P9.2+P9.4: Task action buttons (open/start/finish/close/reopen) with finish-comment modal and close-reason modal

src/pages/TaskDetailPage.tsx

@@ -17,6 +17,12 @@ export default function TaskDetailPage() {
   const [comments, setComments] = useState<Comment[]>([])
   const [newComment, setNewComment] = useState('')
   const [showEditTask, setShowEditTask] = useState(false)
+  const [actionLoading, setActionLoading] = useState<string | null>(null)
+  const [actionError, setActionError] = useState<string | null>(null)
+  const [showFinishModal, setShowFinishModal] = useState(false)
+  const [finishComment, setFinishComment] = useState('')
+  const [showCloseModal, setShowCloseModal] = useState(false)
+  const [closeReason, setCloseReason] = useState('')
 
   const refreshTask = async () => {
     const { data } = await api.get<Task>(`/tasks/${id}`)
@@ -43,10 +49,42 @@ export default function TaskDetailPage() {
     setComments(data)
   }
 
-  const transition = async (newStatus: string) => {
+  const doAction = async (actionName: string, newStatus: string, extra?: () => Promise<void>) => {
+    setActionLoading(actionName)
+    setActionError(null)
+    try {
+      if (extra) await extra()
       await api.post(`/tasks/${id}/transition?new_status=${newStatus}`)
       await refreshTask()
+      // refresh comments too (finish adds one)
+      const { data } = await api.get<Comment[]>(`/tasks/${id}/comments`)
+      setComments(data)
+    } catch (err: any) {
+      setActionError(err?.response?.data?.detail || err?.message || 'Action failed')
+    } finally {
+      setActionLoading(null)
     }
+  }
+
+  const handleOpen = () => doAction('open', 'open')
+  const handleStart = () => doAction('start', 'undergoing')
+  const handleFinishConfirm = async () => {
+    if (!finishComment.trim()) return
+    await doAction('finish', 'completed', async () => {
+      await api.post('/comments', { content: finishComment, task_id: task!.id, author_id: user?.id || 1 })
+    })
+    setShowFinishModal(false)
+    setFinishComment('')
+  }
+  const handleCloseConfirm = async () => {
+    if (closeReason.trim()) {
+      await api.post('/comments', { content: `[Close reason] ${closeReason}`, task_id: task!.id, author_id: user?.id || 1 }).catch(() => {})
+    }
+    await doAction('close', 'closed')
+    setShowCloseModal(false)
+    setCloseReason('')
+  }
+  const handleReopen = () => doAction('reopen', 'open')
 
   const currentMemberRole = useMemo(
     () => members.find((m) => m.user_id === user?.id)?.role,
@@ -62,13 +100,8 @@ export default function TaskDetailPage() {
 
   if (!task) return <div className="loading">Loading...</div>
 
-  const statusActions: Record<string, string[]> = {
-    open: ['undergoing', 'closed'],
-    pending: ['open', 'closed'],
-    undergoing: ['completed', 'closed'],
-    completed: ['open'],
-    closed: ['open'],
-  }
+  // Determine which action buttons to show based on status (P9.2 / P11.8)
+  const isTerminal = task.status === 'completed' || task.status === 'closed'
 
   return (
     <div className="task-detail">
@@ -82,7 +115,9 @@ export default function TaskDetailPage() {
           <span className="badge">{task.task_type}</span>{task.task_subtype && <span className="badge">{task.task_subtype}</span>}
           {task.tags && <span className="tags">{task.tags}</span>}
         </div>
-        {canEditTask && <button className="btn-transition" style={{ marginTop: 8 }} onClick={() => setShowEditTask(true)}>Edit Task</button>}
+        {canEditTask && !isTerminal && task.status !== 'undergoing' && (
+          <button className="btn-transition" style={{ marginTop: 8 }} onClick={() => setShowEditTask(true)}>Edit Task</button>
+        )}
       </div>
 
       <CreateTaskModal
@@ -109,14 +144,107 @@ export default function TaskDetailPage() {
         </div>
 
         <div className="section">
-          <h3>Status changes</h3>
-          <div className="actions">
-            {(statusActions[task.status] || []).map((s) => (
-              <button key={s} className="btn-transition" onClick={() => transition(s)}>{s}</button>
-            ))}
+          <h3>Actions</h3>
+          {actionError && <div className="error-message" style={{ color: '#dc2626', marginBottom: 8 }}>{actionError}</div>}
+          <div className="actions" style={{ display: 'flex', gap: 8, flexWrap: 'wrap' }}>
+            {/* pending: Open + Close */}
+            {task.status === 'pending' && (
+              <>
+                <button className="btn-transition" disabled={!!actionLoading} onClick={handleOpen}>
+                  {actionLoading === 'open' ? 'Opening…' : '▶ Open'}
+                </button>
+                <button className="btn-transition" style={{ background: '#dc2626', color: '#fff' }} disabled={!!actionLoading} onClick={() => setShowCloseModal(true)}>
+                  {actionLoading === 'close' ? 'Closing…' : '✕ Close'}
+                </button>
+              </>
+            )}
+            {/* open: Start + Close */}
+            {task.status === 'open' && (
+              <>
+                <button className="btn-transition" style={{ background: '#f59e0b', color: '#fff' }} disabled={!!actionLoading} onClick={handleStart}>
+                  {actionLoading === 'start' ? 'Starting…' : '⏵ Start'}
+                </button>
+                <button className="btn-transition" style={{ background: '#dc2626', color: '#fff' }} disabled={!!actionLoading} onClick={() => setShowCloseModal(true)}>
+                  {actionLoading === 'close' ? 'Closing…' : '✕ Close'}
+                </button>
+              </>
+            )}
+            {/* undergoing: Finish + Close */}
+            {task.status === 'undergoing' && (
+              <>
+                <button className="btn-transition" style={{ background: '#16a34a', color: '#fff' }} disabled={!!actionLoading} onClick={() => setShowFinishModal(true)}>
+                  {actionLoading === 'finish' ? 'Finishing…' : '✓ Finish'}
+                </button>
+                <button className="btn-transition" style={{ background: '#dc2626', color: '#fff' }} disabled={!!actionLoading} onClick={() => setShowCloseModal(true)}>
+                  {actionLoading === 'close' ? 'Closing…' : '✕ Close'}
+                </button>
+              </>
+            )}
+            {/* completed / closed: Reopen */}
+            {(task.status === 'completed' || task.status === 'closed') && (
+              <button className="btn-transition" disabled={!!actionLoading} onClick={handleReopen}>
+                {actionLoading === 'reopen' ? 'Reopening…' : '↺ Reopen'}
+              </button>
+            )}
           </div>
         </div>
 
+        {/* Finish modal — requires comment (P9.4) */}
+        {showFinishModal && (
+          <div className="modal-overlay" style={{ position: 'fixed', inset: 0, background: 'rgba(0,0,0,0.4)', display: 'flex', alignItems: 'center', justifyContent: 'center', zIndex: 1000 }}>
+            <div className="modal-content" style={{ background: '#fff', borderRadius: 8, padding: 24, minWidth: 400, maxWidth: 520 }}>
+              <h3>Finish Task</h3>
+              <p style={{ fontSize: 14, color: '#666', marginBottom: 12 }}>Please leave a completion comment before finishing.</p>
+              <textarea
+                value={finishComment}
+                onChange={(e) => setFinishComment(e.target.value)}
+                placeholder="Describe what was done…"
+                rows={4}
+                style={{ width: '100%', marginBottom: 12 }}
+              />
+              <div style={{ display: 'flex', gap: 8, justifyContent: 'flex-end' }}>
+                <button className="btn-transition" onClick={() => { setShowFinishModal(false); setFinishComment('') }}>Cancel</button>
+                <button
+                  className="btn-transition"
+                  style={{ background: '#16a34a', color: '#fff' }}
+                  disabled={!finishComment.trim() || !!actionLoading}
+                  onClick={handleFinishConfirm}
+                >
+                  {actionLoading === 'finish' ? 'Finishing…' : 'Confirm Finish'}
+                </button>
+              </div>
+            </div>
+          </div>
+        )}
+
+        {/* Close modal — optional reason */}
+        {showCloseModal && (
+          <div className="modal-overlay" style={{ position: 'fixed', inset: 0, background: 'rgba(0,0,0,0.4)', display: 'flex', alignItems: 'center', justifyContent: 'center', zIndex: 1000 }}>
+            <div className="modal-content" style={{ background: '#fff', borderRadius: 8, padding: 24, minWidth: 400, maxWidth: 520 }}>
+              <h3>Close Task</h3>
+              <p style={{ fontSize: 14, color: '#666', marginBottom: 12 }}>This will cancel/abandon the task. Optionally provide a reason.</p>
+              <textarea
+                value={closeReason}
+                onChange={(e) => setCloseReason(e.target.value)}
+                placeholder="Reason for closing (optional)…"
+                rows={3}
+                style={{ width: '100%', marginBottom: 12 }}
+              />
+              <div style={{ display: 'flex', gap: 8, justifyContent: 'flex-end' }}>
+                <button className="btn-transition" onClick={() => { setShowCloseModal(false); setCloseReason('') }}>Cancel</button>
+                <button
+                  className="btn-transition"
+                  style={{ background: '#dc2626', color: '#fff' }}
+                  disabled={!!actionLoading}
+                  onClick={handleCloseConfirm}
+                >
+                  {actionLoading === 'close' ? 'Closing…' : 'Confirm Close'}
+                </button>
+              </div>
+            </div>
+          </div>
+        )}
+
         <div className="section">
           <h3>Comments ({comments.length})</h3>
           {comments.map((c) => (