fix(installer): use backticks for nsJSON literal JSON values

- Changed nsJSON::Set /value "{}" to use backticks `{}` (line 420)
- Rewrote Claude Desktop config creation to use incremental nsJSON::Set calls with backticks
- Changed FileRead + nsJSON::Set /value pattern to nsJSON::Set /file for existing config parsing
- Applied same fix to uninstaller section

Root cause: nsJSON requires backticks for literal JSON values, not double quotes.
User error "Failed to initialize config JSON" traced to line 419 using double quotes.

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

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

Author: Test

.gitignore

@@ -166,6 +166,12 @@ code-indexer-temporal/
 # Temporary analysis and code review reports (session-specific)
 /reports/reviews
 /reports/manual-tests
+/reports/bugs/
+/reports/testing/
+/reports/*.md
+
+# Test mock artifacts (should not be committed)
+/MagicMock/
 
 # TDD Guard runtime data
 .claude/tdd-guard/data/instructions.md