feat(ST-1138): mobile Solo-pagina + verify TaskDetailDialog (T-331/T-332/T-333)

- app/(mobile)/m/products/[id]/solo/page.tsx — hergebruikt SoloBoard 1:1 met
  desktop. 3-koloms-kanban blijft, NoActiveSprint-fallback ongewijzigd
- T-332 verify-only: TaskDetailDialog regel 383 gebruikt
  entityDialogContentClasses → mobile-fullscreen erft automatisch uit ST-1133
- Tests: regressie-vangnet op SoloBoard-hergebruik, requireSession,
  NoActiveSprint, en op TaskDetailDialog-className-wiring (geen override)

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

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

@@ -0,0 +1,120 @@
+// PBI-11 / ST-1138: Mobile Solo Paneel — wraps de bestaande SoloBoard zonder
+// content-aanpassingen. 3-koloms-kanban blijft (overflow-x scrollt zijwaarts).
+// TaskDetailDialog krijgt full-screen-mobile via gedeelde
+// entityDialogContentClasses (beslissing A in docs/plans/PBI-11-mobile-shell.md;
+// ingebouwd via ST-1133/T-317).
+
+import { notFound } from 'next/navigation'
+import { getAccessibleProduct } from '@/lib/product-access'
+import { prisma } from '@/lib/prisma'
+import { requireSession } from '@/lib/auth-guard'
+import { SoloBoard } from '@/components/solo/solo-board'
+import { NoActiveSprint } from '@/components/solo/no-active-sprint'
+import type { SoloTask } from '@/components/solo/solo-board'
+import type { UnassignedStory } from '@/components/solo/unassigned-stories-sheet'
+
+interface Props {
+  params: Promise<{ id: string }>
+}
+
+export default async function MobileSoloProductPage({ params }: Props) {
+  const { id } = await params
+  const session = await requireSession()
+
+  const product = await getAccessibleProduct(id, session.userId)
+  if (!product) notFound()
+
+  const sprint = await prisma.sprint.findFirst({
+    where: { product_id: id, status: 'ACTIVE' },
+  })
+
+  if (!sprint) {
+    return (
+      <div className="flex flex-col h-full">
+        <NoActiveSprint productId={id} productName={product.name} />
+      </div>
+    )
+  }
+
+  const [rawTasks, rawUnassigned] = await Promise.all([
+    prisma.task.findMany({
+      where: {
+        story: {
+          sprint_id: sprint.id,
+          assignee_id: session.userId,
+        },
+      },
+      include: {
+        story: {
+          select: {
+            id: true,
+            code: true,
+            title: true,
+            tasks: { select: { id: true }, orderBy: { sort_order: 'asc' } },
+          },
+        },
+      },
+      orderBy: [
+        { story: { pbi: { priority: 'asc' } } },
+        { story: { pbi: { sort_order: 'asc' } } },
+        { story: { sort_order: 'asc' } },
+        { priority: 'asc' },
+        { sort_order: 'asc' },
+      ],
+    }),
+    prisma.story.findMany({
+      where: { sprint_id: sprint.id, assignee_id: null },
+      select: {
+        id: true,
+        code: true,
+        title: true,
+        tasks: {
+          select: { id: true, title: true, description: true, priority: true, status: true },
+          orderBy: [{ priority: 'asc' }, { sort_order: 'asc' }],
+        },
+      },
+      orderBy: { sort_order: 'asc' },
+    }),
+  ])
+
+  const tasks: SoloTask[] = rawTasks.map(t => ({
+    id: t.id,
+    title: t.title,
+    description: t.description,
+    implementation_plan: t.implementation_plan,
+    priority: t.priority,
+    sort_order: t.sort_order,
+    status: t.status as SoloTask['status'],
+    verify_only: t.verify_only,
+    verify_required: t.verify_required as SoloTask['verify_required'],
+    story_id: t.story.id,
+    story_code: t.story.code,
+    story_title: t.story.title,
+    task_code: t.code,
+  }))
+
+  const unassignedStories: UnassignedStory[] = rawUnassigned.map(s => ({
+    id: s.id,
+    code: s.code,
+    title: s.title,
+    tasks: s.tasks.map(t => ({
+      id: t.id,
+      title: t.title,
+      description: t.description,
+      priority: t.priority,
+      status: t.status,
+    })),
+  }))
+
+  return (
+    <SoloBoard
+      productId={id}
+      sprintGoal={sprint.sprint_goal}
+      tasks={tasks}
+      unassignedStories={unassignedStories}
+      isDemo={session.isDemo ?? false}
+      currentUserId={session.userId}
+      repoUrl={product.repo_url}
+    />
+  )
+}