Fix 7 bugs: async proxies, mode default, JS key serialization, validation

- Use asyncio.to_thread for proxy endpoints to avoid blocking event loop
- Add mode to DEFAULTS so it doesn't silently insert 0
- Use JSON serialization for keys in project_dynamic.js (with comma fallback)
- Validate path exists in change_path, friendly error on duplicate rename
- Remove unused exp param from rename closure
- Use deepcopy for DEFAULTS consistently

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

project_loader.py

@@ -1,3 +1,4 @@
+import asyncio
 import json
 import logging
 import urllib.parse
@@ -88,7 +89,7 @@ if PromptServer is not None:
     async def list_projects_proxy(request):
         manager_url = request.query.get("url", "http://localhost:8080")
         url = f"{manager_url.rstrip('/')}/api/projects"
-        data = _fetch_json(url)
+        data = await asyncio.to_thread(_fetch_json, url)
         return web.json_response(data)
 
     @PromptServer.instance.routes.get("/json_manager/list_project_files")
@@ -96,7 +97,7 @@ if PromptServer is not None:
         manager_url = request.query.get("url", "http://localhost:8080")
         project = urllib.parse.quote(request.query.get("project", ""), safe='')
         url = f"{manager_url.rstrip('/')}/api/projects/{project}/files"
-        data = _fetch_json(url)
+        data = await asyncio.to_thread(_fetch_json, url)
         return web.json_response(data)
 
     @PromptServer.instance.routes.get("/json_manager/list_project_sequences")
@@ -105,7 +106,7 @@ if PromptServer is not None:
         project = urllib.parse.quote(request.query.get("project", ""), safe='')
         file_name = urllib.parse.quote(request.query.get("file", ""), safe='')
         url = f"{manager_url.rstrip('/')}/api/projects/{project}/files/{file_name}/sequences"
-        data = _fetch_json(url)
+        data = await asyncio.to_thread(_fetch_json, url)
         return web.json_response(data)
 
     @PromptServer.instance.routes.get("/json_manager/get_project_keys")
@@ -117,7 +118,7 @@ if PromptServer is not None:
             seq = int(request.query.get("seq", "1"))
         except (ValueError, TypeError):
             seq = 1
-        data = _fetch_keys(manager_url, project, file_name, seq)
+        data = await asyncio.to_thread(_fetch_keys, manager_url, project, file_name, seq)
         if data.get("error") in ("http_error", "network_error", "parse_error"):
             status = data.get("status", 502)
             return web.json_response(data, status=status)

tab_batch_ng.py

@@ -267,7 +267,7 @@ def render_batch_processor(state: AppState):
 
             with ui.row().classes('q-mt-sm'):
                 def add_empty():
-                    _add_sequence(DEFAULTS.copy())
+                    _add_sequence(copy.deepcopy(DEFAULTS))
 
                 def add_from_source():
                     item = copy.deepcopy(DEFAULTS)
@@ -383,7 +383,7 @@ def _render_sequence_card(i, seq, batch_list, data, file_path, state,
         # --- Action row ---
         with ui.row().classes('w-full q-gutter-sm action-row'):
             # Rename
-            async def rename(idx=i, s=seq, exp=expansion):
+            async def rename(s=seq):
                 result = await ui.run_javascript(
                     f'prompt("Rename sequence:", {json.dumps(s.get("name", ""))})',
                     timeout=30.0,

tab_projects_ng.py

@@ -1,5 +1,6 @@
 import json
 import logging
+import sqlite3
 from pathlib import Path
 
 from nicegui import ui
@@ -127,6 +128,9 @@ def render_projects_tab(state: AppState):
                                                         state.config)
                                         ui.notify(f'Renamed to "{new_name}"', type='positive')
                                         render_project_list.refresh()
+                                    except sqlite3.IntegrityError:
+                                        ui.notify(f'A project named "{new_name}" already exists',
+                                                  type='warning')
                                     except Exception as e:
                                         ui.notify(f'Error: {e}', type='negative')
 
@@ -140,6 +144,9 @@ def render_projects_tab(state: AppState):
                                 )
                                 if new_path and new_path.strip() and new_path.strip() != path:
                                     new_path = new_path.strip()
+                                    if not Path(new_path).is_dir():
+                                        ui.notify(f'Warning: "{new_path}" does not exist',
+                                                  type='warning')
                                     state.db.update_project_path(name, new_path)
                                     ui.notify(f'Path updated to "{new_path}"', type='positive')
                                     render_project_list.refresh()

utils.py

@@ -30,6 +30,7 @@ DEFAULTS = {
     "cfg": 1.5,
 
     # --- Settings ---
+    "mode": 0,
     "camera": "static",
     "flf": 0.0,
 

web/project_dynamic.js

@@ -117,11 +117,11 @@ app.registerExtension({
                     return;
                 }
 
-                // Store keys and types in hidden widgets for persistence (comma-separated)
+                // Store keys and types in hidden widgets for persistence (JSON)
                 const okWidget = this.widgets?.find(w => w.name === "output_keys");
-                if (okWidget) okWidget.value = keys.join(",");
+                if (okWidget) okWidget.value = JSON.stringify(keys);
                 const otWidget = this.widgets?.find(w => w.name === "output_types");
-                if (otWidget) otWidget.value = types.join(",");
+                if (otWidget) otWidget.value = JSON.stringify(types);
 
                 // Slot 0 is always total_sequences (INT) — ensure it exists
                 if (this.outputs.length === 0 || this.outputs[0].name !== "total_sequences") {
@@ -198,12 +198,18 @@ app.registerExtension({
             const okWidget = this.widgets?.find(w => w.name === "output_keys");
             const otWidget = this.widgets?.find(w => w.name === "output_types");
 
-            const keys = okWidget?.value
+            let keys = [];
-                ? okWidget.value.split(",").filter(k => k.trim())
+            let types = [];
-                : [];
+            if (okWidget?.value) {
-            const types = otWidget?.value
+                try { keys = JSON.parse(okWidget.value); } catch (_) {
-                ? otWidget.value.split(",")
+                    keys = okWidget.value.split(",").filter(k => k.trim());
-                : [];
+                }
+            }
+            if (otWidget?.value) {
+                try { types = JSON.parse(otWidget.value); } catch (_) {
+                    types = otWidget.value.split(",");
+                }
+            }
 
             // Ensure slot 0 is total_sequences (INT)
             if (this.outputs.length === 0 || this.outputs[0].name !== "total_sequences") {