feat(trip-cluster): config, factory, CLI skeleton, health + thumb proxy

apps/trip-cluster/app/__init__.py

@@ -0,0 +1,21 @@
+from flask import Flask
+
+from app.config import load_config
+from photoflow.ui import register_shared_ui
+
+
+def create_app(config=None) -> Flask:
+    app = Flask(__name__)
+    cfg = config or load_config()
+    app.config["APP_CONFIG"] = cfg
+    app.config["DATA_DIR"] = cfg.data_dir
+
+    register_shared_ui(app)
+
+    from app.routes.nav import bp as nav_bp
+    from app.routes.review import bp as review_bp
+    from app.routes.proxy import bp as proxy_bp
+    app.register_blueprint(nav_bp)
+    app.register_blueprint(review_bp)
+    app.register_blueprint(proxy_bp)
+    return app