fix: improve regex handling and preview limits in TeamMemberLogsFinder and MemberLogsTab

- Enhanced regex patterns in TeamMemberLogsFinder to allow for escaped sequences and increased character limits for text and content previews.
- Updated the MemberLogsTab component to prioritize recent previews over fallback mechanisms, ensuring more relevant message displays for lead users.
- Adjusted the length limit for returned previews to 1500 characters for better context in log summaries.

src/main/services/team/TeamMemberLogsFinder.ts

@@ -1508,25 +1508,29 @@ export class TeamMemberLogsFinder {
    * Looks for the first text block content via regex (avoids full JSON parse).
    */
   private static extractAssistantPreview(line: string): string | null {
-    // Match {"type":"text","text":"..."} blocks
-    const textMatch = /"type"\s*:\s*"text"[^}]*"text"\s*:\s*"([^"]{1,200})/.exec(line);
+    // Match {"type":"text","text":"..."} blocks — allow escaped sequences
+    const textMatch = /"type"\s*:\s*"text"[^}]*"text"\s*:\s*"((?:[^"\\]|\\.){1,400})/.exec(line);
     if (textMatch?.[1]) {
       const raw = textMatch[1]
+        .replace(/\\"/g, '"')
         .replace(/\\n/g, ' ')
         .replace(/\\t/g, ' ')
+        .replace(/\\\\/g, '\\')
         .replace(/\s+/g, ' ')
         .trim();
-      return raw.length > 120 ? raw.slice(0, 120) + '...' : raw;
+      return raw.length > 1500 ? raw.slice(0, 1500) + '...' : raw;
     }
     // Fallback: top-level string content
-    const contentMatch = /"content"\s*:\s*"([^"]{1,200})/.exec(line);
+    const contentMatch = /"content"\s*:\s*"((?:[^"\\]|\\.){1,400})/.exec(line);
     if (contentMatch?.[1]) {
       const raw = contentMatch[1]
+        .replace(/\\"/g, '"')
         .replace(/\\n/g, ' ')
         .replace(/\\t/g, ' ')
+        .replace(/\\\\/g, '\\')
         .replace(/\s+/g, ' ')
         .trim();
-      return raw.length > 120 ? raw.slice(0, 120) + '...' : raw;
+      return raw.length > 1500 ? raw.slice(0, 1500) + '...' : raw;
     }
     return null;
   }
@@ -1536,14 +1540,17 @@ export class TeamMemberLogsFinder {
    * Thinking blocks use {"type":"thinking","thinking":"..."}.
    */
   private static extractThinkingPreview(line: string): string | null {
-    const match = /"thinking"\s*:\s*"([^"]{1,200})/.exec(line);
+    // Allow escaped sequences (e.g. \" \n \\) inside the captured string value
+    const match = /"thinking"\s*:\s*"((?:[^"\\]|\\.){1,400})/.exec(line);
     if (match?.[1]) {
       const raw = match[1]
+        .replace(/\\"/g, '"')
         .replace(/\\n/g, ' ')
         .replace(/\\t/g, ' ')
+        .replace(/\\\\/g, '\\')
         .replace(/\s+/g, ' ')
         .trim();
-      return raw.length > 120 ? raw.slice(0, 120) + '...' : raw;
+      return raw.length > 1500 ? raw.slice(0, 1500) + '...' : raw;
     }
     return null;
   }

src/renderer/components/team/members/MemberLogsTab.tsx

@@ -338,10 +338,12 @@ export const MemberLogsTab = ({
     // Show only AI outputs — the actual work results.
     // If no outputs found, fall back to summary previews.
     if (showLeadPreview) {
+      // Prefer recentPreviews (task-scoped thinking + output) over chunk extraction
+      // because chunks don't capture thinking blocks.
+      const fromPreviews = buildLeadPreviewMessages();
+      if (fromPreviews.length > 0) return fromPreviews;
       const outputs = raw.filter((m) => m.kind !== 'user');
       if (outputs.length > 0) return outputs;
-      const fallback = buildLeadPreviewMessages();
-      if (fallback.length > 0) return fallback;
       return raw; // ultimate fallback: show everything including user messages
     }
     return raw;