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.server.ts

@@ -8,6 +8,7 @@ import {
 	deleteImage as deleteImageFile
 } from '$lib/server/images/storage';
 import { generateThumbnail } from '$lib/server/images/thumbnails';
+import { parseHashtags } from '$lib/utils/parseHashtags';
 
 export const load: PageServerLoad = async ({ url }) => {
 	const showCompleted = url.searchParams.get('showCompleted') === 'true';
@@ -53,6 +54,12 @@ export const actions: Actions = {
 			type: type || 'thought'
 		});
 
+		// Parse hashtags from content and save them
+		const hashtags = parseHashtags(content);
+		if (hashtags.length > 0) {
+			tagRepository.updateEntryTags(entry.id, hashtags);
+		}
+
 		return { success: true, entryId: entry.id };
 	},
 
@@ -77,6 +84,7 @@ export const actions: Actions = {
 			updates.title = title.toString().trim() || null;
 		}
 
+		let contentChanged = false;
 		const content = formData.get('content');
 		if (content !== null) {
 			const contentStr = content.toString().trim();
@@ -84,6 +92,7 @@ export const actions: Actions = {
 				return fail(400, { error: 'Content cannot be empty' });
 			}
 			updates.content = contentStr;
+			contentChanged = true;
 		}
 
 		const type = formData.get('type');
@@ -106,6 +115,12 @@ export const actions: Actions = {
 
 		entryRepository.update(id, updates);
 
+		// Re-parse hashtags if content changed
+		if (contentChanged && updates.content) {
+			const hashtags = parseHashtags(updates.content as string);
+			tagRepository.updateEntryTags(id, hashtags);
+		}
+
 		return { success: true };
 	},