优化: 前端DRY收敛与命名对齐

审批等待格式化与阈值沉 utils/time 正典
相对时间阶梯三套收敛 formatRelative 参数化
灵感状态表沉 constants,透传通道退役
aggText/clearOwn 等命名对齐,IPC 参数名统一 conversation_id

src/mocks/tauri-shim.ts

@@ -253,7 +253,7 @@ const SCALAR_COMMANDS: Record<string, () => unknown> = {
   settings_get_all: () => ({}),
   settings_set: () => true,
   settings_delete: () => true,
-  get_plan_execution: () => false,
+  is_plan_execution_enabled: () => false,
   get_data_dir: () => 'C:\\devflow-browser-mock-data',
   ai_is_generating: () => false,
   list_tool_executions: () => ({ items: [], total: 0, has_more: false }),