feat: parse hashtags from content instead of dedicated tag input

Tags are now automatically extracted from #hashtags in content text.
Removed TagInput from entry editing, keeping it only in FilterBar.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/routes/+page.svelte

@@ -72,7 +72,7 @@
 	</div>
 
 	<div class="max-w-2xl mx-auto px-4 py-4">
-		<EntryList entries={data.entries} availableTags={data.allTags} {filters} {searchQuery} />
+		<EntryList entries={data.entries} {filters} {searchQuery} />
 	</div>
 
 	<QuickCapture />