feat: add Orchestrator Loop — phased plan execution with team agents

Adds a new autonomous loop that accepts high-level goals, generates
phased execution plans via AI, and executes them step-by-step with
verification gates between phases.

Core components:
- OrchestratorLoop: state machine (idle→planning→approval→executing→verifying→completed)
- OrchestratorPlanner: plan generation via PlanOrchestrator, Kahn's algorithm phase grouping
- OrchestratorVerifier: phase verification (strict/moderate/lenient modes)
- Prompt templates for phase execution, team delegation, verification, replanning

API (10 endpoints):
- POST start/approve/reject/pause/resume/stop
- GET status/plan
- POST phase/:id/skip, phase/:id/retry

Frontend: orchestrator-panel.js with SSE-driven state, phase progress, task tracking

Tests: 22 tests (18 route + 4 unit), all passing. Typecheck/lint/format clean.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/web/ports/index.ts

@@ -12,3 +12,4 @@ export type { RespawnPort } from './respawn-port.js';
 export type { ConfigPort } from './config-port.js';
 export type { InfraPort, ScheduledRun } from './infra-port.js';
 export type { AuthPort, AuthSessionRecord } from './auth-port.js';
+export type { OrchestratorPort } from './orchestrator-port.js';

src/web/ports/orchestrator-port.ts

@@ -0,0 +1,11 @@
+/**
+ * @fileoverview Orchestrator port — capabilities for orchestrator loop management.
+ * Route modules that interact with the orchestrator depend on this port.
+ */
+
+import type { OrchestratorLoop } from '../../orchestrator-loop.js';
+
+export interface OrchestratorPort {
+  readonly orchestratorLoop: OrchestratorLoop | null;
+  initOrchestratorLoop(): OrchestratorLoop;
+}