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/components/shared/TaskDrawer.tsx

@@ -382,7 +382,7 @@ export function TaskDrawer({ task, isOpen, onClose }: TaskDrawerProps) {
               {/* Flowchart Tab */}
               {hasFlowchart && (
                 <TabsContent value="flowchart" className="mt-4 pb-6">
-                  <Flowchart flowControl={flowControl!} className="min-h-[400px]" />
+                  <Flowchart flowControl={flowControl!} className="min-h-[400px]" showStepStatus={hasStatusTracking} />
                 </TabsContent>
               )}