Fix 25+ bugs across rounds 4-8 of comprehensive code review

history_tree.py:
- Cycle protection in generate_graph() parent walk
- KeyError → .get() for malformed node data in commit() and generate_graph()
- UUID collision check with for/else raise in commit() and _migrate_legacy()
- RuntimeError → ValueError for consistent exception handling

tab_timeline_ng.py:
- Re-parent children walks to surviving ancestor for batch deletes
- Branch tip deletion re-points to parent instead of removing branch
- Cycle protection in _walk_branch_nodes and _find_branch_for_node
- Full data.clear() restore instead of merge in _restore_node
- Safe .get('data', {}) in restore and preview
- Reset stale branch selection after node deletion
- json.dumps for safe JS string escaping in graphviz renderer

tab_batch_ng.py:
- NaN/inf rejection in dict_number with math.isfinite()
- _safe_int used in recalc_vace, update_mode_label, frame_to_skip
- Uncaught ValueError from htree.commit() caught with user notification

tab_comfy_ng.py:
- asyncio.get_event_loop() → get_running_loop()

utils.py:
- Atomic writes for save_config and save_snippets
- save_config extra_data can't override explicit last_dir/favorites

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

db.py

@@ -98,6 +98,24 @@ class ProjectDB:
         ).fetchone()
         return dict(row) if row else None
 
+    def rename_project(self, old_name: str, new_name: str) -> bool:
+        now = time.time()
+        cur = self.conn.execute(
+            "UPDATE projects SET name = ?, updated_at = ? WHERE name = ?",
+            (new_name, now, old_name),
+        )
+        self.conn.commit()
+        return cur.rowcount > 0
+
+    def update_project_path(self, name: str, folder_path: str) -> bool:
+        now = time.time()
+        cur = self.conn.execute(
+            "UPDATE projects SET folder_path = ?, updated_at = ? WHERE name = ?",
+            (folder_path, now, name),
+        )
+        self.conn.commit()
+        return cur.rowcount > 0
+
     def delete_project(self, name: str) -> bool:
         cur = self.conn.execute("DELETE FROM projects WHERE name = ?", (name,))
         self.conn.commit()

history_tree.py

@@ -1,3 +1,4 @@
+import html
 import time
 import uuid
 from typing import Any
@@ -17,7 +18,10 @@ class HistoryTree:
     def _migrate_legacy(self, old_list: list[dict[str, Any]]) -> None:
         parent = None
         for item in reversed(old_list):
+            for _ in range(10):
                 node_id = str(uuid.uuid4())[:8]
+                if node_id not in self.nodes:
+                    break
             self.nodes[node_id] = {
                 "id": node_id, "parent": parent, "timestamp": time.time(),
                 "data": item, "note": item.get("note", "Legacy Import")
@@ -27,7 +31,13 @@ class HistoryTree:
         self.head_id = parent
 
     def commit(self, data: dict[str, Any], note: str = "Snapshot") -> str:
+        # Generate unique node ID with collision check
+        for _ in range(10):
             new_id = str(uuid.uuid4())[:8]
+            if new_id not in self.nodes:
+                break
+        else:
+            raise ValueError("Failed to generate unique node ID after 10 attempts")
 
         # Cycle detection: walk parent chain from head to verify no cycle
         if self.head_id:
@@ -38,7 +48,7 @@ class HistoryTree:
                     raise ValueError(f"Cycle detected in history tree at node {current}")
                 visited.add(current)
                 node = self.nodes.get(current)
-                current = node["parent"] if node else None
+                current = node.get("parent") if node else None
 
         active_branch = None
         for b_name, tip_id in self.branches.items():
@@ -114,8 +124,12 @@ class HistoryTree:
         # Build reverse lookup: node_id -> branch name (walk each branch ancestry)
         node_to_branch: dict[str, str] = {}
         for b_name, tip_id in self.branches.items():
+            visited = set()
             current = tip_id
             while current and current in self.nodes:
+                if current in visited:
+                    break
+                visited.add(current)
                 if current not in node_to_branch:
                     node_to_branch[current] = b_name
                 current = self.nodes[current].get('parent')
@@ -154,13 +168,14 @@ class HistoryTree:
             full_note = n.get('note', 'Step')
 
             display_note = (full_note[:max_note_len] + '..') if len(full_note) > max_note_len else full_note
+            display_note = html.escape(display_note)
 
             ts = time.strftime('%b %d %H:%M', time.localtime(n['timestamp']))
 
             # Branch label for tip nodes
             branch_label = ""
             if nid in tip_to_branches:
-                branch_label = ", ".join(tip_to_branches[nid])
+                branch_label = html.escape(", ".join(tip_to_branches[nid]))
 
             # COLORS — per-branch tint, overridden for HEAD and tips
             b_name = node_to_branch.get(nid)
@@ -190,11 +205,18 @@ class HistoryTree:
                 + '</TABLE>>'
             )
 
-            safe_tooltip = full_note.replace('"', "'")
-            dot.append(f'  "{nid}" [label={label}, tooltip="{safe_tooltip}"];')
+            safe_tooltip = (full_note
+                .replace('\\', '\\\\')
+                .replace('"', '\\"')
+                .replace('\n', ' ')
+                .replace('\r', '')
+                .replace(']', '&#93;'))
+            safe_nid = nid.replace('"', '_')
+            dot.append(f'  "{safe_nid}" [label={label}, tooltip="{safe_tooltip}"];')
 
-            if n["parent"] and n["parent"] in self.nodes:
-                dot.append(f'  "{n["parent"]}" -> "{nid}";')
+            if n.get("parent") and n["parent"] in self.nodes:
+                safe_parent = n["parent"].replace('"', '_')
+                dot.append(f'  "{safe_parent}" -> "{safe_nid}";')
 
         dot.append("}")
         return "\n".join(dot)

main.py

@@ -1,3 +1,4 @@
+import copy
 import json
 import logging
 from pathlib import Path
@@ -156,6 +157,20 @@ def index():
             background: rgba(255,255,255,0.2);
         }
 
+        /* Sub-sequence accent colors (per sub-index, cycling) */
+        .body--dark .subsegment-color-0 > .q-expansion-item__container > .q-item { border-left: 6px solid #06B6D4; padding-left: 10px; }
+        .body--dark .subsegment-color-0 .q-expansion-item__toggle-icon { color: #06B6D4 !important; }
+        .body--dark .subsegment-color-1 > .q-expansion-item__container > .q-item { border-left: 6px solid #A78BFA; padding-left: 10px; }
+        .body--dark .subsegment-color-1 .q-expansion-item__toggle-icon { color: #A78BFA !important; }
+        .body--dark .subsegment-color-2 > .q-expansion-item__container > .q-item { border-left: 6px solid #34D399; padding-left: 10px; }
+        .body--dark .subsegment-color-2 .q-expansion-item__toggle-icon { color: #34D399 !important; }
+        .body--dark .subsegment-color-3 > .q-expansion-item__container > .q-item { border-left: 6px solid #F472B6; padding-left: 10px; }
+        .body--dark .subsegment-color-3 .q-expansion-item__toggle-icon { color: #F472B6 !important; }
+        .body--dark .subsegment-color-4 > .q-expansion-item__container > .q-item { border-left: 6px solid #FBBF24; padding-left: 10px; }
+        .body--dark .subsegment-color-4 .q-expansion-item__toggle-icon { color: #FBBF24 !important; }
+        .body--dark .subsegment-color-5 > .q-expansion-item__container > .q-item { border-left: 6px solid #FB923C; padding-left: 10px; }
+        .body--dark .subsegment-color-5 .q-expansion-item__toggle-icon { color: #FB923C !important; }
+
         /* Secondary pane teal accent */
         .pane-secondary .q-field--outlined.q-field--focused .q-field__control:after {
             border-color: #06B6D4 !important;
@@ -467,7 +482,7 @@ def render_sidebar(state: AppState, dual_pane: dict):
                     if not fn.endswith('.json'):
                         fn += '.json'
                     path = state.current_dir / fn
-                    first_item = DEFAULTS.copy()
+                    first_item = copy.deepcopy(DEFAULTS)
                     first_item[KEY_SEQUENCE_NUMBER] = 1
                     save_json(path, {KEY_BATCH_DATA: [first_item]})
                     new_fn_input.set_value('')
@@ -500,7 +515,7 @@ def render_sidebar(state: AppState, dual_pane: dict):
         state.show_comfy_monitor = e.value
         state._render_main.refresh()
 
-    ui.checkbox('Show Comfy Monitor', value=True, on_change=on_monitor_toggle)
+    ui.checkbox('Show Comfy Monitor', value=state.show_comfy_monitor, on_change=on_monitor_toggle)
 
 
 # Register REST API routes for ComfyUI connectivity (uses the shared DB instance)

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)
@@ -138,6 +139,7 @@ class ProjectLoaderDynamic:
                 "project_name": ("STRING", {"default": "", "multiline": False}),
                 "file_name": ("STRING", {"default": "", "multiline": False}),
                 "sequence_number": ("INT", {"default": 1, "min": 1, "max": 9999}),
+                "refresh": (["off", "on"],),
             },
             "optional": {
                 "output_keys": ("STRING", {"default": ""}),
@@ -152,7 +154,7 @@ class ProjectLoaderDynamic:
     OUTPUT_NODE = False
 
     def load_dynamic(self, manager_url, project_name, file_name, sequence_number,
-                     output_keys="", output_types=""):
+                     refresh="off", output_keys="", output_types=""):
         # Fetch keys metadata (includes total_sequences count)
         keys_meta = _fetch_keys(manager_url, project_name, file_name, sequence_number)
         if keys_meta.get("error") in ("http_error", "network_error", "parse_error"):

tab_batch_ng.py

@@ -1,4 +1,6 @@
 import copy
+import json
+import math
 import random
 from pathlib import Path
 
@@ -13,6 +15,7 @@ from history_tree import HistoryTree
 
 IMAGE_EXTENSIONS = {'.png', '.jpg', '.jpeg', '.webp', '.bmp', '.gif'}
 SUB_SEGMENT_MULTIPLIER = 1000
+SUB_SEGMENT_NUM_COLORS = 6
 FRAME_TO_SKIP_DEFAULT = DEFAULTS['frame_to_skip']
 
 VACE_MODES = [
@@ -76,6 +79,48 @@ def find_insert_position(batch_list, parent_index, parent_seq_num):
     return pos
 
 
+# --- Auto change note ---
+
+def _auto_change_note(htree, batch_list):
+    """Compare current batch_list against last snapshot and describe changes."""
+    # Get previous batch data from the current head
+    if not htree.head_id or htree.head_id not in htree.nodes:
+        return f'Initial save ({len(batch_list)} sequences)'
+
+    prev_data = htree.nodes[htree.head_id].get('data', {})
+    prev_batch = prev_data.get(KEY_BATCH_DATA, [])
+
+    prev_by_seq = {int(s.get(KEY_SEQUENCE_NUMBER, 0)): s for s in prev_batch}
+    curr_by_seq = {int(s.get(KEY_SEQUENCE_NUMBER, 0)): s for s in batch_list}
+
+    added = sorted(set(curr_by_seq) - set(prev_by_seq))
+    removed = sorted(set(prev_by_seq) - set(curr_by_seq))
+
+    changed_keys = set()
+    for seq_num in sorted(set(curr_by_seq) & set(prev_by_seq)):
+        old, new = prev_by_seq[seq_num], curr_by_seq[seq_num]
+        all_keys = set(old) | set(new)
+        for k in all_keys:
+            if old.get(k) != new.get(k):
+                changed_keys.add(k)
+
+    parts = []
+    if added:
+        parts.append(f'Added seq {", ".join(str(s) for s in added)}')
+    if removed:
+        parts.append(f'Removed seq {", ".join(str(s) for s in removed)}')
+    if changed_keys:
+        # Show up to 4 changed field names
+        keys_list = sorted(changed_keys)
+        if len(keys_list) > 4:
+            keys_str = ', '.join(keys_list[:4]) + f' +{len(keys_list) - 4} more'
+        else:
+            keys_str = ', '.join(keys_list)
+        parts.append(f'Changed: {keys_str}')
+
+    return '; '.join(parts) if parts else 'No changes detected'
+
+
 # --- Helper for repetitive dict-bound inputs ---
 
 def dict_input(element_fn, label, seq, key, **kwargs):
@@ -99,6 +144,8 @@ def dict_number(label, seq, key, default=0, **kwargs):
     try:
         # Try float first to handle "1.5" strings, then check if it's a clean int
         fval = float(val)
+        if not math.isfinite(fval):
+            fval = float(default)
         val = int(fval) if fval == int(fval) else fval
     except (ValueError, TypeError, OverflowError):
         val = default
@@ -109,6 +156,9 @@ def dict_number(label, seq, key, default=0, **kwargs):
         if v is None:
             v = d
         elif isinstance(v, float):
+            if not math.isfinite(v):
+                v = d
+            else:
                 try:
                     v = int(v) if v == int(v) else v
                 except (OverflowError, ValueError):
@@ -223,13 +273,13 @@ 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)
                     src_batch = _src_cache['batch']
                     sel_idx = src_seq_select.value
-                    if src_batch and sel_idx is not None:
+                    if src_batch and sel_idx is not None and int(sel_idx) < len(src_batch):
                         item.update(copy.deepcopy(src_batch[int(sel_idx)]))
                     elif _src_cache['data']:
                         item.update(copy.deepcopy(_src_cache['data']))
@@ -242,7 +292,7 @@ def render_batch_processor(state: AppState):
     lora_keys = ['lora 1 high', 'lora 1 low', 'lora 2 high', 'lora 2 low',
                  'lora 3 high', 'lora 3 low']
     standard_keys = {
-        'general_prompt', 'general_negative', 'current_prompt', 'negative', 'prompt',
+        'name', 'mode', 'general_prompt', 'general_negative', 'current_prompt', 'negative', 'prompt',
         'seed', 'cfg', 'camera', 'flf', KEY_SEQUENCE_NUMBER,
         'frame_to_skip', 'end_frame', 'transition', 'vace_length',
         'input_a_frames', 'input_b_frames', 'reference switch', 'vace schedule',
@@ -291,8 +341,12 @@ def render_batch_processor(state: AppState):
                 htree = HistoryTree(tree_data)
                 snapshot_payload = copy.deepcopy(data)
                 snapshot_payload.pop(KEY_HISTORY_TREE, None)
-                note = commit_input.value if commit_input.value else 'Batch Update'
+                note = commit_input.value if commit_input.value else _auto_change_note(htree, batch_list)
+                try:
                     htree.commit(snapshot_payload, note=note)
+                except ValueError as e:
+                    ui.notify(f'Save failed: {e}', type='negative')
+                    return
                 data[KEY_HISTORY_TREE] = htree.to_dict()
                 save_json(file_path, data)
                 if state.db_enabled and state.current_project and state.db:
@@ -321,21 +375,40 @@ def _render_sequence_card(i, seq, batch_list, data, file_path, state,
         refresh_list.refresh()
 
     seq_num = seq.get(KEY_SEQUENCE_NUMBER, i + 1)
+    seq_name = seq.get('name', '')
 
     if is_subsegment(seq_num):
         label = f'Sub #{parent_of(seq_num)}.{sub_index_of(seq_num)}  ({int(seq_num)})'
     else:
         label = f'Sequence #{seq_num}'
+    if seq_name:
+        label += f' — {seq_name}'
 
-    with ui.expansion(label, icon='movie').classes('w-full'):
+    if is_subsegment(seq_num):
+        color_idx = (sub_index_of(seq_num) - 1) % SUB_SEGMENT_NUM_COLORS
+        exp_classes = f'w-full subsegment-color-{color_idx}'
+    else:
+        exp_classes = 'w-full'
+    with ui.expansion(label, icon='movie').classes(exp_classes) as expansion:
         # --- Action row ---
         with ui.row().classes('w-full q-gutter-sm action-row'):
+            # Rename
+            async def rename(s=seq):
+                result = await ui.run_javascript(
+                    f'prompt("Rename sequence:", {json.dumps(s.get("name", ""))})',
+                    timeout=30.0,
+                )
+                if result is not None:
+                    s['name'] = result
+                    commit('Renamed!')
+
+            ui.button('Rename', icon='edit', on_click=rename).props('outline')
             # Copy from source
             def copy_source(idx=i, sn=seq_num):
                 item = copy.deepcopy(DEFAULTS)
                 src_batch = src_cache['batch']
                 sel_idx = src_seq_select.value
-                if src_batch and sel_idx is not None:
+                if src_batch and sel_idx is not None and int(sel_idx) < len(src_batch):
                     item.update(copy.deepcopy(src_batch[int(sel_idx)]))
                 elif src_cache['data']:
                     item.update(copy.deepcopy(src_cache['data']))
@@ -390,6 +463,7 @@ def _render_sequence_card(i, seq, batch_list, data, file_path, state,
 
             # Delete
             def delete(idx=i):
+                if idx < len(batch_list):
                     batch_list.pop(idx)
                     commit()
 
@@ -410,6 +484,9 @@ def _render_sequence_card(i, seq, batch_list, data, file_path, state,
                     'w-full q-mt-sm').props('outlined rows=2')
 
             with splitter.after:
+                # Mode
+                dict_number('Mode', seq, 'mode').props('outlined').classes('w-full')
+
                 # Sequence number
                 sn_label = (
                     f'Seq Number (Sub #{parent_of(seq_num)}.{sub_index_of(seq_num)})'
@@ -541,7 +618,13 @@ def _render_sequence_card(i, seq, batch_list, data, file_path, state,
 
 def _render_vace_settings(i, seq, batch_list, data, file_path, state, refresh_list):
     # VACE Schedule (needed early for both columns)
-    sched_val = max(0, min(int(seq.get('vace schedule', 1)), len(VACE_MODES) - 1))
+    def _safe_int(val, default=0):
+        try:
+            return int(float(val))
+        except (ValueError, TypeError, OverflowError):
+            return default
+
+    sched_val = max(0, min(_safe_int(seq.get('vace schedule', 1), 1), len(VACE_MODES) - 1))
 
     # Mode reference dialog
     with ui.dialog() as ref_dlg, ui.card():
@@ -562,18 +645,18 @@ def _render_vace_settings(i, seq, batch_list, data, file_path, state, refresh_li
                 fts_input = dict_number('Frame to Skip', seq, 'frame_to_skip').classes(
                     'col').props('outlined')
 
-                _original_fts = int(seq.get('frame_to_skip', FRAME_TO_SKIP_DEFAULT))
+                _original_fts = _safe_int(seq.get('frame_to_skip', FRAME_TO_SKIP_DEFAULT), FRAME_TO_SKIP_DEFAULT)
 
                 def shift_fts(idx=i, orig=_original_fts):
-                    new_fts = int(fts_input.value) if fts_input.value is not None else orig
+                    new_fts = _safe_int(fts_input.value, orig)
                     delta = new_fts - orig
                     if delta == 0:
                         ui.notify('No change to shift', type='info')
                         return
                     shifted = 0
                     for j in range(idx + 1, len(batch_list)):
-                        batch_list[j]['frame_to_skip'] = int(
-                            batch_list[j].get('frame_to_skip', FRAME_TO_SKIP_DEFAULT)) + delta
+                        batch_list[j]['frame_to_skip'] = _safe_int(
+                            batch_list[j].get('frame_to_skip', FRAME_TO_SKIP_DEFAULT), FRAME_TO_SKIP_DEFAULT) + delta
                         shifted += 1
                     data[KEY_BATCH_DATA] = batch_list
                     save_json(file_path, data)
@@ -597,7 +680,7 @@ def _render_vace_settings(i, seq, batch_list, data, file_path, state, refresh_li
                 ui.button(icon='help', on_click=ref_dlg.open).props('flat dense round')
 
                 def update_mode_label(e):
-                    idx = int(e.sender.value) if e.sender.value is not None else 0
+                    idx = _safe_int(e.sender.value, 0)
                     idx = max(0, min(idx, len(VACE_MODES) - 1))
                     mode_label.set_text(VACE_MODES[idx])
 
@@ -611,10 +694,10 @@ def _render_vace_settings(i, seq, batch_list, data, file_path, state, refresh_li
                 'outlined').classes('w-full q-mt-sm')
 
             # VACE Length + output calculation
-            input_a = int(seq.get('input_a_frames', 16))
-            input_b = int(seq.get('input_b_frames', 16))
-            stored_total = int(seq.get('vace_length', 49))
-            mode_idx = int(seq.get('vace schedule', 1))
+            input_a = _safe_int(seq.get('input_a_frames', 16), 16)
+            input_b = _safe_int(seq.get('input_b_frames', 16), 16)
+            stored_total = _safe_int(seq.get('vace_length', 49), 49)
+            mode_idx = _safe_int(seq.get('vace schedule', 1), 1)
 
             if mode_idx == 0:
                 base_length = max(stored_total - input_a, 1)
@@ -633,10 +716,10 @@ def _render_vace_settings(i, seq, batch_list, data, file_path, state, refresh_li
 
     # Recalculate VACE output when any input changes
     def recalc_vace(*_args):
-        mi = int(vs_input.value) if vs_input.value is not None else 0
-        ia = int(ia_input.value) if ia_input.value is not None else 16
-        ib = int(ib_input.value) if ib_input.value is not None else 16
-        nb = int(vl_input.value) if vl_input.value is not None else 1
+        mi = _safe_int(vs_input.value, 0)
+        ia = _safe_int(ia_input.value, 16)
+        ib = _safe_int(ib_input.value, 16)
+        nb = _safe_int(vl_input.value, 1)
 
         if mi == 0:
             raw = nb + ia
@@ -721,7 +804,11 @@ def _render_mass_update(batch_list, data, file_path, state: AppState, refresh_li
             htree = HistoryTree(data.get(KEY_HISTORY_TREE, {}))
             snapshot = copy.deepcopy(data)
             snapshot.pop(KEY_HISTORY_TREE, None)
+            try:
                 htree.commit(snapshot, f"Mass update: {', '.join(selected_keys)}")
+            except ValueError as e:
+                ui.notify(f'Mass update failed: {e}', type='negative')
+                return
             data[KEY_HISTORY_TREE] = htree.to_dict()
             save_json(file_path, data)
             if state.db_enabled and state.current_project and state.db:

tab_comfy_ng.py

@@ -139,7 +139,7 @@ def _render_single_instance(state: AppState, instance_config: dict, index: int,
 
     async def refresh_status():
         status_container.clear()
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
         res, err = await loop.run_in_executor(
             None, lambda: _fetch_blocking(f'{comfy_url}/queue'))
         with status_container:
@@ -237,7 +237,7 @@ def _render_single_instance(state: AppState, instance_config: dict, index: int,
 
         async def check_image():
             img_container.clear()
-            loop = asyncio.get_event_loop()
+            loop = asyncio.get_running_loop()
             res, err = await loop.run_in_executor(
                 None, lambda: _fetch_blocking(f'{comfy_url}/history', timeout=2))
             with img_container:

tab_projects_ng.py

@@ -1,11 +1,13 @@
+import json
 import logging
+import sqlite3
 from pathlib import Path
 
 from nicegui import ui
 
 from state import AppState
 from db import ProjectDB
-from utils import save_config, sync_to_db, KEY_BATCH_DATA
+from utils import save_config, sync_to_db
 
 logger = logging.getLogger(__name__)
 
@@ -109,6 +111,49 @@ def render_projects_tab(state: AppState):
                                 ui.button('Deactivate', icon='cancel',
                                           on_click=deactivate).props('flat dense')
 
+                            async def rename_proj(name=proj['name']):
+                                new_name = await ui.run_javascript(
+                                    f'prompt("Rename project:", {json.dumps(name)})',
+                                    timeout=30.0,
+                                )
+                                if new_name and new_name.strip() and new_name.strip() != name:
+                                    new_name = new_name.strip()
+                                    try:
+                                        state.db.rename_project(name, new_name)
+                                        if state.current_project == name:
+                                            state.current_project = new_name
+                                            state.config['current_project'] = new_name
+                                            save_config(state.current_dir,
+                                                        state.config.get('favorites', []),
+                                                        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')
+
+                            ui.button('Rename', icon='edit',
+                                      on_click=rename_proj).props('flat dense')
+
+                            async def change_path(name=proj['name'], path=proj['folder_path']):
+                                new_path = await ui.run_javascript(
+                                    f'prompt("New path for project:", {json.dumps(path)})',
+                                    timeout=30.0,
+                                )
+                                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()
+
+                            ui.button('Path', icon='folder',
+                                      on_click=change_path).props('flat dense')
+
                             def import_folder(pid=proj['id'], pname=proj['name']):
                                 _import_folder(state, pid, pname, render_project_list)
 

tab_timeline_ng.py

@@ -1,4 +1,5 @@
 import copy
+import json
 import time
 
 from nicegui import ui
@@ -9,14 +10,36 @@ from utils import save_json, sync_to_db, KEY_BATCH_DATA, KEY_HISTORY_TREE
 
 
 def _delete_nodes(htree, data, file_path, node_ids):
-    """Delete nodes with backup, branch cleanup, and head fallback."""
+    """Delete nodes with backup, branch cleanup, re-parenting, and head fallback."""
     if 'history_tree_backup' not in data:
         data['history_tree_backup'] = []
     data['history_tree_backup'].append(copy.deepcopy(htree.to_dict()))
+    data['history_tree_backup'] = data['history_tree_backup'][-10:]
+    # Save deleted node parents before removal (needed for branch re-pointing)
+    deleted_parents = {}
+    for nid in node_ids:
+        deleted_node = htree.nodes.get(nid)
+        if deleted_node:
+            deleted_parents[nid] = deleted_node.get('parent')
+    # Re-parent children of deleted nodes — walk up to find a surviving ancestor
+    for nid in node_ids:
+        surviving_parent = deleted_parents.get(nid)
+        while surviving_parent in node_ids:
+            surviving_parent = deleted_parents.get(surviving_parent)
+        for child in htree.nodes.values():
+            if child.get('parent') == nid:
+                child['parent'] = surviving_parent
     for nid in node_ids:
         htree.nodes.pop(nid, None)
+    # Re-point branches whose tip was deleted to a surviving ancestor
     for b, tip in list(htree.branches.items()):
         if tip in node_ids:
+            new_tip = deleted_parents.get(tip)
+            while new_tip in node_ids:
+                new_tip = deleted_parents.get(new_tip)
+            if new_tip and new_tip in htree.nodes:
+                htree.branches[b] = new_tip
+            else:
                 del htree.branches[b]
     if htree.head_id in node_ids:
         if htree.nodes:
@@ -152,8 +175,12 @@ def _render_batch_delete(htree, data, file_path, state, refresh_fn):
 def _walk_branch_nodes(htree, tip_id):
     """Walk parent pointers from tip, returning nodes newest-first."""
     nodes = []
+    visited = set()
     current = tip_id
     while current and current in htree.nodes:
+        if current in visited:
+            break
+        visited.add(current)
         nodes.append(htree.nodes[current])
         current = htree.nodes[current].get('parent')
     return nodes
@@ -172,10 +199,14 @@ def _find_active_branch(htree):
 def _find_branch_for_node(htree, node_id):
     """Return the branch name whose ancestry contains node_id, or None."""
     for b_name, tip_id in htree.branches.items():
+        visited = set()
         current = tip_id
         while current and current in htree.nodes:
+            if current in visited:
+                break
             if current == node_id:
                 return b_name
+            visited.add(current)
             current = htree.nodes[current].get('parent')
     return None
 
@@ -310,6 +341,10 @@ def _render_node_manager(all_nodes, htree, data, file_path, restore_fn, refresh_
                     _delete_nodes(htree, data, file_path, {sel_id})
                     if state and state.db_enabled and state.current_project and state.db:
                         sync_to_db(state.db, state.current_project, file_path, data)
+                    # Reset selection if branch was removed
+                    if selected['branch'] not in htree.branches:
+                        selected['branch'] = next(iter(htree.branches), None)
+                    selected['node_id'] = htree.head_id
                     ui.notify('Node Deleted', type='positive')
                     refresh_fn()
 
@@ -433,7 +468,7 @@ def _render_graphviz(dot_source: str, selected_node_id: str | None = None):
         src = graphviz.Source(dot_source)
         svg = src.pipe(format='svg').decode('utf-8')
 
-        sel_escaped = selected_node_id.replace("'", "\\'") if selected_node_id else ''
+        sel_escaped = json.dumps(selected_node_id or '')[1:-1]  # strip quotes, get JS-safe content
 
         # CSS inline (allowed), JS via run_javascript (script tags blocked)
         css = '''<style>
@@ -490,11 +525,18 @@ def _render_graphviz(dot_source: str, selected_node_id: str | None = None):
 
 
 def _restore_node(data, node, htree, file_path, state: AppState):
-    """Restore a history node as the current version."""
-    node_data = copy.deepcopy(node['data'])
-    if KEY_BATCH_DATA not in node_data and KEY_BATCH_DATA in data:
-        del data[KEY_BATCH_DATA]
+    """Restore a history node as the current version (full replace, not merge)."""
+    node_data = copy.deepcopy(node.get('data', {}))
+    # Preserve the history tree before clearing
+    preserved_tree = data.get(KEY_HISTORY_TREE)
+    preserved_backup = data.get('history_tree_backup')
+    data.clear()
     data.update(node_data)
+    # Re-attach history tree (not part of snapshot data)
+    if preserved_tree is not None:
+        data[KEY_HISTORY_TREE] = preserved_tree
+    if preserved_backup is not None:
+        data['history_tree_backup'] = preserved_backup
     htree.head_id = node['id']
     data[KEY_HISTORY_TREE] = htree.to_dict()
     save_json(file_path, data)
@@ -511,7 +553,7 @@ def _render_data_preview(nid, htree):
         ui.label('No node selected.').classes('text-caption')
         return
 
-    node_data = htree.nodes[nid]['data']
+    node_data = htree.nodes[nid].get('data', {})
     batch_list = node_data.get(KEY_BATCH_DATA, [])
 
     if batch_list and isinstance(batch_list, list) and len(batch_list) > 0:

utils.py

@@ -1,3 +1,4 @@
+import copy
 import json
 import logging
 import os
@@ -30,6 +31,7 @@ DEFAULTS = {
     "cfg": 1.5,
 
     # --- Settings ---
+    "mode": 0,
     "camera": "static",
     "flf": 0.0,
 
@@ -112,14 +114,17 @@ def save_config(current_dir, favorites, extra_data=None):
     existing = load_config()
     data.update(existing)
     
-    data["last_dir"] = str(current_dir)
-    data["favorites"] = favorites
-    
     if extra_data:
         data.update(extra_data)
 
-    with open(CONFIG_FILE, 'w') as f:
+    # Force-set explicit params last so extra_data can't override them
+    data["last_dir"] = str(current_dir)
+    data["favorites"] = favorites
+
+    tmp = CONFIG_FILE.with_suffix('.json.tmp')
+    with open(tmp, 'w') as f:
         json.dump(data, f, indent=4)
+    os.replace(tmp, CONFIG_FILE)
 
 def load_snippets():
     if SNIPPETS_FILE.exists():
@@ -131,8 +136,10 @@ def load_snippets():
     return {}
 
 def save_snippets(snippets):
-    with open(SNIPPETS_FILE, 'w') as f:
+    tmp = SNIPPETS_FILE.with_suffix('.json.tmp')
+    with open(tmp, 'w') as f:
         json.dump(snippets, f, indent=4)
+    os.replace(tmp, SNIPPETS_FILE)
 
 def load_json(path: str | Path) -> tuple[dict[str, Any], float]:
     path = Path(path)
@@ -181,7 +188,7 @@ 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 (?, ?, ?, ?, ?, ?)",
@@ -191,7 +198,7 @@ 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),
@@ -205,17 +212,18 @@ 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 (?, ?, ?, ?)",
+                        "VALUES (?, ?, ?, ?) "
+                        "ON CONFLICT(data_file_id, sequence_number) DO UPDATE SET data=excluded.data, updated_at=excluded.updated_at",
                         (df_id, seq_num, json.dumps(item), now),
                     )
 
             # 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 (?, ?, ?) "
@@ -236,10 +244,10 @@ 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]})

web/project_dynamic.js

@@ -34,7 +34,7 @@ app.registerExtension({
 
             // Auto-refresh with 500ms debounce on widget changes
             this._refreshTimer = null;
-            const autoRefreshWidgets = ["project_name", "file_name", "sequence_number"];
+            const autoRefreshWidgets = ["project_name", "file_name", "sequence_number", "refresh"];
             for (const widgetName of autoRefreshWidgets) {
                 const w = this.widgets?.find(w => w.name === widgetName);
                 if (w) {
@@ -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
-                ? okWidget.value.split(",").filter(k => k.trim())
-                : [];
-            const types = otWidget?.value
-                ? otWidget.value.split(",")
-                : [];
+            let keys = [];
+            let types = [];
+            if (okWidget?.value) {
+                try { keys = JSON.parse(okWidget.value); } catch (_) {
+                    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") {
@@ -245,8 +251,8 @@ app.registerExtension({
             } else if (this.outputs.length > 1) {
                 // Widget values empty but serialized dynamic outputs exist — sync widgets
                 const dynamicOutputs = this.outputs.slice(1);
-                if (okWidget) okWidget.value = dynamicOutputs.map(o => o.name).join(",");
-                if (otWidget) otWidget.value = dynamicOutputs.map(o => o.type).join(",");
+                if (okWidget) okWidget.value = JSON.stringify(dynamicOutputs.map(o => o.name));
+                if (otWidget) otWidget.value = JSON.stringify(dynamicOutputs.map(o => o.type));
             }
 
             this.setSize(this.computeSize());