feat(review): S5 pricing rules + deterministic title/short desc + server-derived ready + Review UI

- backend/pricing.py: /admin/pricing CRUD (one flat $/bdft per species leaf, SETTINGS-35).
- backend/review.py: POST /slabs/{id}/review -> deterministic title + short description
  (7 leaf patterns, length ft/in split, thickness 1/8-in precision, METADATA-80/85/90),
  price suggestion (bdft x species rate, REVIEW-25), server-derived ready + missing set
  (REVIEW-5).
- frontend: create/review/Review.svelte (slab id, primary category, price override,
  ready state + generated copy) + dev toggle.
- tests: 3 pricing + 4 review tests (title no-dims, ready set, price suggestion,
  knife-blank dims).

Verified: pytest 43 passed; gates exit 0; npm build ok.

frontend/src/App.svelte

@@ -12,6 +12,7 @@ import MeasurePanel from './capture/MeasurePanel.svelte';
 import Settings from './create/settings/Settings.svelte';
 import SlabList from './create/slabs/SlabList.svelte';
 import PhotoAttach from './create/photos/PhotoAttach.svelte';
+import Review from './create/review/Review.svelte';
 
   const gate = typeof window !== 'undefined' ? supported() : 'window unavailable';
   const session: CaptureSession = createCaptureSession();
@@ -22,6 +23,7 @@ import PhotoAttach from './create/photos/PhotoAttach.svelte';
   let showSettings = false;
   let showSlabs = false;
   let showPhotos = false;
+  let showReview = false;
 
   const unsubCap = session.capture.subscribe((c) => {
     cap = c;
@@ -98,6 +100,7 @@ import PhotoAttach from './create/photos/PhotoAttach.svelte';
       <button on:click={() => (showSettings = !showSettings)}>Settings (dev)</button>
       <button on:click={() => (showSlabs = !showSlabs)}>Slabs (dev)</button>
       <button on:click={() => (showPhotos = !showPhotos)}>Photos (dev)</button>
+      <button on:click={() => (showReview = !showReview)}>Review (dev)</button>
     </div>
     {#if showSettings}
       <Settings />
@@ -108,6 +111,9 @@ import PhotoAttach from './create/photos/PhotoAttach.svelte';
     {#if showPhotos}
       <PhotoAttach />
     {/if}
+    {#if showReview}
+      <Review />
+    {/if}
   </main>
 {/if}