entry.title}"
                 break
-        custom_reader.delete_tag("https://lovinator.space/rss_test.xml", "whitelist_title")
+        reader.delete_tag("https://lovinator.space/rss_test.xml", "whitelist_title")
 
         # whitelist_summary
-        custom_reader.set_tag("https://lovinator.space/rss_test.xml", "whitelist_summary", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
-        for entry in custom_reader.get_entries():
-            if entry_is_whitelisted(entry) is True:
+        reader.set_tag("https://lovinator.space/rss_test.xml", "whitelist_summary", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
+        for entry in reader.get_entries():
+            if entry_is_whitelisted(entry, reader=reader) is True:
                 assert entry.summary == "fvnnnfnfdnfdnfd", f"Expected: fvnnnfnfdnfdnfd, Got: {entry.summary}"
                 break
-        custom_reader.delete_tag("https://lovinator.space/rss_test.xml", "whitelist_summary")
+        reader.delete_tag("https://lovinator.space/rss_test.xml", "whitelist_summary")
 
         # whitelist_content
-        custom_reader.set_tag("https://lovinator.space/rss_test.xml", "whitelist_content", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
-        for entry in custom_reader.get_entries():
-            if entry_is_whitelisted(entry) is True:
+        reader.set_tag("https://lovinator.space/rss_test.xml", "whitelist_content", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
+        for entry in reader.get_entries():
+            if entry_is_whitelisted(entry, reader=reader) is True:
                 assert_msg = f"Expected: <p>ffdnfdnfdnfdnfdndfn</p>, Got: {entry.content[0].value}"
                 assert entry.content[0].value == "<p>ffdnfdnfdnfdnfdndfn</p>", assert_msg
                 break
-        custom_reader.delete_tag("https://lovinator.space/rss_test.xml", "whitelist_content")
+        reader.delete_tag("https://lovinator.space/rss_test.xml", "whitelist_content")
 
         # Close the reader, so we can delete the directory.
-        custom_reader.close()
+        reader.close()
 
 
 def test_entry_is_blacklisted() -> None:
@@ -87,36 +87,36 @@ def test_entry_is_blacklisted() -> None:
         Path.mkdir(Path(temp_dir), exist_ok=True)
 
         custom_loc: pathlib.Path = pathlib.Path(temp_dir, "custom_loc_db.sqlite")
-        custom_reader: Reader = get_reader(custom_location=str(custom_loc))
+        reader: Reader = get_reader(custom_location=str(custom_loc))
 
         # Add a feed to the database.
-        custom_reader.add_feed("https://lovinator.space/rss_test.xml")
-        custom_reader.update_feed("https://lovinator.space/rss_test.xml")
+        reader.add_feed("https://lovinator.space/rss_test.xml")
+        reader.update_feed("https://lovinator.space/rss_test.xml")
 
         # blacklist_title
-        custom_reader.set_tag("https://lovinator.space/rss_test.xml", "blacklist_title", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
-        for entry in custom_reader.get_entries():
-            if entry_is_blacklisted(entry) is True:
+        reader.set_tag("https://lovinator.space/rss_test.xml", "blacklist_title", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
+        for entry in reader.get_entries():
+            if entry_is_blacklisted(entry, reader=reader) is True:
                 assert entry.title == "fvnnnfnfdnfdnfd", f"Expected: fvnnnfnfdnfdnfd, Got: {entry.title}"
                 break
-        custom_reader.delete_tag("https://lovinator.space/rss_test.xml", "blacklist_title")
+        reader.delete_tag("https://lovinator.space/rss_test.xml", "blacklist_title")
 
         # blacklist_summary
-        custom_reader.set_tag("https://lovinator.space/rss_test.xml", "blacklist_summary", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
-        for entry in custom_reader.get_entries():
-            if entry_is_blacklisted(entry) is True:
+        reader.set_tag("https://lovinator.space/rss_test.xml", "blacklist_summary", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
+        for entry in reader.get_entries():
+            if entry_is_blacklisted(entry, reader=reader) is True:
                 assert entry.summary == "fvnnnfnfdnfdnfd", f"Expected: fvnnnfnfdnfdnfd, Got: {entry.summary}"
                 break
-        custom_reader.delete_tag("https://lovinator.space/rss_test.xml", "blacklist_summary")
+        reader.delete_tag("https://lovinator.space/rss_test.xml", "blacklist_summary")
 
         # blacklist_content
-        custom_reader.set_tag("https://lovinator.space/rss_test.xml", "blacklist_content", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
-        for entry in custom_reader.get_entries():
-            if entry_is_blacklisted(entry) is True:
+        reader.set_tag("https://lovinator.space/rss_test.xml", "blacklist_content", "fvnnnfnfdnfdnfd")  # pyright: ignore[reportArgumentType]
+        for entry in reader.get_entries():
+            if entry_is_blacklisted(entry, reader=reader) is True:
                 assert_msg = f"Expected: <p>ffdnfdnfdnfdnfdndfn</p>, Got: {entry.content[0].value}"
                 assert entry.content[0].value == "<p>ffdnfdnfdnfdnfdndfn</p>", assert_msg
                 break
-        custom_reader.delete_tag("https://lovinator.space/rss_test.xml", "blacklist_content")
+        reader.delete_tag("https://lovinator.space/rss_test.xml", "blacklist_content")
 
         # Close the reader, so we can delete the directory.
-        custom_reader.close()
+        reader.close()
diff --git a/tests/test_custom_message.py b/tests/test_custom_message.py
index 6fc4d41..4b23f45 100644
--- a/tests/test_custom_message.py
+++ b/tests/test_custom_message.py
@@ -102,12 +102,10 @@ def test_format_entry_html_for_discord_does_not_preserve_invalid_timestamp_style
 
 
 @patch("discord_rss_bot.custom_message.get_custom_message")
-@patch("discord_rss_bot.custom_message.get_reader")
 def test_replace_tags_in_text_message_preserves_timestamp_tags(
-    mock_get_reader: MagicMock,
     mock_get_custom_message: MagicMock,
 ) -> None:
-    mock_get_reader.return_value = MagicMock()
+    mock_reader = MagicMock()
     mock_get_custom_message.return_value = "{{entry_summary}}"
     summary_parts: list[str] = [
         f"<p>Format {index}: ({timestamp_tag.replace('<', '&lt;').replace('>', '&gt;')})</p>"
@@ -116,19 +114,17 @@ def test_replace_tags_in_text_message_preserves_timestamp_tags(
     entry_ns: SimpleNamespace = make_entry("".join(summary_parts))
 
     entry: Entry = typing.cast("Entry", entry_ns)
-    rendered: str = replace_tags_in_text_message(entry)
+    rendered: str = replace_tags_in_text_message(entry, reader=mock_reader)
 
     for timestamp_tag in TIMESTAMP_FORMATS:
         assert timestamp_tag in rendered
 
 
 @patch("discord_rss_bot.custom_message.get_embed")
-@patch("discord_rss_bot.custom_message.get_reader")
 def test_replace_tags_in_embed_preserves_timestamp_tags(
-    mock_get_reader: MagicMock,
     mock_get_embed: MagicMock,
 ) -> None:
-    mock_get_reader.return_value = MagicMock()
+    mock_reader = MagicMock()
     mock_get_embed.return_value = CustomEmbed(description="{{entry_summary}}")
     summary_parts: list[str] = [
         f"<p>Format {index}: ({timestamp_tag.replace('<', '&lt;').replace('>', '&gt;')})</p>"
@@ -138,7 +134,7 @@ def test_replace_tags_in_embed_preserves_timestamp_tags(
 
     entry: Entry = typing.cast("Entry", entry_ns)
 
-    embed: CustomEmbed = replace_tags_in_embed(entry_ns.feed, entry)
+    embed: CustomEmbed = replace_tags_in_embed(entry_ns.feed, entry, reader=mock_reader)
 
     for timestamp_tag in TIMESTAMP_FORMATS:
         assert timestamp_tag in embed.description
diff --git a/tests/test_feeds.py b/tests/test_feeds.py
index 2ffe47e..84e836c 100644
--- a/tests/test_feeds.py
+++ b/tests/test_feeds.py
@@ -18,7 +18,6 @@ from discord_rss_bot.feeds import send_entry_to_discord
 from discord_rss_bot.feeds import send_to_discord
 from discord_rss_bot.feeds import should_send_embed_check
 from discord_rss_bot.feeds import truncate_webhook_message
-from discord_rss_bot.missing_tags import add_missing_tags
 
 
 def test_send_to_discord() -> None:
@@ -35,8 +34,6 @@ def test_send_to_discord() -> None:
         # Add a feed to the reader.
         reader.add_feed("https://www.reddit.com/r/Python/.rss")
 
-        add_missing_tags(reader)
-
         # Update the feed to get the entries.
         reader.update_feeds()
 
@@ -58,7 +55,7 @@ def test_send_to_discord() -> None:
         assert reader.get_tag(feed, "webhook") == webhook_url, f"The webhook URL should be '{webhook_url}'."
 
         # Send the feed to Discord.
-        send_to_discord(custom_reader=reader, feed=feed, do_once=True)
+        send_to_discord(reader=reader, feed=feed, do_once=True)
 
         # Close the reader, so we can delete the directory.
         reader.close()
@@ -191,7 +188,7 @@ def test_send_entry_to_discord_youtube_feed(
     mock_discord_webhook.return_value = mock_webhook
 
     # Call the function
-    send_entry_to_discord(mock_entry)
+    send_entry_to_discord(mock_entry, mock_reader)
 
     # Assertions
     mock_create_embed.assert_not_called()
@@ -203,7 +200,7 @@ def test_send_entry_to_discord_youtube_feed(
     assert webhook_call_kwargs["url"] == "https://discord.com/api/webhooks/123/abc"
 
     # Verify execute_webhook was called
-    mock_execute_webhook.assert_called_once_with(mock_webhook, mock_entry)
+    mock_execute_webhook.assert_called_once_with(mock_webhook, mock_entry, reader=mock_reader)
 
 
 def test_extract_domain_youtube_feed() -> None:
diff --git a/tests/test_git_backup.py b/tests/test_git_backup.py
index 0fa6f8e..183d178 100644
--- a/tests/test_git_backup.py
+++ b/tests/test_git_backup.py
@@ -304,102 +304,6 @@ def test_commit_state_change_no_push_when_remote_unset(monkeypatch: pytest.Monke
     assert not push_calls, "git push should NOT be called when GIT_BACKUP_REMOTE is not set"
 
 
-@SKIP_IF_NO_GIT
-def test_commit_state_change_e2e_push_to_bare_repo(monkeypatch: pytest.MonkeyPatch, tmp_path: Path) -> None:
-    """End-to-end test: commit_state_change pushes to a real bare git repository."""
-    git_executable: str | None = shutil.which("git")
-    assert git_executable is not None, "git executable not found"
-
-    # Create a bare remote repository
-    bare_repo_path: Path = tmp_path / "remote.git"
-    subprocess.run([git_executable, "init", "--bare", str(bare_repo_path)], check=True, capture_output=True)  # noqa: S603
-
-    # Configure backup with remote pointing to bare repo
-    backup_path: Path = tmp_path / "backup"
-    monkeypatch.setenv("GIT_BACKUP_PATH", str(backup_path))
-    monkeypatch.setenv("GIT_BACKUP_REMOTE", str(bare_repo_path))
-
-    # Create mock reader with some state
-    mock_reader = MagicMock()
-    feed1 = MagicMock()
-    feed1.url = "https://example.com/feed.rss"
-    mock_reader.get_feeds.return_value = [feed1]
-
-    def get_tag_side_effect(
-        feed_or_key: tuple | str,
-        tag: str | None = None,
-        default: str | None = None,
-    ) -> list[Any] | str | None:
-        if feed_or_key == ():
-            return []
-        if tag == "webhook":
-            return "https://discord.com/api/webhooks/123/abc"
-        return default
-
-    mock_reader.get_tag.side_effect = get_tag_side_effect
-
-    # Perform backup with commit and push
-    commit_state_change(mock_reader, "Initial backup")
-
-    # Verify commit exists in local backup repo
-    result: subprocess.CompletedProcess[str] = subprocess.run(  # noqa: S603
-        [git_executable, "-C", str(backup_path), "log", "--oneline"],
-        capture_output=True,
-        text=True,
-        check=True,
-    )
-    assert "Initial backup" in result.stdout
-
-    # Verify origin remote is configured correctly
-    result = subprocess.run(  # noqa: S603
-        [git_executable, "-C", str(backup_path), "remote", "get-url", "origin"],
-        capture_output=True,
-        text=True,
-        check=True,
-    )
-    assert result.stdout.strip() == str(bare_repo_path)
-
-    # Verify commit was pushed to the bare remote
-    result = subprocess.run(  # noqa: S603
-        [git_executable, "-C", str(bare_repo_path), "log", "--oneline", "master"],
-        capture_output=True,
-        text=True,
-        check=True,
-    )
-    assert "Initial backup" in result.stdout
-
-    # Verify state.json content in the remote
-    result = subprocess.run(  # noqa: S603
-        [git_executable, "-C", str(bare_repo_path), "show", "master:state.json"],
-        capture_output=True,
-        text=True,
-        check=True,
-    )
-    state_data: dict[str, Any] = json.loads(result.stdout)
-    assert state_data["feeds"][0]["url"] == "https://example.com/feed.rss"
-    assert state_data["feeds"][0]["webhook"] == "https://discord.com/api/webhooks/123/abc"
-
-    # Perform a second backup to verify subsequent pushes work
-    feed2 = MagicMock()
-    feed2.url = "https://another.com/feed.xml"
-    mock_reader.get_feeds.return_value = [feed1, feed2]
-
-    commit_state_change(mock_reader, "Add second feed")
-
-    # Verify both commits are in the remote
-    result = subprocess.run(  # noqa: S603
-        [git_executable, "-C", str(bare_repo_path), "log", "--oneline", "master"],
-        capture_output=True,
-        text=True,
-        check=True,
-    )
-    assert "Initial backup" in result.stdout
-    assert "Add second feed" in result.stdout
-
-
-# Integration tests for embed-related endpoint backups
-
-
 client: TestClient = TestClient(app)
 test_webhook_name: str = "Test Backup Webhook"
 test_webhook_url: str = "https://discord.com/api/webhooks/999999999/testbackupwebhook"
diff --git a/tests/test_main.py b/tests/test_main.py
index dc3ecf5..f6396eb 100644
--- a/tests/test_main.py
+++ b/tests/test_main.py
@@ -4,13 +4,19 @@ import re
 import urllib.parse
 from dataclasses import dataclass
 from dataclasses import field
+from datetime import UTC
+from datetime import datetime
 from typing import TYPE_CHECKING
 from typing import cast
+from unittest.mock import MagicMock
+from unittest.mock import patch
 
 from fastapi.testclient import TestClient
 
+import discord_rss_bot.main as main_module
 from discord_rss_bot.main import app
 from discord_rss_bot.main import create_html_for_feed
+from discord_rss_bot.main import get_reader_dependency
 
 if TYPE_CHECKING:
     from pathlib import Path
@@ -154,6 +160,9 @@ def test_get() -> None:
     response: Response = client.get(url="/webhooks")
     assert response.status_code == 200, f"/webhooks failed: {response.text}"
 
+    response = client.get(url="/webhook_entries", params={"webhook_url": webhook_url})
+    assert response.status_code == 200, f"/webhook_entries failed: {response.text}"
+
     response: Response = client.get(url="/whitelist", params={"feed_url": encoded_feed_url(feed_url)})
     assert response.status_code == 200, f"/whitelist failed: {response.text}"
 
@@ -299,6 +308,147 @@ def test_change_feed_url() -> None:
     client.post(url="/remove", data={"feed_url": new_feed_url})
 
 
+def test_change_feed_url_marks_entries_as_read() -> None:
+    """After changing a feed URL all entries on the new feed should be marked read to prevent resending."""
+    new_feed_url = "https://lovinator.space/rss_test_small.xml"
+
+    # Ensure feeds do not already exist.
+    client.post(url="/remove", data={"feed_url": feed_url})
+    client.post(url="/remove", data={"feed_url": new_feed_url})
+
+    # Ensure webhook exists.
+    client.post(url="/delete_webhook", data={"webhook_url": webhook_url})
+    client.post(url="/add_webhook", data={"webhook_name": webhook_name, "webhook_url": webhook_url})
+
+    # Add the original feed.
+    response: Response = client.post(url="/add", data={"feed_url": feed_url, "webhook_dropdown": webhook_name})
+    assert response.status_code == 200, f"Failed to add feed: {response.text}"
+
+    # Patch reader on the main module so we can observe calls.
+    mock_entry_a = MagicMock()
+    mock_entry_a.id = "entry-a"
+    mock_entry_b = MagicMock()
+    mock_entry_b.id = "entry-b"
+
+    real_reader = main_module.get_reader_dependency()
+
+    # Use a no-redirect client so the POST response is inspected directly; the
+    # redirect target (/feed?feed_url=…) would 404 because change_feed_url is mocked.
+    no_redirect_client = TestClient(app, follow_redirects=False)
+
+    with (
+        patch.object(real_reader, "get_entries", return_value=[mock_entry_a, mock_entry_b]) as mock_get_entries,
+        patch.object(real_reader, "set_entry_read") as mock_set_read,
+        patch.object(real_reader, "update_feed") as mock_update_feed,
+        patch.object(real_reader, "change_feed_url"),
+    ):
+        response = no_redirect_client.post(
+            url="/change_feed_url",
+            data={"old_feed_url": feed_url, "new_feed_url": new_feed_url},
+        )
+        assert response.status_code == 303, f"Expected 303 redirect, got {response.status_code}: {response.text}"
+
+        # update_feed should have been called with the new URL.
+        mock_update_feed.assert_called_once_with(new_feed_url)
+
+        # get_entries should have been called to fetch unread entries on the new URL.
+        mock_get_entries.assert_called_once_with(feed=new_feed_url, read=False)
+
+        # Every returned entry should have been marked as read.
+        assert mock_set_read.call_count == 2, f"Expected 2 set_entry_read calls, got {mock_set_read.call_count}"
+        mock_set_read.assert_any_call(mock_entry_a, True)
+        mock_set_read.assert_any_call(mock_entry_b, True)
+
+    # Cleanup.
+    client.post(url="/remove", data={"feed_url": feed_url})
+    client.post(url="/remove", data={"feed_url": new_feed_url})
+
+
+def test_change_feed_url_empty_old_url_returns_400() -> None:
+    """Submitting an empty old_feed_url should return HTTP 400."""
+    response: Response = client.post(
+        url="/change_feed_url",
+        data={"old_feed_url": "   ", "new_feed_url": "https://example.com/feed.xml"},
+    )
+    assert response.status_code == 400, f"Expected 400 for empty old URL, got {response.status_code}"
+
+
+def test_change_feed_url_empty_new_url_returns_400() -> None:
+    """Submitting a blank new_feed_url should return HTTP 400."""
+    response: Response = client.post(
+        url="/change_feed_url",
+        data={"old_feed_url": feed_url, "new_feed_url": "   "},
+    )
+    assert response.status_code == 400, f"Expected 400 for blank new URL, got {response.status_code}"
+
+
+def test_change_feed_url_nonexistent_old_url_returns_404() -> None:
+    """Trying to rename a feed that does not exist should return HTTP 404."""
+    non_existent = "https://does-not-exist.example.com/rss.xml"
+    # Make sure it really is absent.
+    client.post(url="/remove", data={"feed_url": non_existent})
+
+    response: Response = client.post(
+        url="/change_feed_url",
+        data={"old_feed_url": non_existent, "new_feed_url": "https://example.com/new.xml"},
+    )
+    assert response.status_code == 404, f"Expected 404 for non-existent feed, got {response.status_code}"
+
+
+def test_change_feed_url_new_url_already_exists_returns_409() -> None:
+    """Changing to a URL that is already tracked should return HTTP 409."""
+    second_feed_url = "https://lovinator.space/rss_test_small.xml"
+
+    # Ensure both feeds are absent.
+    client.post(url="/remove", data={"feed_url": feed_url})
+    client.post(url="/remove", data={"feed_url": second_feed_url})
+
+    # Ensure webhook exists.
+    client.post(url="/delete_webhook", data={"webhook_url": webhook_url})
+    client.post(url="/add_webhook", data={"webhook_name": webhook_name, "webhook_url": webhook_url})
+
+    # Add both feeds.
+    client.post(url="/add", data={"feed_url": feed_url, "webhook_dropdown": webhook_name})
+    client.post(url="/add", data={"feed_url": second_feed_url, "webhook_dropdown": webhook_name})
+
+    # Try to rename one to the other.
+    response: Response = client.post(
+        url="/change_feed_url",
+        data={"old_feed_url": feed_url, "new_feed_url": second_feed_url},
+    )
+    assert response.status_code == 409, f"Expected 409 when new URL already exists, got {response.status_code}"
+
+    # Cleanup.
+    client.post(url="/remove", data={"feed_url": feed_url})
+    client.post(url="/remove", data={"feed_url": second_feed_url})
+
+
+def test_change_feed_url_same_url_redirects_without_error() -> None:
+    """Changing a feed's URL to itself should redirect cleanly without any error."""
+    # Ensure webhook exists.
+    client.post(url="/delete_webhook", data={"webhook_url": webhook_url})
+    client.post(url="/add_webhook", data={"webhook_name": webhook_name, "webhook_url": webhook_url})
+
+    # Add the feed.
+    client.post(url="/remove", data={"feed_url": feed_url})
+    response: Response = client.post(url="/add", data={"feed_url": feed_url, "webhook_dropdown": webhook_name})
+    assert response.status_code == 200, f"Failed to add feed: {response.text}"
+
+    # Submit the same URL as both old and new.
+    response = client.post(
+        url="/change_feed_url",
+        data={"old_feed_url": feed_url, "new_feed_url": feed_url},
+    )
+    assert response.status_code == 200, f"Expected 200 redirect for same URL, got {response.status_code}"
+
+    # Feed should still be accessible.
+    response = client.get(url="/feed", params={"feed_url": feed_url})
+    assert response.status_code == 200, f"Feed should still exist after no-op URL change: {response.text}"
+
+    # Cleanup.
+    client.post(url="/remove", data={"feed_url": feed_url})
+
+
 def test_delete_webhook() -> None:
     """Test the /delete_webhook page."""
     # Remove the feed if it already exists before we run the test.
@@ -335,6 +485,110 @@ def test_update_feed_not_found() -> None:
     assert "Feed not found" in response.text
 
 
+def test_post_entry_send_to_discord() -> None:
+    """Test that /post_entry sends an entry to Discord and redirects to the feed page.
+
+    Regression test for the bug where the injected reader was not passed to
+    send_entry_to_discord, meaning the dependency-injected reader was silently ignored.
+    """
+    # Ensure webhook and feed exist.
+    client.post(url="/delete_webhook", data={"webhook_url": webhook_url})
+    response: Response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": webhook_name, "webhook_url": webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add webhook: {response.text}"
+
+    client.post(url="/remove", data={"feed_url": feed_url})
+    response = client.post(url="/add", data={"feed_url": feed_url, "webhook_dropdown": webhook_name})
+    assert response.status_code == 200, f"Failed to add feed: {response.text}"
+
+    # Retrieve an entry from the feed to get a valid entry ID.
+    reader: main_module.Reader = main_module.get_reader_dependency()
+    entries: list[Entry] = list(reader.get_entries(feed=feed_url, limit=1))
+    assert entries, "Feed should have at least one entry to send"
+    entry_to_send: main_module.Entry = entries[0]
+    encoded_id: str = urllib.parse.quote(entry_to_send.id)
+
+    no_redirect_client = TestClient(app, follow_redirects=False)
+
+    # Patch execute_webhook so no real HTTP requests are made to Discord.
+    with patch("discord_rss_bot.feeds.execute_webhook") as mock_execute:
+        response = no_redirect_client.get(
+            url="/post_entry",
+            params={"entry_id": encoded_id, "feed_url": urllib.parse.quote(feed_url)},
+        )
+
+    assert response.status_code == 303, f"Expected redirect after sending, got {response.status_code}: {response.text}"
+    location: str = response.headers.get("location", "")
+    assert "feed?feed_url=" in location, f"Should redirect to feed page, got: {location}"
+    assert mock_execute.called, "execute_webhook should have been called to deliver the entry to Discord"
+
+    # Cleanup.
+    client.post(url="/remove", data={"feed_url": feed_url})
+
+
+def test_post_entry_unknown_id_returns_404() -> None:
+    """Test that /post_entry returns 404 when the entry ID does not exist."""
+    response: Response = client.get(
+        url="/post_entry",
+        params={"entry_id": "https://nonexistent.example.com/entry-that-does-not-exist"},
+    )
+    assert response.status_code == 404, f"Expected 404 for unknown entry, got {response.status_code}"
+
+
+def test_post_entry_uses_feed_url_to_disambiguate_duplicate_ids() -> None:
+    """When IDs collide across feeds, /post_entry should pick the entry from provided feed_url."""
+
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+
+    @dataclass(slots=True)
+    class DummyEntry:
+        id: str
+        feed: DummyFeed
+        feed_url: str
+
+    feed_a = "https://example.com/feed-a.xml"
+    feed_b = "https://example.com/feed-b.xml"
+    shared_id = "https://example.com/shared-entry-id"
+
+    entry_a: Entry = cast("Entry", DummyEntry(id=shared_id, feed=DummyFeed(feed_a), feed_url=feed_a))
+    entry_b: Entry = cast("Entry", DummyEntry(id=shared_id, feed=DummyFeed(feed_b), feed_url=feed_b))
+
+    class StubReader:
+        def get_entries(self, feed: str | None = None) -> list[Entry]:
+            if feed == feed_a:
+                return [entry_a]
+            if feed == feed_b:
+                return [entry_b]
+            return [entry_a, entry_b]
+
+    selected_feed_urls: list[str] = []
+
+    def fake_send_entry_to_discord(entry: Entry, reader: object) -> None:
+        selected_feed_urls.append(entry.feed.url)
+
+    app.dependency_overrides[get_reader_dependency] = StubReader
+    no_redirect_client = TestClient(app, follow_redirects=False)
+
+    try:
+        with patch("discord_rss_bot.main.send_entry_to_discord", side_effect=fake_send_entry_to_discord):
+            response: Response = no_redirect_client.get(
+                url="/post_entry",
+                params={"entry_id": urllib.parse.quote(shared_id), "feed_url": urllib.parse.quote(feed_b)},
+            )
+
+        assert response.status_code == 303, f"Expected redirect after sending, got {response.status_code}"
+        assert selected_feed_urls == [feed_b], f"Expected feed-b entry, got: {selected_feed_urls}"
+
+        location = response.headers.get("location", "")
+        assert urllib.parse.quote(feed_b) in location, f"Expected redirect to feed-b page, got: {location}"
+    finally:
+        app.dependency_overrides = {}
+
+
 def test_navbar_backup_link_hidden_when_not_configured(monkeypatch: pytest.MonkeyPatch) -> None:
     """Test that the backup link is not shown in the navbar when GIT_BACKUP_PATH is not set."""
     # Ensure GIT_BACKUP_PATH is not set
@@ -573,11 +827,24 @@ def test_create_html_marks_entries_from_another_feed(monkeypatch: pytest.MonkeyP
         original_feed_url="https://example.com/feed-b.xml",
     )
 
-    monkeypatch.setattr("discord_rss_bot.main.replace_tags_in_text_message", lambda _entry: "Rendered content")
-    monkeypatch.setattr("discord_rss_bot.main.entry_is_blacklisted", lambda _entry: False)
-    monkeypatch.setattr("discord_rss_bot.main.entry_is_whitelisted", lambda _entry: False)
+    monkeypatch.setattr(
+        "discord_rss_bot.main.replace_tags_in_text_message",
+        lambda _entry, **_kwargs: "Rendered content",
+    )
+    monkeypatch.setattr("discord_rss_bot.main.entry_is_blacklisted", lambda _entry, **_kwargs: False)
+    monkeypatch.setattr("discord_rss_bot.main.entry_is_whitelisted", lambda _entry, **_kwargs: False)
 
-    html = create_html_for_feed(cast("list[Entry]", [same_feed_entry, other_feed_entry]), selected_feed_url)
+    same_feed_entry_typed: Entry = cast("Entry", same_feed_entry)
+    other_feed_entry_typed: Entry = cast("Entry", other_feed_entry)
+
+    html: str = create_html_for_feed(
+        reader=MagicMock(),
+        current_feed_url=selected_feed_url,
+        entries=[
+            same_feed_entry_typed,
+            other_feed_entry_typed,
+        ],
+    )
 
     assert "From another feed: https://example.com/feed-b.xml" in html
     assert "From another feed: https://example.com/feed-a.xml" not in html
@@ -620,6 +887,32 @@ def test_webhook_entries_no_feeds() -> None:
     assert "No feeds found" in response.text or "Add feeds" in response.text, "Expected message about no feeds"
 
 
+def test_webhook_entries_no_feeds_still_shows_webhook_settings() -> None:
+    """The webhook detail view should show settings/actions even with no attached feeds."""
+    client.post(url="/delete_webhook", data={"webhook_url": webhook_url})
+    response: Response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": webhook_name, "webhook_url": webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add webhook: {response.text}"
+
+    response = client.get(
+        url="/webhook_entries",
+        params={"webhook_url": webhook_url},
+    )
+
+    assert response.status_code == 200, f"Failed to get /webhook_entries: {response.text}"
+    assert "Settings" in response.text, "Expected settings card on webhook detail view"
+    assert "Modify Webhook" in response.text, "Expected modify form on webhook detail view"
+    assert "Delete Webhook" in response.text, "Expected delete action on webhook detail view"
+    assert "Back to dashboard" in response.text, "Expected dashboard navigation link"
+    assert "All webhooks" in response.text, "Expected all webhooks navigation link"
+    assert f'name="old_hook" value="{webhook_url}"' in response.text, "Expected old_hook hidden input"
+    assert f'value="/webhook_entries?webhook_url={urllib.parse.quote(webhook_url)}"' in response.text, (
+        "Expected modify form to redirect back to the current webhook detail view"
+    )
+
+
 def test_webhook_entries_with_feeds_no_entries() -> None:
     """Test webhook_entries endpoint when webhook has feeds but no entries yet."""
     # Clean up and create fresh webhook
@@ -681,6 +974,38 @@ def test_webhook_entries_with_entries() -> None:
     assert webhook_name in response.text, "Webhook name not found in response"
     # Should show entries (the feed has entries)
     assert "total from" in response.text, "Expected to see entry count"
+    assert "Modify Webhook" in response.text, "Expected webhook settings to be visible"
+    assert "Attached feeds" in response.text, "Expected attached feeds section to be visible"
+
+
+def test_webhook_entries_shows_attached_feed_link() -> None:
+    """The webhook detail view should list attached feeds linking to their feed pages."""
+    client.post(url="/delete_webhook", data={"webhook_url": webhook_url})
+    response: Response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": webhook_name, "webhook_url": webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add webhook: {response.text}"
+
+    client.post(url="/remove", data={"feed_url": feed_url})
+    response = client.post(
+        url="/add",
+        data={"feed_url": feed_url, "webhook_dropdown": webhook_name},
+    )
+    assert response.status_code == 200, f"Failed to add feed: {response.text}"
+
+    response = client.get(
+        url="/webhook_entries",
+        params={"webhook_url": webhook_url},
+    )
+
+    assert response.status_code == 200, f"Failed to get /webhook_entries: {response.text}"
+    assert f"/feed?feed_url={urllib.parse.quote(feed_url)}" in response.text, (
+        "Expected attached feed to link to its feed detail page"
+    )
+    assert "Latest entries" in response.text, "Expected latest entries heading on webhook detail view"
+
+    client.post(url="/remove", data={"feed_url": feed_url})
 
 
 def test_webhook_entries_multiple_feeds() -> None:
@@ -716,6 +1041,75 @@ def test_webhook_entries_multiple_feeds() -> None:
     client.post(url="/remove", data={"feed_url": feed_url})
 
 
+def test_webhook_entries_sort_newest_and_non_null_published_first() -> None:
+    """Webhook entries should be sorted newest-first with published=None entries placed last."""
+
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+        title: str | None = None
+        updates_enabled: bool = True
+        last_exception: None = None
+
+    @dataclass(slots=True)
+    class DummyEntry:
+        id: str
+        feed: DummyFeed
+        published: datetime | None
+
+    dummy_feed = DummyFeed(url="https://example.com/feed.xml", title="Example Feed")
+
+    # Intentionally unsorted input with two dated entries and two undated entries.
+    unsorted_entries: list[Entry] = [
+        cast("Entry", DummyEntry(id="old", feed=dummy_feed, published=datetime(2024, 1, 1, tzinfo=UTC))),
+        cast("Entry", DummyEntry(id="none-1", feed=dummy_feed, published=None)),
+        cast("Entry", DummyEntry(id="new", feed=dummy_feed, published=datetime(2024, 2, 1, tzinfo=UTC))),
+        cast("Entry", DummyEntry(id="none-2", feed=dummy_feed, published=None)),
+    ]
+
+    class StubReader:
+        def get_tag(self, resource: object, key: str, default: object = None) -> object:
+            if resource == () and key == "webhooks":
+                return [{"name": webhook_name, "url": webhook_url}]
+            if key == "webhook" and isinstance(resource, str):
+                return webhook_url
+            return default
+
+        def get_feeds(self) -> list[DummyFeed]:
+            return [dummy_feed]
+
+        def get_entries(self, **_kwargs: object) -> list[Entry]:
+            return unsorted_entries
+
+    observed_order: list[str] = []
+
+    def capture_entries(*, reader: object, entries: list[Entry], current_feed_url: str = "") -> str:
+        del reader, current_feed_url
+        observed_order.extend(entry.id for entry in entries)
+        return ""
+
+    app.dependency_overrides[get_reader_dependency] = StubReader
+    try:
+        with (
+            patch(
+                "discord_rss_bot.main.get_data_from_hook_url",
+                return_value=main_module.WebhookInfo(custom_name=webhook_name, url=webhook_url),
+            ),
+            patch("discord_rss_bot.main.create_html_for_feed", side_effect=capture_entries),
+        ):
+            response: Response = client.get(
+                url="/webhook_entries",
+                params={"webhook_url": webhook_url},
+            )
+
+        assert response.status_code == 200, f"Failed to get /webhook_entries: {response.text}"
+        assert observed_order == ["new", "old", "none-1", "none-2"], (
+            "Expected newest published entries first and published=None entries last"
+        )
+    finally:
+        app.dependency_overrides = {}
+
+
 def test_webhook_entries_pagination() -> None:
     """Test webhook_entries endpoint pagination functionality."""
     # Clean up and create webhook
@@ -783,3 +1177,445 @@ def test_webhook_entries_url_encoding() -> None:
 
     # Clean up
     client.post(url="/remove", data={"feed_url": feed_url})
+
+
+def test_dashboard_webhook_name_links_to_webhook_detail() -> None:
+    """Webhook names on the dashboard should open the webhook detail view."""
+    client.post(url="/delete_webhook", data={"webhook_url": webhook_url})
+    response: Response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": webhook_name, "webhook_url": webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add webhook: {response.text}"
+
+    client.post(url="/remove", data={"feed_url": feed_url})
+    response = client.post(url="/add", data={"feed_url": feed_url, "webhook_dropdown": webhook_name})
+    assert response.status_code == 200, f"Failed to add feed: {response.text}"
+
+    response = client.get(url="/")
+    assert response.status_code == 200, f"Failed to get /: {response.text}"
+
+    expected_link = f"/webhook_entries?webhook_url={urllib.parse.quote(webhook_url)}"
+    assert expected_link in response.text, "Expected dashboard webhook link to point to the webhook detail view"
+
+    client.post(url="/remove", data={"feed_url": feed_url})
+
+
+def test_modify_webhook_redirects_back_to_webhook_detail() -> None:
+    """Webhook updates from the detail view should redirect back to that view with the new URL."""
+    original_webhook_url = "https://discord.com/api/webhooks/1234567890/abcdefghijklmnopqrstuvwxyz"
+    new_webhook_url = "https://discord.com/api/webhooks/1234567890/updated-token"
+
+    client.post(url="/delete_webhook", data={"webhook_url": original_webhook_url})
+    client.post(url="/delete_webhook", data={"webhook_url": new_webhook_url})
+
+
+def test_modify_webhook_triggers_git_backup_commit() -> None:
+    """Modifying a webhook URL should record a state change for git backup."""
+    original_webhook_url = "https://discord.com/api/webhooks/1234567890/abcdefghijklmnopqrstuvwxyz"
+    new_webhook_url = "https://discord.com/api/webhooks/1234567890/updated-token"
+
+    client.post(url="/delete_webhook", data={"webhook_url": original_webhook_url})
+    client.post(url="/delete_webhook", data={"webhook_url": new_webhook_url})
+
+    response: Response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": webhook_name, "webhook_url": original_webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add webhook: {response.text}"
+
+    no_redirect_client = TestClient(app, follow_redirects=False)
+    with patch("discord_rss_bot.main.commit_state_change") as mock_commit_state_change:
+        response = no_redirect_client.post(
+            url="/modify_webhook",
+            data={
+                "old_hook": original_webhook_url,
+                "new_hook": new_webhook_url,
+                "redirect_to": f"/webhook_entries?webhook_url={urllib.parse.quote(original_webhook_url)}",
+            },
+        )
+
+    assert response.status_code == 303, f"Expected 303 redirect, got {response.status_code}: {response.text}"
+    assert mock_commit_state_change.call_count == 1, "Expected webhook modification to trigger git backup commit"
+
+    client.post(url="/delete_webhook", data={"webhook_url": new_webhook_url})
+
+    response = client.post(
+        url="/add_webhook",
+        data={"webhook_name": webhook_name, "webhook_url": original_webhook_url},
+    )
+    assert response.status_code == 200, f"Failed to add webhook: {response.text}"
+
+    no_redirect_client = TestClient(app, follow_redirects=False)
+    response = no_redirect_client.post(
+        url="/modify_webhook",
+        data={
+            "old_hook": original_webhook_url,
+            "new_hook": new_webhook_url,
+            "redirect_to": f"/webhook_entries?webhook_url={urllib.parse.quote(original_webhook_url)}",
+        },
+    )
+
+    assert response.status_code == 303, f"Expected 303 redirect, got {response.status_code}: {response.text}"
+    assert response.headers["location"] == (f"/webhook_entries?webhook_url={urllib.parse.quote(new_webhook_url)}"), (
+        f"Unexpected redirect location: {response.headers['location']}"
+    )
+
+    client.post(url="/delete_webhook", data={"webhook_url": new_webhook_url})
+
+
+def test_webhook_entries_mass_update_preview_shows_old_and_new_urls() -> None:
+    """Preview should list old->new feed URLs for webhook bulk replacement."""
+
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+        title: str | None = None
+        updates_enabled: bool = True
+        last_exception: None = None
+
+    class StubReader:
+        def __init__(self) -> None:
+            self._feeds: list[DummyFeed] = [
+                DummyFeed(url="https://old.example.com/rss/a.xml", title="A"),
+                DummyFeed(url="https://old.example.com/rss/b.xml", title="B"),
+                DummyFeed(url="https://unchanged.example.com/rss/c.xml", title="C"),
+            ]
+
+        def get_tag(self, resource: object, key: str, default: object = None) -> object:
+            if resource == () and key == "webhooks":
+                return [{"name": webhook_name, "url": webhook_url}]
+            if key == "webhook" and isinstance(resource, str):
+                if resource.startswith("https://old.example.com"):
+                    return webhook_url
+                if resource.startswith("https://unchanged.example.com"):
+                    return webhook_url
+            return default
+
+        def get_feeds(self) -> list[DummyFeed]:
+            return self._feeds
+
+        def get_entries(self, **_kwargs: object) -> list[Entry]:
+            return []
+
+    app.dependency_overrides[get_reader_dependency] = StubReader
+    try:
+        with (
+            patch(
+                "discord_rss_bot.main.get_data_from_hook_url",
+                return_value=main_module.WebhookInfo(custom_name=webhook_name, url=webhook_url),
+            ),
+            patch(
+                "discord_rss_bot.main.resolve_final_feed_url",
+                side_effect=lambda url: (url.replace("old.example.com", "new.example.com"), None),
+            ),
+        ):
+            response: Response = client.get(
+                url="/webhook_entries",
+                params={
+                    "webhook_url": webhook_url,
+                    "replace_from": "old.example.com",
+                    "replace_to": "new.example.com",
+                    "resolve_urls": "true",
+                },
+            )
+
+        assert response.status_code == 200, f"Failed to get preview: {response.text}"
+        assert "Mass update feed URLs" in response.text
+        assert "old.example.com/rss/a.xml" in response.text
+        assert "new.example.com/rss/a.xml" in response.text
+        assert "Will update" in response.text
+        assert "Matched: 2" in response.text
+        assert "Will update: 2" in response.text
+    finally:
+        app.dependency_overrides = {}
+
+
+def test_bulk_change_feed_urls_updates_matching_feeds() -> None:
+    """Mass updater should change all matching feed URLs for a webhook."""
+
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+
+    class StubReader:
+        def __init__(self) -> None:
+            self._feeds = [
+                DummyFeed(url="https://old.example.com/rss/a.xml"),
+                DummyFeed(url="https://old.example.com/rss/b.xml"),
+                DummyFeed(url="https://unchanged.example.com/rss/c.xml"),
+            ]
+            self.change_calls: list[tuple[str, str]] = []
+            self.updated_feeds: list[str] = []
+
+        def get_tag(self, resource: object, key: str, default: object = None) -> object:
+            if resource == () and key == "webhooks":
+                return [{"name": webhook_name, "url": webhook_url}]
+            if key == "webhook" and isinstance(resource, str):
+                return webhook_url
+            return default
+
+        def get_feeds(self) -> list[DummyFeed]:
+            return self._feeds
+
+        def change_feed_url(self, old_url: str, new_url: str) -> None:
+            self.change_calls.append((old_url, new_url))
+
+        def update_feed(self, feed_url: str) -> None:
+            self.updated_feeds.append(feed_url)
+
+        def get_entries(self, **_kwargs: object) -> list[Entry]:
+            return []
+
+        def set_entry_read(self, _entry: Entry, _value: bool) -> None:  # noqa: FBT001
+            return
+
+    stub_reader = StubReader()
+    app.dependency_overrides[get_reader_dependency] = lambda: stub_reader
+    no_redirect_client = TestClient(app, follow_redirects=False)
+
+    try:
+        with patch(
+            "discord_rss_bot.main.resolve_final_feed_url",
+            side_effect=lambda url: (url.replace("old.example.com", "new.example.com"), None),
+        ):
+            response: Response = no_redirect_client.post(
+                url="/bulk_change_feed_urls",
+                data={
+                    "webhook_url": webhook_url,
+                    "replace_from": "old.example.com",
+                    "replace_to": "new.example.com",
+                    "resolve_urls": "true",
+                },
+            )
+
+        assert response.status_code == 303, f"Expected redirect, got {response.status_code}: {response.text}"
+        assert "Updated%202%20feed%20URL%28s%29" in response.headers.get("location", "")
+        assert sorted(stub_reader.change_calls) == sorted([
+            ("https://old.example.com/rss/a.xml", "https://new.example.com/rss/a.xml"),
+            ("https://old.example.com/rss/b.xml", "https://new.example.com/rss/b.xml"),
+        ])
+        assert sorted(stub_reader.updated_feeds) == sorted([
+            "https://new.example.com/rss/a.xml",
+            "https://new.example.com/rss/b.xml",
+        ])
+    finally:
+        app.dependency_overrides = {}
+
+
+def test_webhook_entries_mass_update_preview_fragment_endpoint() -> None:
+    """HTMX preview endpoint should render only the mass-update preview fragment."""
+
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+        title: str | None = None
+        updates_enabled: bool = True
+        last_exception: None = None
+
+    class StubReader:
+        def __init__(self) -> None:
+            self._feeds: list[DummyFeed] = [
+                DummyFeed(url="https://old.example.com/rss/a.xml", title="A"),
+                DummyFeed(url="https://old.example.com/rss/b.xml", title="B"),
+            ]
+
+        def get_tag(self, resource: object, key: str, default: object = None) -> object:
+            if key == "webhook" and isinstance(resource, str):
+                return webhook_url
+            return default
+
+        def get_feeds(self) -> list[DummyFeed]:
+            return self._feeds
+
+    app.dependency_overrides[get_reader_dependency] = StubReader
+    try:
+        with patch(
+            "discord_rss_bot.main.resolve_final_feed_url",
+            side_effect=lambda url: (url.replace("old.example.com", "new.example.com"), None),
+        ):
+            response: Response = client.get(
+                url="/webhook_entries_mass_update_preview",
+                params={
+                    "webhook_url": webhook_url,
+                    "replace_from": "old.example.com",
+                    "replace_to": "new.example.com",
+                    "resolve_urls": "true",
+                },
+            )
+
+        assert response.status_code == 200, f"Failed to get HTMX preview fragment: {response.text}"
+        assert "Will update: 2" in response.text
+        assert "<table" in response.text
+        assert "Mass update feed URLs" not in response.text, "Fragment should not include full page wrapper text"
+    finally:
+        app.dependency_overrides = {}
+
+
+def test_bulk_change_feed_urls_force_update_overwrites_conflict() -> None:  # noqa: C901
+    """Force update should overwrite conflicting target URLs instead of skipping them."""
+
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+
+    class StubReader:
+        def __init__(self) -> None:
+            self._feeds = [
+                DummyFeed(url="https://old.example.com/rss/a.xml"),
+                DummyFeed(url="https://new.example.com/rss/a.xml"),
+            ]
+            self.delete_calls: list[str] = []
+            self.change_calls: list[tuple[str, str]] = []
+
+        def get_tag(self, resource: object, key: str, default: object = None) -> object:
+            if resource == () and key == "webhooks":
+                return [{"name": webhook_name, "url": webhook_url}]
+            if key == "webhook" and isinstance(resource, str):
+                return webhook_url
+            return default
+
+        def get_feeds(self) -> list[DummyFeed]:
+            return self._feeds
+
+        def delete_feed(self, feed_url: str) -> None:
+            self.delete_calls.append(feed_url)
+
+        def change_feed_url(self, old_url: str, new_url: str) -> None:
+            self.change_calls.append((old_url, new_url))
+
+        def update_feed(self, _feed_url: str) -> None:
+            return
+
+        def get_entries(self, **_kwargs: object) -> list[Entry]:
+            return []
+
+        def set_entry_read(self, _entry: Entry, _value: bool) -> None:  # noqa: FBT001
+            return
+
+    stub_reader = StubReader()
+    app.dependency_overrides[get_reader_dependency] = lambda: stub_reader
+    no_redirect_client = TestClient(app, follow_redirects=False)
+
+    try:
+        with patch(
+            "discord_rss_bot.main.resolve_final_feed_url",
+            side_effect=lambda url: (url.replace("old.example.com", "new.example.com"), None),
+        ):
+            response: Response = no_redirect_client.post(
+                url="/bulk_change_feed_urls",
+                data={
+                    "webhook_url": webhook_url,
+                    "replace_from": "old.example.com",
+                    "replace_to": "new.example.com",
+                    "resolve_urls": "true",
+                    "force_update": "true",
+                },
+            )
+
+        assert response.status_code == 303, f"Expected redirect, got {response.status_code}: {response.text}"
+        assert stub_reader.delete_calls == ["https://new.example.com/rss/a.xml"]
+        assert stub_reader.change_calls == [
+            (
+                "https://old.example.com/rss/a.xml",
+                "https://new.example.com/rss/a.xml",
+            ),
+        ]
+        assert "Force%20overwrote%201" in response.headers.get("location", "")
+    finally:
+        app.dependency_overrides = {}
+
+
+def test_bulk_change_feed_urls_force_update_ignores_resolution_error() -> None:
+    """Force update should proceed even when URL resolution returns an error (e.g. HTTP 404)."""
+
+    @dataclass(slots=True)
+    class DummyFeed:
+        url: str
+
+    class StubReader:
+        def __init__(self) -> None:
+            self._feeds = [
+                DummyFeed(url="https://old.example.com/rss/a.xml"),
+            ]
+            self.change_calls: list[tuple[str, str]] = []
+
+        def get_tag(self, resource: object, key: str, default: object = None) -> object:
+            if resource == () and key == "webhooks":
+                return [{"name": webhook_name, "url": webhook_url}]
+            if key == "webhook" and isinstance(resource, str):
+                return webhook_url
+            return default
+
+        def get_feeds(self) -> list[DummyFeed]:
+            return self._feeds
+
+        def change_feed_url(self, old_url: str, new_url: str) -> None:
+            self.change_calls.append((old_url, new_url))
+
+        def update_feed(self, _feed_url: str) -> None:
+            return
+
+        def get_entries(self, **_kwargs: object) -> list[Entry]:
+            return []
+
+        def set_entry_read(self, _entry: Entry, _value: bool) -> None:  # noqa: FBT001
+            return
+
+    stub_reader = StubReader()
+    app.dependency_overrides[get_reader_dependency] = lambda: stub_reader
+    no_redirect_client = TestClient(app, follow_redirects=False)
+
+    try:
+        with patch(
+            "discord_rss_bot.main.resolve_final_feed_url",
+            return_value=("https://new.example.com/rss/a.xml", "HTTP 404"),
+        ):
+            response: Response = no_redirect_client.post(
+                url="/bulk_change_feed_urls",
+                data={
+                    "webhook_url": webhook_url,
+                    "replace_from": "old.example.com",
+                    "replace_to": "new.example.com",
+                    "resolve_urls": "true",
+                    "force_update": "true",
+                },
+            )
+
+        assert response.status_code == 303, f"Expected redirect, got {response.status_code}: {response.text}"
+        assert stub_reader.change_calls == [
+            (
+                "https://old.example.com/rss/a.xml",
+                "https://new.example.com/rss/a.xml",
+            ),
+        ]
+        location = response.headers.get("location", "")
+        assert "Updated%201%20feed%20URL%28s%29" in location
+        assert "Failed%200" in location
+    finally:
+        app.dependency_overrides = {}
+
+
+def test_reader_dependency_override_is_used() -> None:
+    """Reader should be injectable and overridable via FastAPI dependency overrides."""
+
+    class StubReader:
+        def get_tag(self, _resource: str, _key: str, default: str | None = None) -> str | None:
+            """Stub get_tag that always returns the default value.
+
+            Args:
+                _resource: Ignored.
+                _key: Ignored.
+                default: The value to return.
+
+            Returns:
+                The default value, simulating a missing tag.
+            """
+            return default
+
+    app.dependency_overrides[get_reader_dependency] = StubReader
+    try:
+        response: Response = client.get(url="/add")
+        assert response.status_code == 200, f"Expected /add to render with overridden reader: {response.text}"
+    finally:
+        app.dependency_overrides = {}
diff --git a/tests/test_search.py b/tests/test_search.py
index ada1464..77681cf 100644
--- a/tests/test_search.py
+++ b/tests/test_search.py
@@ -46,7 +46,7 @@ def test_create_search_context() -> None:
         reader.update_search()
 
         # Create the search context.
-        context: dict = create_search_context("test", custom_reader=reader)
+        context: dict = create_search_context("test", reader=reader)
         assert context is not None, f"The context should not be None. Got: {context}"
 
         # Close the reader, so we can delete the directory.
diff --git a/tests/test_settings.py b/tests/test_settings.py
index 5a54094..bcab720 100644
--- a/tests/test_settings.py
+++ b/tests/test_settings.py
@@ -22,12 +22,12 @@ def test_reader() -> None:
         Path.mkdir(Path(temp_dir), exist_ok=True)
 
         custom_loc: pathlib.Path = pathlib.Path(temp_dir, "custom_loc_db.sqlite")
-        custom_reader: Reader = get_reader(custom_location=str(custom_loc))
-        assert_msg = f"The custom reader should be an instance of Reader. But it was '{type(custom_reader)}'."
-        assert isinstance(custom_reader, Reader), assert_msg
+        reader: Reader = get_reader(custom_location=str(custom_loc))
+        assert_msg = f"The custom reader should be an instance of Reader. But it was '{type(reader)}'."
+        assert isinstance(reader, Reader), assert_msg
 
         # Close the reader, so we can delete the directory.
-        custom_reader.close()
+        reader.close()
 
 
 def test_data_dir() -> None:
@@ -49,16 +49,16 @@ def test_get_webhook_for_entry() -> None:
         Path.mkdir(Path(temp_dir), exist_ok=True)
 
         custom_loc: pathlib.Path = pathlib.Path(temp_dir, "custom_loc_db.sqlite")
-        custom_reader: Reader = get_reader(custom_location=str(custom_loc))
+        reader: Reader = get_reader(custom_location=str(custom_loc))
 
         # Add a feed to the database.
-        custom_reader.add_feed("https://www.reddit.com/r/movies.rss")
-        custom_reader.update_feed("https://www.reddit.com/r/movies.rss")
+        reader.add_feed("https://www.reddit.com/r/movies.rss")
+        reader.update_feed("https://www.reddit.com/r/movies.rss")
 
         # Add a webhook to the database.
-        custom_reader.set_tag("https://www.reddit.com/r/movies.rss", "webhook", "https://example.com")  # pyright: ignore[reportArgumentType]
-        our_tag = custom_reader.get_tag("https://www.reddit.com/r/movies.rss", "webhook")  # pyright: ignore[reportArgumentType]
+        reader.set_tag("https://www.reddit.com/r/movies.rss", "webhook", "https://example.com")  # pyright: ignore[reportArgumentType]
+        our_tag = reader.get_tag("https://www.reddit.com/r/movies.rss", "webhook")  # pyright: ignore[reportArgumentType]
         assert our_tag == "https://example.com", f"The tag should be 'https://example.com'. But it was '{our_tag}'."
 
         # Close the reader, so we can delete the directory.
-        custom_reader.close()
+        reader.close()
diff --git a/tests/test_whitelist.py b/tests/test_whitelist.py
index 462d652..6e911fe 100644
--- a/tests/test_whitelist.py
+++ b/tests/test_whitelist.py
@@ -37,7 +37,7 @@ def test_has_white_tags() -> None:
     reader.update_feeds()
 
     # Test feed without any whitelist tags
-    assert has_white_tags(custom_reader=get_reader(), feed=feed) is False, "Feed should not have any whitelist tags"
+    assert has_white_tags(reader=get_reader(), feed=feed) is False, "Feed should not have any whitelist tags"
 
     check_if_has_tag(reader, feed, "whitelist_title")
     check_if_has_tag(reader, feed, "whitelist_summary")
@@ -56,9 +56,9 @@ def test_has_white_tags() -> None:
 
 def check_if_has_tag(reader: Reader, feed: Feed, whitelist_name: str) -> None:
     reader.set_tag(feed, whitelist_name, "a")  # pyright: ignore[reportArgumentType]
-    assert has_white_tags(custom_reader=reader, feed=feed) is True, "Feed should have whitelist tags"
+    assert has_white_tags(reader=reader, feed=feed) is True, "Feed should have whitelist tags"
     reader.delete_tag(feed, whitelist_name)
-    assert has_white_tags(custom_reader=reader, feed=feed) is False, "Feed should not have any whitelist tags"
+    assert has_white_tags(reader=reader, feed=feed) is False, "Feed should not have any whitelist tags"
 
 
 def test_should_be_sent() -> None: