fix: replace revalidate with cache force-cache for SSG compatibility

src/shared/api/client.ts

@@ -1,9 +1,16 @@
 import type { ListResponse } from './types';
 
-/**
+/*
  * Native fetch wrapper for PocketBase API requests.
  */
-const PB_URL = process.env.NEXT_PUBLIC_PB_URL || 'http://127.0.0.1:8090';
+
+const PB_URL =
+  process.env.NEXT_PUBLIC_PB_URL ||
+  (process.env.NODE_ENV === 'production'
+    ? (() => {
+        throw new Error('NEXT_PUBLIC_PB_URL is not set');
+      })()
+    : 'http://127.0.0.1:8090');
 
 /**
  * Options for PocketBase collection fetching.
@@ -21,46 +28,42 @@ export type PBFetchOptions = {
    * Fields to expand (e.g., "stack")
    */
   expand?: string;
-  /**
-   * Cache revalidation time in seconds
-   * @default 3600
-   */
-  revalidate?: number;
 };
 
 /**
  * Fetch a list of records from a PocketBase collection.
  */
 export async function getCollection<T>(collection: string, options: PBFetchOptions = {}): Promise<ListResponse<T>> {
-  const { sort, filter, expand, revalidate = 3600 } = options;
+  const { sort, filter, expand } = options;
 
   const params = new URLSearchParams();
-  if (sort) params.set('sort', sort);
-  if (filter) params.set('filter', filter);
-  if (expand) params.set('expand', expand);
+  if (sort) {
+    params.set('sort', sort);
+  }
+  if (filter) {
+    params.set('filter', filter);
+  }
+  if (expand) {
+    params.set('expand', expand);
+  }
 
   const url = `${PB_URL}/api/collections/${collection}/records?${params.toString()}`;
 
-  const res = await fetch(url, {
-    next: { revalidate },
-  });
+  /* force-cache deduplicates identical fetches during the static build phase;
+   * it has no runtime effect in `output: 'export'` mode. */
+  const res = await fetch(url, { cache: 'force-cache' });
 
   if (!res.ok) {
-    throw new Error(`Failed to fetch collection: ${collection}`);
+    throw new Error(`PocketBase ${res.status} ${res.statusText} on collection "${collection}"`);
   }
 
   return res.json();
 }
 
 /**
- * Fetch a single record from a PocketBase collection by ID or filter.
+ * Fetch the first record matching an optional filter from a PocketBase collection.
  */
 export async function getFirstRecord<T>(collection: string, options: PBFetchOptions = {}): Promise<T | null> {
-  const data = await getCollection<T>(collection, {
-    ...options,
-    // PocketBase convention for "first" or "singleton" patterns
-    filter: options.filter,
-  });
-
-  return data.items[0] || null;
+  const data = await getCollection<T>(collection, options);
+  return data.items[0] ?? null;
 }