diff --git a/__pycache__/app.py.cpython-313.pyc b/__pycache__/app.py.cpython-313.pyc
index a570823..5372173 100644
Binary files a/__pycache__/app.py.cpython-313.pyc and b/__pycache__/app.py.cpython-313.pyc differ
diff --git a/app.py.final b/app.py.final
index 181c668..13689de 100644
--- a/app.py.final
+++ b/app.py.final
@@ -52,10 +52,13 @@ class TasksProxy:
     def __setitem__(self, key, value):
         with _task_lock:
             tasks = _load_tasks()
-            tasks[key] = value
+            if isinstance(value, dict):
+                tasks[key] = value
+            else:
+                tasks[key] = value
             _save_tasks(tasks)
     def __getitem__(self, key):
-        return _load_tasks()[key]
+        return _TaskDict(key)
     def __contains__(self, key):
         return key in _load_tasks()
     def pop(self, key, *args):
@@ -65,6 +68,21 @@ class TasksProxy:
             _save_tasks(tasks)
             return result
 
+class _TaskDict(dict):
+    """Auto-saving dict wrapper for a single task."""
+    def __init__(self, task_id):
+        self._task_id = task_id
+        tasks = _load_tasks()
+        super().__init__(tasks.get(task_id, {}))
+    def __setitem__(self, key, value):
+        super().__setitem__(key, value)
+        with _task_lock:
+            tasks = _load_tasks()
+            if self._task_id not in tasks:
+                tasks[self._task_id] = {}
+            tasks[self._task_id][key] = value
+            _save_tasks(tasks)
+
 TASKS = TasksProxy()
 
 # ========== UTILITY FUNCTIONS ==========
diff --git a/index.html.final b/index.html.final
index 6930367..1d12a82 100644
--- a/index.html.final
+++ b/index.html.final
@@ -2198,9 +2198,9 @@ function renderCoverage() {
       const x1 = ml + ((seg.startDate.getTime() - tMin) / tRange) * pw;
       const w = Math.max(2, ((seg.duration_sec || 0) / (tRange / 1000)) * pw);
       const color = lineColorMap[seg.line] || '#666';
-      const escapedFn = seg.filename.replace(/'/g, "\\'");
+      const escapedFn = (seg.filename||seg.name).replace(/'/g, "\\'");
       svg += `<rect x="${x1}" y="${y + 1}" width="${w}" height="${rowH - 2}" fill="${color}" rx="2" opacity="0.8" style="cursor:pointer" onclick="coverageClickFile('${escapedFn}')">`;
-      svg += `<title>${seg.filename}\nBoard: ${seg.board_id || '?'}\nLine: ${seg.line || '?'} Point: ${seg.point || '?'}\nDuration: ${((seg.duration_sec || 0) / 3600).toFixed(1)}h\nStart: ${seg.date_str}</title>`;
+      svg += `<title>${(seg.filename||seg.name)}\nBoard: ${seg.board_id || '?'}\nLine: ${seg.line || '?'} Point: ${seg.point || '?'}\nDuration: ${((seg.duration_sec || 0) / 3600).toFixed(1)}h\nStart: ${seg.date_str}</title>`;
       svg += `</rect>`;
     });
   });