fix: patch 7 critical bugs affecting all non-dev-machine users and Windows

1. Fix esbuild inlining build-machine __dirname as string literal — use
   CJS-compatible runtime banner with require("node:url").fileURLToPath
   across worker-service, mcp-server, and context-generator builds.

2. Fix isMainModule check missing .cjs extension and Windows backslash
   path normalization.

3. Wrap extractLastMessage in try-catch to prevent infinite Stop hook
   feedback loop on malformed transcripts (exit 0 instead of exit 2).

4. Replace heavy SessionEnd hook (Node→Bun→1.7MB CJS→HTTP) with
   lightweight inline node -e one-liner (~200ms vs >1s).

5. Add 7 Gemini/OpenRouter error patterns to unrecoverablePatterns
   circuit breaker to prevent 77K+ retry loops on expired API keys.

6. Preserve CLAUDE_CODE_OAUTH_TOKEN and CLAUDE_CODE_GIT_BASH_PATH in
   sanitizeEnv instead of stripping them with the CLAUDE_CODE_ prefix.

7. Use PowerShell -EncodedCommand for spawnDaemon to fix path quoting
   when Windows usernames contain spaces.

Closes #1515, #1495, #1475, #1465, #1500, #1513, #1512, #1450, #1460,
#1486, #1449, #1481, #1451, #1480, #1453, #1445

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/cli/handlers/summarize.ts

@@ -35,7 +35,13 @@ export const summarizeHandler: EventHandler = {
     // Extract last assistant message from transcript (the work Claude did)
     // Note: "user" messages in transcripts are mostly tool_results, not actual user input.
     // The user's original request is already stored in user_prompts table.
-    const lastAssistantMessage = extractLastMessage(transcriptPath, 'assistant', true);
+    let lastAssistantMessage = '';
+    try {
+      lastAssistantMessage = extractLastMessage(transcriptPath, 'assistant', true);
+    } catch (err) {
+      logger.warn('HOOK', `Failed to extract last assistant message: ${err instanceof Error ? err.message : err}`);
+      return { continue: true, suppressOutput: true, exitCode: HOOK_EXIT_CODES.SUCCESS };
+    }
 
     logger.dataIn('HOOK', 'Stop: Requesting summary', {
       hasLastAssistantMessage: !!lastAssistantMessage