Stundenplan Phase 3d: all 15 constraint editors via shared shell

Backend was already complete in Phase 2; this finishes the UI.

  - regeln/_shell.tsx introduces useConstraintCrud (handles list/create/
    delete state + reload), ConstraintShell (header, prereq banner,
    form toggle, error display, empty/loading/table render), and
    useShellStyles for the recurring theme tokens. Each editor now
    only carries its schema-specific bits.
  - Existing 4 editors (TeacherUnavailableDay/Window, SubjectMax
    Consecutive/PreferredPeriod) refactored onto the shell — every
    Playwright selector preserved.
  - 11 new editors covering the remaining constraint tables:
      TeacherMaxHours{Day,Week}, TeacherExcluded{Subject,Room},
      Subject{MinDayGap,ContiguousWhenRepeated,DoubleLesson},
      Class{MaxHoursDay,NoGaps},
      Room{RequiresType,Unavailable}.
  - RegelnHub now references all 15 editors directly — no more 'soon'
    placeholders. The two duplicate 'Max. Stunden / Tag' entries
    (teacher + class) are intentional and disambiguated by group.

Tests:
  - e2e/stundenplan.spec.ts: mock routes added for all 11 new constraint
    endpoints. RegelnHub suite gains a single test that switches
    through 13 uniquely-labelled editors, plus a dedicated test for
    the two duplicate 'Max. Stunden / Tag' labels.

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

studio-v2/app/stundenplan/_components/regeln/TeacherExclusionEditors.tsx

@@ -0,0 +1,164 @@
+'use client'
+
+import { useState, useEffect } from 'react'
+import {
+  teacherExcludedSubjectApi, teacherExcludedRoomApi,
+  teachersApi, subjectsApi, roomsApi,
+} from '@/lib/stundenplan/api'
+import type {
+  TeacherExcludedSubject, TeacherExcludedRoom,
+  TimetableTeacher, TimetableSubject, TimetableRoom,
+} from '@/app/stundenplan/types'
+import { useConstraintCrud, ConstraintShell, useShellStyles } from './_shell'
+
+// ---------- Excluded Subject ----------
+
+type SubForm = Omit<TeacherExcludedSubject, 'id' | 'created_by_user_id' | 'created_at'>
+const initialSub: SubForm = { teacher_id: '', subject_id: '', is_hard: true, weight: 100, active: true, note: '' }
+
+export function TeacherExcludedSubjectEditor() {
+  const styles = useShellStyles()
+  const [teachers, setTeachers] = useState<TimetableTeacher[]>([])
+  const [subjects, setSubjects] = useState<TimetableSubject[]>([])
+  const crud = useConstraintCrud<TeacherExcludedSubject, SubForm>(teacherExcludedSubjectApi, initialSub)
+
+  useEffect(() => {
+    teachersApi.list().then(setTeachers).catch(() => setTeachers([]))
+    subjectsApi.list().then(setSubjects).catch(() => setSubjects([]))
+  }, [])
+
+  const tLabel = (id: string): string => {
+    const t = teachers.find(x => x.id === id); return t ? `${t.last_name}, ${t.first_name}` : id.slice(0, 8) + '…'
+  }
+  const sLabel = (id: string): string => {
+    const s = subjects.find(x => x.id === id); return s ? s.name : id.slice(0, 8) + '…'
+  }
+  const missing = teachers.length === 0 || subjects.length === 0
+
+  return (
+    <ConstraintShell
+      testId="teacher-excluded-subject-editor"
+      title="Lehrer: Fach ausgeschlossen"
+      description="Beispiel: „Anna darf kein Sport unterrichten" (oft Pflicht, z.B. Qualifikation/Behinderung)."
+      newLabel="+ Neue Regel"
+      newDisabled={missing}
+      prereqWarning={missing ? 'Zuerst Lehrer und Faecher anlegen.' : null}
+      emptyText="Keine Regeln vorhanden."
+      tableHeaders={['Lehrer', 'Fach', 'Hart', 'Weight']}
+      state={crud}
+      formBody={
+        <div className="grid grid-cols-1 md:grid-cols-4 gap-3">
+          <div>
+            <label className="block text-sm mb-1 opacity-70">Lehrer</label>
+            <select required value={crud.form.teacher_id} onChange={e => crud.setForm({ ...crud.form, teacher_id: e.target.value })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`}>
+              <option value="">— bitte waehlen —</option>
+              {teachers.map(t => <option key={t.id} value={t.id}>{t.last_name}, {t.first_name}</option>)}
+            </select>
+          </div>
+          <div>
+            <label className="block text-sm mb-1 opacity-70">Fach</label>
+            <select required value={crud.form.subject_id} onChange={e => crud.setForm({ ...crud.form, subject_id: e.target.value })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`}>
+              <option value="">— bitte waehlen —</option>
+              {subjects.map(s => <option key={s.id} value={s.id}>{s.name}</option>)}
+            </select>
+          </div>
+          <div className="flex items-center gap-2">
+            <input type="checkbox" id="is_hard_tes" checked={crud.form.is_hard} onChange={e => crud.setForm({ ...crud.form, is_hard: e.target.checked })} className="w-5 h-5" />
+            <label htmlFor="is_hard_tes" className="text-sm">Harte Regel</label>
+          </div>
+          <div className="flex items-end">
+            <button type="submit" disabled={crud.submitting} className={styles.submitBtn}>{crud.submitting ? 'Speichert...' : 'Anlegen'}</button>
+          </div>
+        </div>
+      }
+      renderRow={(item) => {
+        const c = item as TeacherExcludedSubject
+        return (
+          <tr key={c.id} className={styles.rowClass}>
+            <td className="px-4 py-3 font-medium">{tLabel(c.teacher_id)}</td>
+            <td className="px-4 py-3">{sLabel(c.subject_id)}</td>
+            <td className="px-4 py-3">{c.is_hard ? '✓' : '—'}</td>
+            <td className="px-4 py-3">{c.weight}</td>
+            <td className="px-4 py-3 text-right"><button onClick={() => crud.remove(c.id)} className={styles.deleteBtn}>Loeschen</button></td>
+          </tr>
+        )
+      }}
+    />
+  )
+}
+
+// ---------- Excluded Room ----------
+
+type RoomForm = Omit<TeacherExcludedRoom, 'id' | 'created_by_user_id' | 'created_at'>
+const initialRoom: RoomForm = { teacher_id: '', room_id: '', is_hard: true, weight: 100, active: true, note: '' }
+
+export function TeacherExcludedRoomEditor() {
+  const styles = useShellStyles()
+  const [teachers, setTeachers] = useState<TimetableTeacher[]>([])
+  const [rooms, setRooms] = useState<TimetableRoom[]>([])
+  const crud = useConstraintCrud<TeacherExcludedRoom, RoomForm>(teacherExcludedRoomApi, initialRoom)
+
+  useEffect(() => {
+    teachersApi.list().then(setTeachers).catch(() => setTeachers([]))
+    roomsApi.list().then(setRooms).catch(() => setRooms([]))
+  }, [])
+
+  const tLabel = (id: string): string => {
+    const t = teachers.find(x => x.id === id); return t ? `${t.last_name}, ${t.first_name}` : id.slice(0, 8) + '…'
+  }
+  const rLabel = (id: string): string => {
+    const r = rooms.find(x => x.id === id); return r ? r.name : id.slice(0, 8) + '…'
+  }
+  const missing = teachers.length === 0 || rooms.length === 0
+
+  return (
+    <ConstraintShell
+      testId="teacher-excluded-room-editor"
+      title="Lehrer: Raum ausgeschlossen"
+      description="Beispiel: „Anna im Rollstuhl, Raum F kein Fahrstuhl"."
+      newLabel="+ Neue Regel"
+      newDisabled={missing}
+      prereqWarning={missing ? 'Zuerst Lehrer und Raeume anlegen.' : null}
+      emptyText="Keine Regeln vorhanden."
+      tableHeaders={['Lehrer', 'Raum', 'Hart', 'Weight']}
+      state={crud}
+      formBody={
+        <div className="grid grid-cols-1 md:grid-cols-4 gap-3">
+          <div>
+            <label className="block text-sm mb-1 opacity-70">Lehrer</label>
+            <select required value={crud.form.teacher_id} onChange={e => crud.setForm({ ...crud.form, teacher_id: e.target.value })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`}>
+              <option value="">— bitte waehlen —</option>
+              {teachers.map(t => <option key={t.id} value={t.id}>{t.last_name}, {t.first_name}</option>)}
+            </select>
+          </div>
+          <div>
+            <label className="block text-sm mb-1 opacity-70">Raum</label>
+            <select required value={crud.form.room_id} onChange={e => crud.setForm({ ...crud.form, room_id: e.target.value })} className={`w-full px-3 py-2 rounded-lg border ${styles.inputClass}`}>
+              <option value="">— bitte waehlen —</option>
+              {rooms.map(r => <option key={r.id} value={r.id}>{r.name}</option>)}
+            </select>
+          </div>
+          <div className="flex items-center gap-2">
+            <input type="checkbox" id="is_hard_ter" checked={crud.form.is_hard} onChange={e => crud.setForm({ ...crud.form, is_hard: e.target.checked })} className="w-5 h-5" />
+            <label htmlFor="is_hard_ter" className="text-sm">Harte Regel</label>
+          </div>
+          <div className="flex items-end">
+            <button type="submit" disabled={crud.submitting} className={styles.submitBtn}>{crud.submitting ? 'Speichert...' : 'Anlegen'}</button>
+          </div>
+        </div>
+      }
+      renderRow={(item) => {
+        const c = item as TeacherExcludedRoom
+        return (
+          <tr key={c.id} className={styles.rowClass}>
+            <td className="px-4 py-3 font-medium">{tLabel(c.teacher_id)}</td>
+            <td className="px-4 py-3">{rLabel(c.room_id)}</td>
+            <td className="px-4 py-3">{c.is_hard ? '✓' : '—'}</td>
+            <td className="px-4 py-3">{c.weight}</td>
+            <td className="px-4 py-3 text-right"><button onClick={() => crud.remove(c.id)} className={styles.deleteBtn}>Loeschen</button></td>
+          </tr>
+        )
+      }}
+    />
+  )
+}