feat: add @fix_plan.md integration (Phase 2.3)

API Endpoints:
- GET /api/sessions/:id/fix-plan - Generate fix plan markdown from todos
- POST /api/sessions/:id/fix-plan/import - Import todos from markdown
- POST /api/sessions/:id/fix-plan/write - Write @fix_plan.md to working dir
- POST /api/sessions/:id/fix-plan/read - Read and import from working dir

RalphTracker Methods:
- generateFixPlanMarkdown() - Creates structured markdown with priority sections
- importFixPlanMarkdown() - Parses markdown and imports todos with priorities

UI Features:
- Menu dropdown in Ralph panel (hamburger icon)
- View Fix Plan modal with copy/write buttons
- Import from file button
- Reset Circuit Breaker button
- Fix plan modal with syntax-highlighted textarea

Bump version to 0.1392

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

package.json

@@ -1,6 +1,6 @@
 {
   "name": "claudeman",
-  "version": "0.1391",
+  "version": "0.1392",
   "description": "The missing control plane for Claude Code - run 20 autonomous agents with real-time monitoring and session persistence",
   "type": "module",
   "main": "dist/index.js",