feat: Add Phase 6 for Post-Implementation Review and enhance workflow execution

- Introduced Phase 6: Post-Implementation Review with detailed steps for specialized reviews (quality, security, architecture, action items).
- Updated SKILL.md to reflect new phase and its execution lifecycle.
- Enhanced Flowchart component to conditionally display step statuses based on task tracking.
- Modified TaskDrawer to pass status tracking prop to Flowchart.
- Improved AgentList and other terminal dashboard components for better UI consistency and responsiveness.
- Removed GlobalKpiBar component as part of UI cleanup.
- Added issue detail preview in TerminalWorkbench for better user experience when no terminal is active.
- Updated localization files for new strings related to the terminal dashboard and workbench.
- Enhanced TaskListTab to conditionally render task stats and status dropdown based on task status tracking.

ccw/frontend/src/pages/session-detail/TaskListTab.tsx

@@ -44,6 +44,14 @@ export function TaskListTab({ session, onTaskClick }: TaskListTabProps) {
   const { formatMessage } = useIntl();
 
   const tasks = session.tasks || [];
+
+  // Detect if session tasks support status tracking (new format has explicit status/status_history in raw data)
+  const hasStatusTracking = tasks.some((t) => {
+    const raw = (t as unknown as Record<string, unknown>)._raw as Record<string, unknown> | undefined;
+    const source = (raw?._raw as Record<string, unknown>) || raw;
+    return source ? (source.status !== undefined || source.status_history !== undefined) : false;
+  });
+
   const completed = tasks.filter((t) => t.status === 'completed').length;
   const inProgress = tasks.filter((t) => t.status === 'in_progress').length;
   const pending = tasks.filter((t) => t.status === 'pending').length;
@@ -165,18 +173,20 @@ export function TaskListTab({ session, onTaskClick }: TaskListTabProps) {
 
   return (
     <div className="space-y-4">
-      {/* Stats Bar with Bulk Actions */}
-      <TaskStatsBar
-        completed={completed}
-        inProgress={inProgress}
-        pending={pending}
-        onMarkAllPending={handleMarkAllPending}
-        onMarkAllInProgress={handleMarkAllInProgress}
-        onMarkAllCompleted={handleMarkAllCompleted}
-        isLoadingPending={isLoadingPending}
-        isLoadingInProgress={isLoadingInProgress}
-        isLoadingCompleted={isLoadingCompleted}
-      />
+      {/* Stats Bar with Bulk Actions (only for tasks with status tracking) */}
+      {hasStatusTracking && (
+        <TaskStatsBar
+          completed={completed}
+          inProgress={inProgress}
+          pending={pending}
+          onMarkAllPending={handleMarkAllPending}
+          onMarkAllInProgress={handleMarkAllInProgress}
+          onMarkAllCompleted={handleMarkAllCompleted}
+          isLoadingPending={isLoadingPending}
+          isLoadingInProgress={isLoadingInProgress}
+          isLoadingCompleted={isLoadingCompleted}
+        />
+      )}
 
       {/* Tasks List */}
       {localTasks.length === 0 ? (
@@ -236,12 +246,14 @@ export function TaskListTab({ session, onTaskClick }: TaskListTabProps) {
 
                     {/* Right: Status and Meta info */}
                     <div className="flex flex-col items-end gap-2 flex-shrink-0">
-                      {/* Row 1: Status dropdown */}
-                      <TaskStatusDropdown
-                        currentStatus={task.status as TaskStatus}
-                        onStatusChange={(newStatus) => handleTaskStatusChange(task.task_id, newStatus)}
-                        size="sm"
-                      />
+                      {/* Row 1: Status dropdown (only for tasks with status tracking) */}
+                      {hasStatusTracking && (
+                        <TaskStatusDropdown
+                          currentStatus={task.status as TaskStatus}
+                          onStatusChange={(newStatus) => handleTaskStatusChange(task.task_id, newStatus)}
+                          size="sm"
+                        />
+                      )}
 
                       {/* Row 2: Meta info */}
                       <div className="flex items-center gap-3 flex-wrap justify-end text-xs text-muted-foreground">