feat: 'Start agents (n)'-knop in Solo header, productname weg

SoloBoard-header toont nu een primary button die het aantal queueable
TO_DO-taken telt (TO_DO zonder actieve ClaudeJob via
claudeJobsByTaskId-store) en bij klik de nieuwe
enqueueAllTodoJobsAction aanroept. Toast geeft het aantal gestarte
agents terug.

- productname-h1 verwijderd (staat al in NavBar-dropdown, dubbel)
- sprintdoel blijft naast de knop
- 'Toon openstaande stories'-link blijft rechts
- demo-modus disabled met DemoTooltip
- batch-pending state voorkomt dubbele klikken
- productName-prop weg uit SoloBoard + page.tsx (was alleen voor h1)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

app/(app)/products/[id]/solo/page.tsx

@@ -105,7 +105,6 @@ export default async function SoloProductPage({ params }: Props) {
   return (
     <SoloBoard
       productId={id}
-      productName={product.name}
       sprintGoal={sprint.sprint_goal}
       tasks={tasks}
       unassignedStories={unassignedStories}

components/solo/solo-board.tsx

@@ -8,6 +8,9 @@ import {
 import { toast } from 'sonner'
 import { useSoloStore } from '@/stores/solo-store'
 import { taskStatusToApi } from '@/lib/task-status'
+import { enqueueAllTodoJobsAction } from '@/actions/claude-jobs'
+import { Button } from '@/components/ui/button'
+import { DemoTooltip } from '@/components/shared/demo-tooltip'
 import { SplitPane } from '@/components/split-pane/split-pane'
 import { SoloColumn, type ColumnStatus } from './solo-column'
 import { SoloTaskCardOverlay } from './solo-task-card'
@@ -30,7 +33,6 @@ export interface SoloTask {
 
 export interface SoloBoardProps {
   productId: string
-  productName: string
   sprintGoal: string
   tasks: SoloTask[]
   unassignedStories: UnassignedStory[]
@@ -46,14 +48,16 @@ function getColumnStatus(status: SoloTask['status']): ColumnStatus {
 }
 
 export function SoloBoard({
-  productId, productName, sprintGoal, tasks: initialTasks, unassignedStories: initialUnassigned, isDemo,
+  productId, sprintGoal, tasks: initialTasks, unassignedStories: initialUnassigned, isDemo,
 }: SoloBoardProps) {
   const { tasks, initTasks, optimisticMove, rollback, markPending, clearPending } = useSoloStore()
+  const claudeJobsByTaskId = useSoloStore((s) => s.claudeJobsByTaskId)
   const [activeDragId, setActiveDragId] = useState<string | null>(null)
   const [selectedTask, setSelectedTask] = useState<SoloTask | null>(null)
   const [sheetOpen, setSheetOpen] = useState(false)
   const [unassignedStories, setUnassignedStories] = useState(initialUnassigned)
   const [, startTransition] = useTransition()
+  const [batchPending, startBatchTransition] = useTransition()
 
   const taskKey = initialTasks.map(t => t.id).join(',')
   useEffect(() => {
@@ -125,13 +129,40 @@ export function SoloBoard({
 
   const activeTask = activeDragId ? tasks[activeDragId] : null
 
+  const queueableCount = columnTasks.TO_DO.filter(t => {
+    const job = claudeJobsByTaskId[t.id]
+    return !job || (job.status !== 'queued' && job.status !== 'claimed' && job.status !== 'running')
+  }).length
+
+  function handleStartAll() {
+    if (queueableCount === 0) return
+    startBatchTransition(async () => {
+      const result = await enqueueAllTodoJobsAction(productId)
+      if ('error' in result) {
+        toast.error(result.error)
+      } else if (result.count === 0) {
+        toast.info('Geen taken om te starten')
+      } else {
+        toast.success(`${result.count} ${result.count === 1 ? 'agent' : 'agents'} ingeschakeld`)
+      }
+    })
+  }
+
   return (
     <div className="flex flex-col h-full p-4 gap-4 min-h-0">
       <div className="flex items-start justify-between gap-4 shrink-0">
-        <div className="min-w-0">
-          <h1 className="text-base font-semibold text-foreground truncate">{productName}</h1>
+        <div className="min-w-0 flex items-center gap-3">
+          <DemoTooltip show={isDemo}>
+            <Button
+              size="sm"
+              onClick={handleStartAll}
+              disabled={isDemo || batchPending || queueableCount === 0}
+            >
+              {batchPending ? 'Starten…' : `Start agents (${queueableCount})`}
+            </Button>
+          </DemoTooltip>
           {sprintGoal && (
-            <p className="text-sm text-muted-foreground mt-0.5 line-clamp-2">{sprintGoal}</p>
+            <p className="text-sm text-muted-foreground line-clamp-2 min-w-0">{sprintGoal}</p>
           )}
         </div>
         <button