Fix 7 bugs: bounds checks, deepcopy, time import, JS keys, unused import

- Add bounds check on src_batch index in add_from_source and copy_source
- Guard delete callback against stale index after rapid clicks
- Replace __import__('time').time() with time.time() in sync_to_db
- Use deepcopy(DEFAULTS) consistently in utils.py and main.py
- Use JSON.stringify in JS onConfigure fallback path for key storage
- Read state.show_comfy_monitor for checkbox initial value
- Remove unused KEY_BATCH_DATA import from tab_projects_ng

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

utils.py

@@ -1,3 +1,4 @@
+import copy
 import json
 import logging
 import os
@@ -182,7 +183,7 @@ def sync_to_db(db, project_name: str, file_path: Path, data: dict) -> None:
             top_level = {k: v for k, v in data.items()
                          if k not in (KEY_BATCH_DATA, KEY_HISTORY_TREE)}
             if not df:
-                now = __import__('time').time()
+                now = time.time()
                 cur = db.conn.execute(
                     "INSERT INTO data_files (project_id, name, data_type, top_level, created_at, updated_at) "
                     "VALUES (?, ?, ?, ?, ?, ?)",
@@ -192,7 +193,7 @@ def sync_to_db(db, project_name: str, file_path: Path, data: dict) -> None:
             else:
                 df_id = df["id"]
                 # Update top_level metadata
-                now = __import__('time').time()
+                now = time.time()
                 db.conn.execute(
                     "UPDATE data_files SET top_level = ?, updated_at = ? WHERE id = ?",
                     (json.dumps(top_level), now, df_id),
@@ -206,7 +207,7 @@ def sync_to_db(db, project_name: str, file_path: Path, data: dict) -> None:
                     if not isinstance(item, dict):
                         continue
                     seq_num = int(item.get(KEY_SEQUENCE_NUMBER, 0))
-                    now = __import__('time').time()
+                    now = time.time()
                     db.conn.execute(
                         "INSERT INTO sequences (data_file_id, sequence_number, data, updated_at) "
                         "VALUES (?, ?, ?, ?)",
@@ -216,7 +217,7 @@ def sync_to_db(db, project_name: str, file_path: Path, data: dict) -> None:
             # Sync history tree
             history_tree = data.get(KEY_HISTORY_TREE)
             if history_tree and isinstance(history_tree, dict):
-                now = __import__('time').time()
+                now = time.time()
                 db.conn.execute(
                     "INSERT INTO history_trees (data_file_id, tree_data, updated_at) "
                     "VALUES (?, ?, ?) "
@@ -237,10 +238,10 @@ def sync_to_db(db, project_name: str, file_path: Path, data: dict) -> None:
 
 def generate_templates(current_dir: Path) -> None:
     """Creates batch template files if folder is empty."""
-    first = DEFAULTS.copy()
+    first = copy.deepcopy(DEFAULTS)
     first[KEY_SEQUENCE_NUMBER] = 1
     save_json(current_dir / "batch_prompt_i2v.json", {KEY_BATCH_DATA: [first]})
 
-    first2 = DEFAULTS.copy()
+    first2 = copy.deepcopy(DEFAULTS)
     first2[KEY_SEQUENCE_NUMBER] = 1
     save_json(current_dir / "batch_prompt_vace_extend.json", {KEY_BATCH_DATA: [first2]})