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>

packages/db/src/migrations/0023_medical_dark_beast.sql

@@ -0,0 +1,8 @@
+ALTER TABLE "comments" ADD CONSTRAINT "comments_parent_id_comments_id_fk" FOREIGN KEY ("parent_id") REFERENCES "public"."comments"("id") ON DELETE cascade ON UPDATE no action;--> statement-breakpoint
+CREATE INDEX "recipe_ingredients_recipe_idx" ON "recipe_ingredients" USING btree ("recipe_id");--> statement-breakpoint
+CREATE INDEX "recipe_steps_recipe_idx" ON "recipe_steps" USING btree ("recipe_id");--> statement-breakpoint
+CREATE INDEX "meal_plan_entries_plan_idx" ON "meal_plan_entries" USING btree ("meal_plan_id");--> statement-breakpoint
+CREATE UNIQUE INDEX "meal_plan_entries_plan_day_meal_idx" ON "meal_plan_entries" USING btree ("meal_plan_id","day","meal_type");--> statement-breakpoint
+CREATE INDEX "meal_plans_user_idx" ON "meal_plans" USING btree ("user_id");--> statement-breakpoint
+CREATE UNIQUE INDEX "meal_plans_user_week_idx" ON "meal_plans" USING btree ("user_id","week_start");--> statement-breakpoint
+CREATE INDEX "pantry_items_user_idx" ON "pantry_items" USING btree ("user_id");

packages/db/src/migrations/0024_moaning_roughhouse.sql

@@ -0,0 +1,5 @@
+CREATE TABLE "processed_stripe_events" (
+	"id" text PRIMARY KEY NOT NULL,
+	"type" text NOT NULL,
+	"created_at" timestamp DEFAULT now() NOT NULL
+);

packages/db/src/migrations/meta/_journal.json

@@ -162,6 +162,20 @@
       "when": 1783603737477,
       "tag": "0022_foamy_loki",
       "breakpoints": true
+    },
+    {
+      "idx": 23,
+      "version": "7",
+      "when": 1783615141150,
+      "tag": "0023_medical_dark_beast",
+      "breakpoints": true
+    },
+    {
+      "idx": 24,
+      "version": "7",
+      "when": 1783623700772,
+      "tag": "0024_moaning_roughhouse",
+      "breakpoints": true
     }
   ]
 }