app 装配 mail:channel 作首个订阅方、出站经 mail.send、mail.send 工具真发信(dryRun 只校验)、轮询工作者;上传件存取抽出共用

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01TM4kUBvekALu9qqmp7D3wr

apps/api/src/app/tools/first-party.ts

@@ -286,15 +286,6 @@ const rankKeyPersons: ToolHandler = async ({ input }) => {
   return { ok: true, output: { ranked, counts } };
 };
 
-/** 出站发送 —— 写类:过程中登记为动作意向,放行后由系统执行落地(OS 7.3) */
-const mailSend: ToolHandler = async ({ input, connection }) => {
-  // 运行时只拿得到申报过的连接目标;真发信由 channel 的出站面承担
-  return {
-    ok: true,
-    output: { queued: true, to: String(input['to'] ?? ''), via: connection['endpoint'] ?? 'simulated' },
-  };
-};
-
 /* ── 活动槽位的占位产出(编排层跑通期专用) ─────────────────────────────
  *
  * 六个活动都只有契约面、没有实现。而出口载荷只从**落地事实**推导,
@@ -349,7 +340,6 @@ export const FIRST_PARTY_TOOLS: ReadonlyArray<readonly [string, ToolHandler]> =
   ['quote-pricing.floor-gate', floorGate],
   ['quote-archive.profile', profile],
   ['quote-archive.landing-rate', landingRate],
-  ['mail.send', mailSend],
   ['slot.placeholder', slotPlaceholder],
   ['crm-relationship-coverage.recompute-score', recomputeScore],
   ['crm-relationship-coverage.rank-key-persons', rankKeyPersons],