Fix settings loading and use 2-column card layout.

Merge Flask GET/POST routes, refresh prefs on tab revisit after preload, and reorganize system settings into separate cards.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/instance/instance_settings_register.py

@@ -65,21 +65,18 @@ def register_instance_settings_routes(
     example_path = os.path.join(base_dir, ".env.example")
     api_auth = _api_login_required()
 
-    @app.route("/api/settings/display", methods=["GET"])
+    @app.route("/api/settings/display", methods=["GET", "POST"])
     @api_auth
-    def api_get_display_prefs():
-        prefs = get_display_prefs(get_db)
-        return jsonify(
-            {
-                "ok": True,
-                "display": prefs,
-                "meta": display_meta_for_ui(),
-            }
-        )
-
-    @app.route("/api/settings/display", methods=["POST"])
-    @api_auth
-    def api_save_display_prefs():
+    def api_settings_display():
+        if request.method == "GET":
+            prefs = get_display_prefs(get_db)
+            return jsonify(
+                {
+                    "ok": True,
+                    "display": prefs,
+                    "meta": display_meta_for_ui(),
+                }
+            )
         body = request.get_json(silent=True) or {}
         raw = body.get("display") if isinstance(body.get("display"), dict) else body
         saved = save_display_prefs(get_db, raw)
@@ -91,15 +88,12 @@ def register_instance_settings_routes(
         payload = build_env_payload(example_path, env_path)
         return jsonify({"ok": True, **payload})
 
-    @app.route("/api/settings/env", methods=["GET"])
+    @app.route("/api/settings/env", methods=["GET", "POST"])
     @api_auth
-    def api_env_get():
-        payload = build_env_payload(example_path, env_path)
-        return jsonify({"ok": True, **payload})
-
-    @app.route("/api/settings/env", methods=["POST"])
-    @api_auth
-    def api_env_post():
+    def api_settings_env():
+        if request.method == "GET":
+            payload = build_env_payload(example_path, env_path)
+            return jsonify({"ok": True, **payload})
         body = request.get_json(silent=True) or {}
         updates = body.get("values") if isinstance(body.get("values"), dict) else body
         if not isinstance(updates, dict):