fix: audit fixes — tier-quota bypass, webhook SSRF, auth hardening, pagination, a11y

Full audit (bugs/UI-UX/backend/feature-gap) turned up a money-leak AI quota
bypass, webhook SSRF, and a long tail of missing pagination/auth/a11y work.
Fixes land together since HANDOFF.md tracked them as one backlog.

- AI routes charge tier quota before generating; nutrition POST is author-only
- Webhook dispatch re-validates URL per delivery (SSRF/DNS-rebinding), treats
  redirects as failures; recipe.published now actually dispatches
- New indexes/unique constraints on recipes, meal-planning, comments FK cascade
- Recipe PUT/restore snapshot only inside the transaction, after validation
- Recipe DELETE cleans up S3 objects (recipe + review photos)
- Optimistic UI (favorite/star/follow/shopping-list) rolls back on failure
- Upload presign enforces file size cap + per-tier storage quota
- Route-level loading/error/not-found states across (app), admin, and root
- middleware.ts guards (app)/admin; requireAdmin checks DB role, not cached
  session; rate limiting applied to both session and API-key branches,
  bucketed per key; Stripe webhook dedupes by event id
- Pagination added to recipes, feed, profile, comments, pantry, admin tables
- Nav shows real avatar + profile link + dark-mode toggle; destructive actions
  standardized on AlertDialog
- Unsaved-changes guard + real ingredient/step validation on recipe form;
  canonical /recipes/[id] used in-app; next/image migration; aria-labels and
  alt text across icon buttons, avatars, recipe photos
- packages/api-types removed (zero callers, too drifted to safely rewire);
  openapi.ts and ai-keys error shape drift fixed; BYOK decrypt failures now
  surface instead of silently falling back to the platform key

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/web/components/recipe/add-to-shopping-list-button.tsx

@@ -121,7 +121,7 @@ export function AddToShoppingListButton({
       <TooltipProvider>
         <Tooltip>
           <TooltipTrigger render={
-            <Button variant="ghost" size="icon" onClick={() => setOpen(true)}>
+            <Button variant="ghost" size="icon" onClick={() => setOpen(true)} aria-label={tShopping("addToList")}>
               <ShoppingCart className="h-4 w-4" />
             </Button>
           } />
@@ -153,11 +153,13 @@ export function AddToShoppingListButton({
                   type="button" variant="ghost" size="icon" className="h-7 w-7"
                   onClick={() => setServings((s) => Math.max(1, s - 1))}
                   disabled={servings <= 1}
+                  aria-label={tCommon("decrease")}
                 >−</Button>
                 <span className="w-8 text-center font-medium">{servings}</span>
                 <Button
                   type="button" variant="ghost" size="icon" className="h-7 w-7"
                   onClick={() => setServings((s) => s + 1)}
+                  aria-label={tCommon("increase")}
                 >+</Button>
               </div>
               {scale !== 1 && (