feat(tickets): Rückfrage am Ticket + Antwort durch die Züchterin

Tickets können jetzt eine Rückfrage (Question) tragen und die Züchterin kann
in-app antworten. Feedback um FK-freie Felder Question/Answer/AnsweredAt erweitert
(überlebt Ingest-Wipe); Status-Lebenszyklus Open → NeedsInfo (Rückfrage gestellt)
→ Answered (beantwortet) → Resolved. Migration AddFeedbackQuestionAnswer.

PUT /feedback/{id}: question → NeedsInfo, answer → Answered+AnsweredAt; DTO gibt
die Felder zurück. Tickets-Seite (/hilfe/tickets) zeigt die Rückfrage hervorgehoben
und bietet ein Antwort-Feld + „Antworten"; Status-Badges Offen/Rückfrage offen/
Beantwortet/Gelöst.

Tests: FeedbackEndpointTests (Frage→NeedsInfo, Antwort→Answered, übersteht Ingest),
e2e tickets.spec.ts. dotnet/vitest/playwright grün.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

gerbil-manager-web/e2e/mock-api.ts

@@ -409,6 +409,9 @@ export async function installMockApi(page: Page): Promise<MockDb> {
           createdAt: new Date().toISOString(),
           status: 'Open',
           resolvedAt: null,
+          question: null,
+          answer: null,
+          answeredAt: null,
         }
         db.feedback.push(created)
         return json(route, 201, created)
@@ -425,15 +428,47 @@ export async function installMockApi(page: Page): Promise<MockDb> {
       const idx = db.feedback.findIndex((f) => f.id === fid)
       if (idx < 0) return json(route, 404, { title: 'Not Found' })
       if (method === 'PUT') {
-        const body = request.postDataJSON() as { message?: string; status?: string }
+        const body = request.postDataJSON() as {
+          message?: string
+          status?: string
+          question?: string
+          answer?: string
+        }
         const row = db.feedback[idx]
         if (typeof body.message === 'string') {
           if (!body.message.trim()) return json(route, 400, 'Message darf nicht leer sein.')
           row.message = body.message.trim()
         }
+        // Rückfrage anhängen → NeedsInfo (außer bereits Resolved).
+        if (typeof body.question === 'string') {
+          const q = body.question.trim()
+          row.question = q.length === 0 ? null : q
+          if (row.question && row.status !== 'Resolved') {
+            row.status = 'NeedsInfo'
+            row.resolvedAt = null
+          }
+        }
+        // Antwort der Züchterin → Answered + answeredAt.
+        if (typeof body.answer === 'string') {
+          const a = body.answer.trim()
+          if (a.length === 0) {
+            row.answer = null
+            row.answeredAt = null
+          } else {
+            row.answer = a
+            row.answeredAt = new Date().toISOString()
+            row.status = 'Answered'
+            row.resolvedAt = null
+          }
+        }
         if (typeof body.status === 'string') {
-          const resolved = body.status.toLowerCase() === 'resolved'
-          row.status = resolved ? 'Resolved' : 'Open'
+          const s = body.status
+          const resolved = s.toLowerCase() === 'resolved'
+          row.status = resolved
+            ? 'Resolved'
+            : s === 'NeedsInfo' || s === 'Answered'
+              ? s
+              : 'Open'
           row.resolvedAt = resolved ? (row.resolvedAt ?? new Date().toISOString()) : null
         }
         return json(route, 200, row)