fix: add /api/logs route (fix gitignore that was blocking it)

- Fix .gitignore: logs/ -> /logs/ to only ignore root logs dir
- Add app/api/logs/route.ts (was being ignored by gitignore)

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -49,8 +49,8 @@ pgdata/
 migration-report-*.json
 *.sql
 
-# Logs
-logs/
+# Logs (only root logs directory, not app/api/logs)
+/logs/
 *.log
 
 # OS files

app/api/logs/route.ts

@@ -0,0 +1,68 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { SQLiteClient } from '@/services/database/sqlite-client';
+import { LogEntry, LogsResponse } from '@/types/logs';
+
+export async function GET(request: NextRequest) {
+  try {
+    const searchParams = request.nextUrl.searchParams;
+    const page = Math.max(parseInt(searchParams.get('page') || '1', 10), 1);
+    const limit = Math.min(Math.max(parseInt(searchParams.get('limit') || '100', 10), 1), 500);
+    const threadId = searchParams.get('threadId')?.trim() || null;
+    const traceId = searchParams.get('traceId')?.trim() || null;
+    const tableFilter = searchParams.get('table')?.trim() || null;
+
+    const db = SQLiteClient.getInstance();
+
+    let result;
+    if (threadId) {
+      result = db.query<LogEntry>(
+        `SELECT id, ts, table_name, action, row_id, summary, snapshot_json, enriched_summary
+         FROM logs
+         WHERE table_name = 'chats' AND json_extract(snapshot_json, '$.thread') = ?
+         ORDER BY id ASC`,
+        [threadId]
+      );
+    } else if (traceId) {
+      result = db.query<LogEntry>(
+        `SELECT id, ts, table_name, action, row_id, summary, snapshot_json, enriched_summary
+         FROM logs
+         WHERE json_extract(snapshot_json, '$.trace_id') = ?
+         ORDER BY id ASC`,
+        [traceId]
+      );
+    } else {
+      const offset = (page - 1) * limit;
+      const params: Array<string | number> = [limit, offset];
+      const tableClause = tableFilter ? `WHERE table_name = ?` : '';
+      if (tableFilter) {
+        params.unshift(tableFilter);
+      }
+
+      result = db.query<LogEntry>(
+        `SELECT id, ts, table_name, action, row_id, summary, snapshot_json, enriched_summary
+         FROM logs
+         ${tableClause}
+         ORDER BY id DESC
+         LIMIT ? OFFSET ?`,
+        params
+      );
+    }
+    
+    const response: LogsResponse = {
+      logs: result.rows,
+      page,
+      limit,
+      threadId: threadId || undefined,
+      traceId: traceId || undefined,
+      table: tableFilter || undefined
+    };
+    
+    return NextResponse.json(response);
+  } catch (error) {
+    console.error('Failed to fetch logs:', error);
+    return NextResponse.json(
+      { error: 'Failed to fetch logs' },
+      { status: 500 }
+    );
+  }
+}