feat(voice): adapt voice entry to the stacked-jobs prosthesis model

Authored by the /orchestrate builder agent, committed unrepaired so the
fixes that follow are reviewable against it.

Backend: replaces the flat prosthesisDefaultType/prosthesisOverrides wire
shape with a prosthesis: ProsthesisAssignment[] list whose targets can be a
tooth or a jaw; adds resolveAssignmentTarget / classifyTypeCode /
resolveProsthesisAssignment for leaf-vs-category classification, region
validity with mixed-region deferral, and assignmentIndex on unresolved
items; adds PROSTHESIS_CATEGORY and PROSTHESIS_SUBCATEGORY to
CatalogEntityKind with a migration and seeded fa/en/nl translations; and
rewrites the extraction prompt to render the catalog as a tree.

Frontend: merged "teeth and prosthesis" row, stack preview through the
existing applyLeafToJobs, three chip-fold paths, rewritten applyVoiceResult
and voiceForEditor, and the two carried-forward recording fixes — the
container fallback that refused Safari and the render gate that never
checked isMediaRecorderSupported().

Adds Vitest for the frontend's pure helpers, and updates CLAUDE.md.

Gate was green: backend 16 suites / 209 tests, nest build, prisma validate;
frontend 37 Vitest tests, tsc --noEmit, next build.

KNOWN DEFECTS, fixed in the commits that follow:
- VoiceReviewSheet.tsx:169 — a picked tooth chip is dropped on Apply
- VoiceReviewSheet.tsx:213 / TreatmentWorkspace.tsx:2215 — decision 41's
  type-row lock is missing, so unticking it saves prosthesis lab rows on a
  non-prosthesis detail

Reviewed on the correctness lens only; regression-risk never ran. The
migration was validated but never applied.

Spec: docs/specs/voice-treatment-entry/spec.md
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

frontend/messages/fa.json

@@ -927,20 +927,25 @@
     "voiceProcessing": "در حال پردازش گفتار…",
     "voiceReviewTitle": "بررسی آنچه دریافت شد",
     "voiceNothingExtracted": "از این ضبط چیز قابل استفاده‌ای برداشت نشد.",
-    "voiceProsthesisIncomplete": "برای {teeth} نوع پروتز مشخص نشده — تا زمانی که همه دندان‌ها نوع داشته باشند، کیس ارسال نمی‌شود.",
     "voiceLabInexact": "نام گفته‌شده فقط تا حدی با این لابراتوار مطابقت داشت. پیش از ارسال تأیید کنید.",
     "voiceNotUnderstood": "شناسایی نشد",
     "voicePickTooth": "کدام دندان؟",
+    "voicePickJaw": "کدام فک؟",
+    "voiceTeethAndProsthesis": "دندان‌ها و پروتز",
+    "voiceNoProsthesisHeard": "پروتزی شنیده نشد",
+    "voiceStackRefused": "افزوده نشد — قابل ترکیب نیست",
     "voiceDiscard": "انصراف",
     "voiceApply": "{count, plural, one {اعمال # مورد} other {اعمال # مورد}}",
     "voiceUnresolved": {
       "not_permanent_tooth": "دندان دائمی نیست",
       "position_out_of_range": "شماره دندان معتبر نیست",
       "tooth_missing_quadrant": "شماره کامل دندان نیست — مثلاً «بیست و شش»",
+      "prosthesis_type_ambiguous": "یک عنوان کلی است، نه یک متریال مشخص — یکی را از پایین انتخاب کنید",
+      "arch_not_spoken": "برای کدام فک بود؟ — از پایین انتخاب کنید",
+      "code_not_valid_for_target": "با این دندان یا فک همخوانی ندارد",
       "malformed": "قابل خواندن نبود",
       "span_not_same_arch": "بریج نمی‌تواند بین دو فک باشد",
       "unknown_catalog_code": "در فهرست این مطب نیست",
-      "tooth_not_selected": "این دندان بخشی از این مورد نیست",
       "invalid_date": "تاریخ قابل استفاده نیست"
     },
     "voiceFailed": "ثبت گفتاری انجام نشد. لطفاً دوباره تلاش کنید."