feat: add source URLs to notebook + increase research timeout to 10min

Before starting deep research, now adds up to 10 source URLs from
trend discovery to the notebook. This gives NotebookLM real context
(blog posts, HN links, etc.) to research from, matching the workflow
shown in the video.

Also increased research timeout from 5min to 10min since deep
research can take 5-10 minutes to complete.

Author: codercatdev

lib/services/research.ts

@@ -61,10 +61,12 @@ export interface SceneHint {
 }
 
 export interface ResearchConfig {
-  /** Timeout for research polling in ms (default: 300000 = 5 min) */
+  /** Timeout for research polling in ms (default: 600000 = 10 min) */
   researchTimeout?: number;
   /** Timeout for artifact generation in ms (default: 300000 = 5 min) */
   artifactTimeout?: number;
+  /** Source URLs to add to the notebook before research (from trend discovery) */
+  sourceUrls?: string[];
   /** Polling interval for research status in ms (default: 15000 = 15s) */
   pollInterval?: number;
 }
@@ -263,7 +265,7 @@ export async function conductResearch(
   topic: string,
   configOverrides?: ResearchConfig
 ): Promise<ResearchPayload> {
-  const researchTimeout = configOverrides?.researchTimeout ?? 300_000;
+  const researchTimeout = configOverrides?.researchTimeout ?? 600_000;
   const artifactTimeout = configOverrides?.artifactTimeout ?? 300_000;
   const pollInterval = configOverrides?.pollInterval ?? 15_000;
   const createdAt = new Date().toISOString();
@@ -291,6 +293,27 @@ export async function conductResearch(
 
   console.log(`[research] Notebook created: ${notebookId}`);
 
+  // -----------------------------------------------------------------------
+  // Step 2b: Add source URLs from trend discovery (if provided)
+  // -----------------------------------------------------------------------
+  const sourceUrls = configOverrides?.sourceUrls ?? [];
+  if (sourceUrls.length > 0) {
+    console.log(`[research] Adding ${sourceUrls.length} source URLs to notebook...`);
+    const addResults = await Promise.allSettled(
+      sourceUrls.slice(0, 10).map((url) =>
+        safeStep(`add-source-${url.substring(0, 40)}`, () =>
+          client.addSource(notebookId, url)
+        )
+      )
+    );
+    const added = addResults.filter((r) => r.status === 'fulfilled' && r.value).length;
+    console.log(`[research] Added ${added}/${sourceUrls.length} sources to notebook`);
+    // Give NotebookLM a moment to process the sources
+    if (added > 0) {
+      await sleep(5000);
+    }
+  }
+
   // -----------------------------------------------------------------------
   // Step 3: Start deep web research
   // -----------------------------------------------------------------------