Add extra prompts, endless generation, random character default, and small fixes

- Add extra positive/negative prompt textareas to all 9 detail pages with session persistence
- Add Endless generation button to all detail pages (continuous preview generation until stopped)
- Default character selector to "Random Character" on all secondary detail pages
- Fix queue clear endpoint (remove spurious auth check)
- Refactor app.py into routes/ and services/ modules
- Update CLAUDE.md with new architecture documentation
- Various data file updates and cleanup

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

routes/__init__.py

@@ -0,0 +1,33 @@
+def register_routes(app):
+    """Register all route modules with the Flask app."""
+    from routes import queue_api
+    from routes import settings
+    from routes import characters
+    from routes import outfits
+    from routes import actions
+    from routes import styles
+    from routes import scenes
+    from routes import detailers
+    from routes import checkpoints
+    from routes import looks
+    from routes import presets
+    from routes import generator
+    from routes import gallery
+    from routes import strengths
+    from routes import transfer
+
+    queue_api.register_routes(app)
+    settings.register_routes(app)
+    characters.register_routes(app)
+    outfits.register_routes(app)
+    actions.register_routes(app)
+    styles.register_routes(app)
+    scenes.register_routes(app)
+    detailers.register_routes(app)
+    checkpoints.register_routes(app)
+    looks.register_routes(app)
+    presets.register_routes(app)
+    generator.register_routes(app)
+    gallery.register_routes(app)
+    strengths.register_routes(app)
+    transfer.register_routes(app)