feat: merge Explore and Activity Feed, unify recipe cards

Explore and Feed covered overlapping ground (recommendations, following,
trending) in two separate places with three different card designs.
Explore now hosts Discover/Following/For You tabs, and every recipe
card everywhere on the page matches the Recipes page's cover-photo
card instead of the old text-only search result.

v0.36.0

apps/web/lib/openapi.ts

@@ -320,8 +320,11 @@ export function generateOpenApiSpec(): object {
     id: z.string(), title: z.string(), description: z.string().nullable(),
     baseServings: z.number().int(), prepMins: z.number().int().nullable(), cookMins: z.number().int().nullable(),
     difficulty: z.enum(["easy", "medium", "hard"]).nullable(), visibility: z.enum(["private", "unlisted", "public"]),
+    tags: z.array(z.string()), isBatchCook: z.boolean(), sourceUrl: z.string().nullable(), recipeType: z.enum(["dish", "drink"]),
     createdAt: z.string().datetime(), updatedAt: z.string().datetime(), authorId: z.string(),
     authorName: z.string(), authorUsername: z.string().nullable(), authorAvatarUrl: z.string().nullable(),
+    photos: z.array(z.object({ storageKey: z.string(), isCover: z.boolean() })),
+    dishCount: z.number().int(), isFavorited: z.boolean(),
   }));
   registry.registerPath({ method: "get", path: "/api/v1/feed", summary: "Activity feed (pull-based) — recent recipes from users you follow", security, request: { query: z.object({ limit: z.coerce.number().int().min(1).max(50).default(20), offset: z.coerce.number().int().min(0).default(0) }) }, responses: { 200: { description: "Paginated", content: { "application/json": { schema: z.object({ data: z.array(FeedRecipeRef), total: z.number(), limit: z.number(), offset: z.number(), message: z.string().optional() }) } } }, 401: { description: "Unauthorized", content: { "application/json": { schema: ApiErrorRef } } } } });
   registry.registerPath({ method: "get", path: "/api/v1/collections", summary: "List collections", security, request: { query: LimitOffset }, responses: { 200: { description: "Paginated collections", content: { "application/json": { schema: PaginatedCollections } } }, 401: { description: "Unauthorized", content: { "application/json": { schema: ApiErrorRef } } } } });
@@ -605,6 +608,9 @@ export function generateOpenApiSpec(): object {
     difficulty: z.enum(["easy", "medium", "hard"]).nullable(), visibility: z.enum(["private", "unlisted", "public"]),
     aiGenerated: z.boolean(), createdAt: z.string().datetime(), authorId: z.string(),
     authorName: z.string(), authorUsername: z.string().nullable(), authorAvatarUrl: z.string().nullable(),
+    tags: z.array(z.string()), isBatchCook: z.boolean(), sourceUrl: z.string().nullable(), recipeType: z.enum(["dish", "drink"]),
+    photos: z.array(z.object({ storageKey: z.string(), isCover: z.boolean() })),
+    dishCount: z.number().int(), isFavorited: z.boolean(),
   }));
 
   registry.registerPath({ method: "get", path: "/api/v1/feed/trending", summary: "Trending public recipes (by favorites in the last 7 days)", description: "Public — no auth required. Excludes private authors.", security: [], request: { query: z.object({ limit: z.coerce.number().int().min(1).max(50).default(20), offset: z.coerce.number().int().min(0).default(0) }) }, responses: { 200: { description: "Paginated", content: { "application/json": { schema: z.object({ data: z.array(TrendingRecipeRef), total: z.number(), limit: z.number(), offset: z.number() }) } } } } });
@@ -614,8 +620,12 @@ export function generateOpenApiSpec(): object {
   const SearchResultRef = registry.register("SearchResult", z.object({
     id: z.string(), title: z.string(), description: z.string().nullable(), difficulty: z.enum(["easy", "medium", "hard"]).nullable(),
     baseServings: z.number().int(), prepMins: z.number().int().nullable(), cookMins: z.number().int().nullable(),
+    visibility: z.enum(["private", "unlisted", "public"]), tags: z.array(z.string()), isBatchCook: z.boolean(),
+    sourceUrl: z.string().nullable(), recipeType: z.enum(["dish", "drink"]),
     authorId: z.string(), authorName: z.string(), createdAt: z.string().datetime(),
     avgRating: z.number().nullable(), ratingCount: z.number().int(),
+    photos: z.array(z.object({ storageKey: z.string(), isCover: z.boolean() })),
+    dishCount: z.number().int(), isFavorited: z.boolean(),
   }));
 
   registry.registerPath({ method: "get", path: "/api/v1/search", summary: "Full-text search across public recipes — title, description, ingredient names, and tags", description: "Public — no auth required. Matches only public recipes by non-private authors.", security: [], request: { query: z.object({ q: z.string().min(1).max(200), difficulty: z.enum(["easy", "medium", "hard"]).optional(), recipeType: z.enum(["dish", "drink"]).optional(), maxMins: z.coerce.number().optional().describe("Max prepMins + cookMins combined"), dietary: z.string().optional().describe("Comma-separated: vegan,vegetarian,glutenFree,dairyFree"), tags: z.string().optional().describe("Comma-separated exact-tag filter chips, up to 5"), limit: z.coerce.number().min(1).max(50).default(20), offset: z.coerce.number().min(0).default(0) }) }, responses: { 200: { description: "Paginated results", content: { "application/json": { schema: z.object({ data: z.array(SearchResultRef), total: z.number(), limit: z.number(), offset: z.number() }) } } }, 400: { description: "Missing or empty 'q'", content: { "application/json": { schema: ApiErrorRef } } } } });