feat: major platform expansion — Brain service, RSS reader, iOS app, AI assistants, Firefox extension

Brain Service:
- Playwright stealth crawler replacing browserless (og:image, Readability, Reddit JSON API)
- AI classification with tag definitions and folder assignment
- YouTube video download via yt-dlp
- Karakeep migration complete (96 items)
- Taxonomy management (folders with icons/colors, tags)
- Discovery shuffle, sort options, search (Meilisearch + pgvector)
- Item tag/folder editing, card color accents

RSS Reader Service:
- Custom FastAPI reader replacing Miniflux
- Feed management (add/delete/refresh), category support
- Full article extraction via Readability
- Background content fetching for new entries
- Mark all read with confirmation
- Infinite scroll, retention cleanup (30/60 day)
- 17 feeds migrated from Miniflux

iOS App (SwiftUI):
- Native iOS 17+ app with @Observable architecture
- Cookie-based auth, configurable gateway URL
- Dashboard with custom background photo + frosted glass widgets
- Full fitness module (today/templates/goals/food library)
- AI assistant chat (fitness + brain, raw JSON state management)
- 120fps ProMotion support

AI Assistants (Gateway):
- Unified dispatcher with fitness/brain domain detection
- Fitness: natural language food logging, photo analysis, multi-item splitting
- Brain: save/append/update/delete notes, search & answer, undo support
- Madiha user gets fitness-only (brain disabled)

Firefox Extension:
- One-click save to Brain from any page
- Login with platform credentials
- Right-click context menu (save page/link/image)
- Notes field for URL saves
- Signed and published on AMO

Other:
- Reader bookmark button routes to Brain (was Karakeep)
- Fitness food library with "Add" button + add-to-meal popup
- Kindle send file size check (25MB SMTP2GO limit)
- Atelier UI as default (useAtelierShell=true)
- Mobile upload box in nav drawer

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

gateway/database.py

@@ -8,7 +8,7 @@ import bcrypt
 
 from config import (
     DB_PATH, TRIPS_URL, FITNESS_URL, INVENTORY_URL,
-    MINIFLUX_URL, SHELFMARK_URL, SPOTIZERR_URL, BUDGET_URL, TASKS_URL, BRAIN_URL,
+    MINIFLUX_URL, READER_URL, SHELFMARK_URL, SPOTIZERR_URL, BUDGET_URL, TASKS_URL, BRAIN_URL,
 )
 
 
@@ -94,9 +94,13 @@ def init_db():
     # Ensure reader app exists
     rdr = c.execute("SELECT id FROM apps WHERE id = 'reader'").fetchone()
     if not rdr:
-        c.execute("INSERT INTO apps VALUES ('reader', 'Reader', 'rss', '/reader', ?, 4, 1, 'unread_count')", (MINIFLUX_URL,))
+        c.execute("INSERT INTO apps VALUES ('reader', 'Reader', 'rss', '/reader', ?, 4, 1, 'unread_count')", (READER_URL,))
         conn.commit()
         print("[Gateway] Added reader app")
+    else:
+        # Update existing reader app to point to new service
+        c.execute("UPDATE apps SET proxy_target = ? WHERE id = 'reader'", (READER_URL,))
+        conn.commit()
 
     # Ensure books app exists (now media)
     books = c.execute("SELECT id FROM apps WHERE id = 'books'").fetchone()