UI polish: live job polling, panel layout, pending button states

- Poll /api/ai-tagging/fields every 2s after any 202 (queued) response in
  ImageLightbox and DoomScrollView so extraction, translation, and description
  results appear automatically without a page refresh
- DoomScrollView extract button now turns accent-coloured while a job is
  queued instead of flashing red; red is reserved for genuine errors
- Kebab menu "Translate" option is now gated on entry.hasExtractedText
  (populated via a batch DB query in the browse API) so it only appears
  when there is text to translate
- Tag panel redesigned: toolbar collapses to just the filename when open;
  panel header holds hide (›), AI Tagger (✨), and Close (✕) buttons;
  sections ordered Description → Text Extraction → Tags; description
  state and generate handler moved from TagSelector into ImageLightbox
- VideoPlayerModal receives the same toolbar/panel restructure
- TagSelector gains hideDescription prop so the parent can own description

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/api/browse/route.ts

@@ -1,4 +1,5 @@
 import fs from 'fs'
+import path from 'path'
 import { NextRequest, NextResponse } from 'next/server'
 import { getLibrary, resolveLibraryRoot, resolveAndJail } from '@/lib/libraries'
 import { scanDirectory, scanDirectoryRecursive } from '@/lib/files'
@@ -31,6 +32,21 @@ export async function GET(request: NextRequest) {
   const listing = recursive
     ? scanDirectoryRecursive(root, libraryId, subpath)
     : scanDirectory(root, libraryId, subpath)
+
+  // Annotate image entries with whether they have extracted text
+  const db = getDb()
+  const rows = db
+    .prepare('SELECT item_key FROM media_items WHERE library_id = ? AND extracted_text IS NOT NULL')
+    .all(libraryId) as { item_key: string }[]
+  const withText = new Set(rows.map((r) => r.item_key))
+
+  listing.entries = listing.entries.map((e) => {
+    if (e.type !== 'file' || e.mediaType !== 'image') return e
+    const relPath = subpath ? path.join(subpath, e.name) : e.name
+    const itemKey = `${libraryId}:mixed_file:${encodeURIComponent(relPath)}`
+    return { ...e, hasExtractedText: withText.has(itemKey) }
+  })
+
   return NextResponse.json(listing)
 }