feat: taskId 深链会商按任务隔离草稿 + 第三步自动结构化流程图

- 深链 ?taskId=&goPath=*-A 透传 taskId 进会商，按 taskId 隔离存取草稿（一个 taskId 多条、可新建）；
  后端新增 GET /api/roundtable-drafts/by-task/{id} 列表 + RoundtableJobRepository.status_map_by_drafts 富化。
- 第三步生成 md 报告后自动结构化输出流程图（仅 taskId 模式）：有报告基于报告、无报告基于各席位交付，
  整段内联数据来源逐条抽取；层级优先用业务链总控提示词写明的层级，否则用 stages 的 goal。
- 流程图节点加 group(层级名)标签 + detail(条目名称+理由)；强 prompt 压制 coordinatorPrompt 报告锚定，
  禁阶段编号节点；FLOW_STRUCTURE_RULE 精确画法（根=任务、每层每条成节点、按对应关系串分支、排除汇总段落）。
- flow-graph 解析容错：JSON.parse 失败退回正则逐字段抽取，兼容裸换行/尾逗号，避免节点被整体丢弃。
- 修：重开第二步后第三步基于新一轮分析重新生成（复位 step3 闸门 + 中断旧三流）。

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

CLAUDE.md

@@ -86,7 +86,7 @@ The frontend (`frontend-web/`) is a React 19 + Vite SPA:
 - **LLM streaming**: `@langchain/langgraph-sdk` streams messages from the backend via SSE
 - **UI**: Radix UI primitives + TailwindCSS v4 + shadcn-style components in `src/components/ui/`
 - **Shims**: `src/shims/` provides `next/link` and `next/navigation` polyfills (original code was Next.js)
-- **Login URL params** (`LoginPage.tsx`, frontend-only — the backend never sees these): besides the auth params (`ticket`/`userId`/`env`/`theme`/`yUserId`/`token`/`access_token`/`authToken`/`password`), the page supports a **task deep-link** via `?taskId=&goPath=`. After login it calls the consumer API `GET {VITE_AIPI_CONSUMER_URL}/taskAnalyseSearch/cop-task-detail?taskId=` (header `Authorization: Bearer admin`, auto-injected by `utils/request.ts`), stashes the full `data` (`id/overview/taskDirection/taskName/taskContent`) into `sessionStorage["login.copTaskDetail"]`, then routes by `goPath`: base codes `3qfx`/`rwfx`/`xdfx` → that business's configured **single agent** Q&A (resolved via `/api/business-mapping`, opening message in `sessionStorage.pendingAgentMessage`); the `-A` suffix (`3qfx-A`/…) → **multi-agent roundtable** with `roundtablePrefill.businessCode` so the page auto-selects the configured 业务链条. goPath→businessCode: `3qfx`→`3Q`, `rwfx`→`6BF`, `xdfx`→`7BF`. **Both targets render embedded under the 任务管理 layout** — nested routes under `task-management/<business-path>/{roundtable,agent/:agent_id/chats/:thread_id}` in `StrategyRoutes.tsx` (`<business-path>` = `plan-task-sentiment` / `plan-task/plan-task-fx` / `plan-task/plan-task-action`, matching the COH中任务 menu paths in `sidebar-menu.ts`) so the global sidebar keeps 任务管理 → COH中任务 → the matching business highlighted. The agent chat is rendered via `TaskEmbeddedAgentChat`, which passes `AgentChatPage`'s `chatBasePath` prop so the post-send URL rewrite + new-chat button stay in the task-management context (instead of the standalone `/agents/...` route). Any failure (no consumer URL / fetch error / unmapped goPath / no configured agent) silently falls back to the default home. Helpers: `core/auth/task-deeplink.ts`.
+- **Login URL params** (`LoginPage.tsx`, frontend-only — the backend never sees these): besides the auth params (`ticket`/`userId`/`env`/`theme`/`yUserId`/`token`/`access_token`/`authToken`/`password`), the page supports a **task deep-link** via `?taskId=&goPath=`. After login it calls the consumer API `GET {VITE_AIPI_CONSUMER_URL}/taskAnalyseSearch/cop-task-detail?taskId=` (header `Authorization: Bearer admin`, auto-injected by `utils/request.ts`), stashes the full `data` (`id/overview/taskDirection/taskName/taskContent`) into `sessionStorage["login.copTaskDetail"]`, then routes by `goPath`: base codes `3qfx`/`rwfx`/`xdfx` → that business's configured **single agent** Q&A (resolved via `/api/business-mapping`, opening message in `sessionStorage.pendingAgentMessage`); the `-A` suffix (`3qfx-A`/…) → **multi-agent roundtable** with `roundtablePrefill.businessCode` so the page auto-selects the configured 业务链条. goPath→businessCode: `3qfx`→`3Q`, `rwfx`→`6BF`, `xdfx`→`7BF`. The roundtable target also threads the URL `taskId` into `roundtablePrefill.taskId` (`resolveTaskDeeplinkTarget(goPath, detail, taskId)`), which turns on two taskId-scoped behaviors: (1) **per-task draft isolation** — drafts save/list/restore by `task_id` (one taskId = many records, shared across users; backend `GET /api/roundtable-drafts/by-task/{id}` + `/latest`); the history dropdown filters to the task and 新建 keeps the binding; (2) **Step-3 auto structured output** — after the `roundtable-summary` agent writes the Markdown report it automatically runs a second round emitting a `flow-json` flowchart (`useStep3Summary` `autoFlow`+`chainLevels`), whose hierarchy follows the business chain's stage goals (任务 → 目的 → 行为体 → …; coordinatorPrompt-specified hierarchy wins) and whose nodes never carry 阶段编号/阶段名 (the prior bug). **Both targets render embedded under the 任务管理 layout** — nested routes under `task-management/<business-path>/{roundtable,agent/:agent_id/chats/:thread_id}` in `StrategyRoutes.tsx` (`<business-path>` = `plan-task-sentiment` / `plan-task/plan-task-fx` / `plan-task/plan-task-action`, matching the COH中任务 menu paths in `sidebar-menu.ts`) so the global sidebar keeps 任务管理 → COH中任务 → the matching business highlighted. The agent chat is rendered via `TaskEmbeddedAgentChat`, which passes `AgentChatPage`'s `chatBasePath` prop so the post-send URL rewrite + new-chat button stay in the task-management context (instead of the standalone `/agents/...` route). Any failure (no consumer URL / fetch error / unmapped goPath / no configured agent) silently falls back to the default home. Helpers: `core/auth/task-deeplink.ts`.
 
 ### Configuration