Fix select options not pushing to browser and remaining shallow copies

- Use set_options() instead of direct .options assignment (3 locations)
  so dropdown changes actually reach the browser
- Wrap res.json() in try/except for non-JSON server responses
- Deep copy in create_batch and promote to match rest of codebase

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

tab_batch_ng.py

@@ -119,7 +119,7 @@ def render_batch_processor(state: AppState):
             if new_path.exists():
                 ui.notify(f'File {new_name} already exists!', type='warning')
                 return
-            first_item = data.copy()
+            first_item = copy.deepcopy(data)
             first_item.pop(KEY_PROMPT_HISTORY, None)
             first_item.pop(KEY_HISTORY_TREE, None)
             first_item[KEY_SEQUENCE_NUMBER] = 1
@@ -164,10 +164,9 @@ def render_batch_processor(state: AppState):
             if _src_cache['batch']:
                 opts = {i: format_seq_label(s.get(KEY_SEQUENCE_NUMBER, i+1))
                         for i, s in enumerate(_src_cache['batch'])}
-                src_seq_select.options = opts
+                src_seq_select.set_options(opts, value=0)
-                src_seq_select.set_value(0)
             else:
-                src_seq_select.options = {}
+                src_seq_select.set_options({})
 
     src_file_select.on_value_change(lambda _: _update_src())
     _update_src()
@@ -366,9 +365,9 @@ def _render_sequence_card(i, seq, batch_list, data, file_path, state,
 
             # Promote
             def promote(idx=i, s=seq):
-                single_data = s.copy()
+                single_data = copy.deepcopy(s)
-                single_data[KEY_PROMPT_HISTORY] = data.get(KEY_PROMPT_HISTORY, [])
+                single_data[KEY_PROMPT_HISTORY] = copy.deepcopy(data.get(KEY_PROMPT_HISTORY, []))
-                single_data[KEY_HISTORY_TREE] = data.get(KEY_HISTORY_TREE, {})
+                single_data[KEY_HISTORY_TREE] = copy.deepcopy(data.get(KEY_HISTORY_TREE, {}))
                 single_data.pop(KEY_SEQUENCE_NUMBER, None)
                 save_json(file_path, single_data)
                 state.data_cache = single_data
@@ -646,7 +645,7 @@ def _render_mass_update(batch_list, data, file_path, state: AppState):
             if idx is not None and 0 <= idx < len(batch_list):
                 src = batch_list[idx]
                 keys = [k for k in src.keys() if k != 'sequence_number']
-                field_select.options = keys
+                field_select.set_options(keys)
 
         source_select.on_value_change(update_fields)
         update_fields()

tab_comfy_ng.py

@@ -144,7 +144,11 @@ def _render_single_instance(state: AppState, instance_config: dict, index: int,
             None, lambda: _fetch_blocking(f'{comfy_url}/queue'))
         with status_container:
             if res is not None:
-                queue_data = res.json()
+                try:
+                    queue_data = res.json()
+                except (ValueError, Exception):
+                    ui.label('Invalid response from server').classes('text-negative')
+                    return
                 running_cnt = len(queue_data.get('queue_running', []))
                 pending_cnt = len(queue_data.get('queue_pending', []))
 
@@ -238,7 +242,11 @@ def _render_single_instance(state: AppState, instance_config: dict, index: int,
             if err is not None:
                 ui.label(f'Error fetching image: {err}').classes('text-negative')
                 return
-            history = res.json()
+            try:
+                history = res.json()
+            except (ValueError, Exception):
+                ui.label('Invalid response from server').classes('text-negative')
+                return
             if not history:
                 ui.label('No history found.').classes('text-caption')
                 return