重构: P0前端架构(useAiSend/useAiEvents/useToolCard拆分+status union全)

squash合并:
- P0-1 useAiSend审批抽离(useAiApproval)
- P0-2 useAiEvents switch拆3域handler
- P0-3 useToolCard formatToolResult策略表
- P0-4 status union(Idea+Task+Project+Workflow+AiToolCall)

src/api/types.ts

@@ -36,11 +36,17 @@ export interface CreateIdeaInput {
 // 项目
 // ============================================================
 
+// ProjectRecord.status union 类型 — 值集对齐后端 ProjectStatus serde (df-types/src/types.rs:90)
+// snake_case: planning | in_progress | testing | releasing | completed | paused | cancelled
+// 注:前端 constants/dashboard 的 'active' 是 UI 虚拟派生态(非 record 落库值),不进此 union。
+export type ProjectStatus =
+  | 'planning' | 'in_progress' | 'testing' | 'releasing' | 'completed' | 'paused' | 'cancelled'
+
 export interface ProjectRecord {
   id: string
   name: string
   description: string
-  status: string // planning | in_progress | testing | releasing | completed | paused
+  status: ProjectStatus
   idea_id: string | null
   /** 绑定的本地代码目录绝对路径(null=未绑定) */
   path: string | null
@@ -84,12 +90,19 @@ export interface PromotionResult {
 // 任务
 // ============================================================
 
+// TaskRecord.status union 类型 — 值集对齐后端 TaskStatus serde (df-types/src/types.rs:131)
+// snake_case: todo | in_progress | in_review | testing | done | blocked | cancelled
+// 注:constants/project.ts 的 mapLegacyStatus 兜底老 DB 旧态(completed/review_ready/merged/abandoned),
+// 仅在 taskStatusLabel/taskStatusClass 辅助函数内映射,record.status 本身经后端 is_valid 拦截无旧态。
+export type TaskStatus =
+  | 'todo' | 'in_progress' | 'in_review' | 'testing' | 'done' | 'blocked' | 'cancelled'
+
 export interface TaskRecord {
   id: string
   project_id: string
   title: string
   description: string
-  status: string // todo | in_progress | in_review | testing | done | blocked | cancelled
+  status: TaskStatus
   priority: number // 0=critical, 1=high, 2=medium, 3=low
   branch_name: string | null
   assignee: string | null
@@ -121,11 +134,16 @@ export interface CreateTaskInput {
 // 工作流
 // ============================================================
 
+// WorkflowRecord.status union 类型 — 值集对齐后端 WorkflowStatus serde (df-types/src/types.rs:195)
+// snake_case: pending | running | paused | completed | failed | cancelled
+export type WorkflowStatus =
+  | 'pending' | 'running' | 'paused' | 'completed' | 'failed' | 'cancelled'
+
 export interface WorkflowRecord {
   id: string
   name: string
   dag_json: string
-  status: string // running | completed | failed | cancelled
+  status: WorkflowStatus
   triggered_by: string | null
   project_id: string | null
   task_id: string | null
@@ -320,12 +338,17 @@ export interface AiMessage {
   timestamp: number
 }
 
+// AiToolCallInfo.status union 类型 — 前端构建(后端无对应 struct,经 audit log/stream event 组装)。
+// 值集核验:grep src/composables/ai + src/components 实际使用点 = {running,pending_approval,completed,rejected}。
+// 前端为权威源(无后端 enum 约束),保持现状仅抽 alias 便于复用。
+export type AiToolCallStatus = 'running' | 'pending_approval' | 'completed' | 'rejected'
+
 /** 工具调用信息 */
 export interface AiToolCallInfo {
   id: string
   name: string
   args: unknown
-  status: 'running' | 'pending_approval' | 'completed' | 'rejected'
+  status: AiToolCallStatus
   result?: unknown
   /** 审批风险说明（AiApprovalRequired 时填充） */
   reason?: string