fix: trend discovery cache + auth JSON parsing + GitHub stars regex

1. Add cache: 'no-store' to fetchWithTimeout — Next.js extends fetch()
   with aggressive caching that was causing all sources to return 0 results
2. Handle double-encoded JSON in NOTEBOOKLM_AUTH_JSON — .env.local wraps
   values in quotes, producing a JSON string literal that needs double-parse
3. Fix GitHub stars regex to match "this week" and "this month" (not just "today")
4. Add verbose logging for Dev.to tag failures and empty blog feed parsing
5. Increase fetch timeout from 10s to 15s

Co-authored-by: research <research@miriad.systems>

Author: Miriad

lib/services/notebooklm/auth.ts

@@ -60,11 +60,18 @@ function parseCookiesFromEnv(): Record<string, string> {
 
   let storageState: { cookies?: NotebookLMCookie[] };
   try {
-    storageState = JSON.parse(authJson) as { cookies?: NotebookLMCookie[] };
+    // .env.local may double-quote the value, producing a JSON string literal.
+    // Try parsing once; if the result is a string, parse again.
+    let parsed: unknown = JSON.parse(authJson);
+    if (typeof parsed === 'string') {
+      parsed = JSON.parse(parsed);
+    }
+    storageState = parsed as { cookies?: NotebookLMCookie[] };
   } catch {
     throw new Error(
       '[NotebookLM] NOTEBOOKLM_AUTH_JSON is not valid JSON. ' +
-        'Expected Playwright storage state format: {"cookies": [...]}'
+        'Expected Playwright storage state format: {"cookies": [...]}. ' +
+        'Tip: In .env.local, set it without wrapping quotes: NOTEBOOKLM_AUTH_JSON={"cookies":[...]}'
     );
   }
 

lib/services/trend-discovery.ts

@@ -287,9 +287,14 @@ async function fetchWithTimeout(
   init?: RequestInit,
 ): Promise<Response> {
   const controller = new AbortController();
-  const timeout = setTimeout(() => controller.abort(), 10_000);
+  const timeout = setTimeout(() => controller.abort(), 15_000);
   try {
-    return await fetch(url, { ...init, signal: controller.signal });
+    return await fetch(url, {
+      ...init,
+      signal: controller.signal,
+      // Next.js extends fetch() with aggressive caching — disable it
+      cache: 'no-store' as RequestCache,
+    });
   } finally {
     clearTimeout(timeout);
   }
@@ -550,7 +555,10 @@ async function fetchDevto(lookbackDays: number): Promise<TrendSignal[]> {
         const res = await fetchWithTimeout(
           `https://dev.to/api/articles?tag=${tag}&top=${lookbackDays}`,
         );
-        if (!res.ok) return [];
+        if (!res.ok) {
+          console.warn(`${LOG_PREFIX} Dev.to tag ${tag} failed: ${res.status}`);
+          return [];
+        }
         return (await res.json()) as DevtoArticle[];
       }),
     );
@@ -613,6 +621,9 @@ async function fetchBlogFeeds(lookbackDays: number): Promise<TrendSignal[]> {
         }
         const xml = await res.text();
         const items = parseFeedItems(xml);
+        if (items.length === 0) {
+          console.warn(`${LOG_PREFIX} Blog feed ${feed.name}: parsed 0 items from ${xml.length} bytes`);
+        }
         return items.map((item) => ({ ...item, feedName: feed.name }));
       }),
     );
@@ -776,9 +787,9 @@ function parseGitHubTrendingHTML(html: string, language: string): GitHubTrending
       .replace(/<[^>]+>/g, "")
       .trim();
 
-    // Stars today from "N stars today" text
+    // Stars from "N stars today" or "N stars this week" text
     const starsMatch = block.match(
-      /(\d[\d,]*)\s+stars?\s+today/i,
+      /(\d[\d,]*)\s+stars?\s+(?:today|this\s+week|this\s+month)/i,
     );
     const starsToday = starsMatch
       ? parseInt(starsMatch[1].replace(/,/g, ""), 10)