Add task detail view, pipeline visualization, approve/reject workflow

API (web/api.py) — 5 new endpoints:
  GET  /api/tasks/{id}/pipeline — agent_logs as pipeline steps
  GET  /api/tasks/{id}/full — task + steps + related decisions
  POST /api/tasks/{id}/approve — mark done, optionally add decision
  POST /api/tasks/{id}/reject — return to pending with reason
  POST /api/tasks/{id}/run — launch pipeline in background (202)

Frontend:
  TaskDetail (/task/:id) — full task page with:
    - Pipeline graph: role cards with icons, arrows, status colors
    - Click step → expand output (pre-formatted, JSON detected)
    - Action bar: Approve (with optional decision), Reject, Run Pipeline
    - Polling for live pipeline updates
  Dashboard: review_tasks badge ("awaiting review" in yellow)
  ProjectView: task rows are now clickable links to /task/:id

Runner: output_summary no longer truncated (full output for GUI).
Models: get_project_summary includes review_tasks count.

13 new API tests, 105 total, all passing. Frontend builds clean.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

web/frontend/src/api.ts

@@ -28,6 +28,7 @@ export interface Project {
   done_tasks: number
   active_tasks: number
   blocked_tasks: number
+  review_tasks: number
 }
 
 export interface ProjectDetail extends Project {
@@ -73,6 +74,24 @@ export interface Module {
   dependencies: string[] | null
 }
 
+export interface PipelineStep {
+  id: number
+  agent_role: string
+  action: string
+  output_summary: string | null
+  success: boolean | number
+  duration_seconds: number | null
+  tokens_used: number | null
+  model: string | null
+  cost_usd: number | null
+  created_at: string
+}
+
+export interface TaskFull extends Task {
+  pipeline_steps: PipelineStep[]
+  related_decisions: Decision[]
+}
+
 export interface CostEntry {
   project_id: string
   project_name: string
@@ -85,11 +104,20 @@ export interface CostEntry {
 export const api = {
   projects: () => get<Project[]>('/projects'),
   project: (id: string) => get<ProjectDetail>(`/projects/${id}`),
+  task: (id: string) => get<Task>(`/tasks/${id}`),
+  taskFull: (id: string) => get<TaskFull>(`/tasks/${id}/full`),
+  taskPipeline: (id: string) => get<PipelineStep[]>(`/tasks/${id}/pipeline`),
   cost: (days = 7) => get<CostEntry[]>(`/cost?days=${days}`),
   createProject: (data: { id: string; name: string; path: string; tech_stack?: string[]; priority?: number }) =>
     post<Project>('/projects', data),
   createTask: (data: { project_id: string; title: string; priority?: number; route_type?: string }) =>
     post<Task>('/tasks', data),
+  approveTask: (id: string, data?: { decision_title?: string; decision_description?: string; decision_type?: string }) =>
+    post<{ status: string }>(`/tasks/${id}/approve`, data || {}),
+  rejectTask: (id: string, reason: string) =>
+    post<{ status: string }>(`/tasks/${id}/reject`, { reason }),
+  runTask: (id: string) =>
+    post<{ status: string }>(`/tasks/${id}/run`, {}),
   bootstrap: (data: { path: string; id: string; name: string }) =>
     post<{ project: Project }>('/bootstrap', data),
 }