feat(hooks): add image/PDF analysis via CLIProxy transformer

Intercept Read tool calls for image/PDF files and route through CLIProxy
with gemini-2.5-flash for vision analysis. Returns text descriptions
instead of blocking, enabling Claude to "see" images via proxy.

Key changes:
- Add image-analyzer-transformer.cjs hook script
- Add ImageAnalysisConfig type and loader
- Add hook installer and profile injector
- Add prompt templates for analysis customization
- Add e2e test suite (excluded from normal CI runs)
- Configure test:e2e script for manual testing

Environment variables:
- CCS_IMAGE_ANALYSIS_ENABLED: Enable/disable (default: 1)
- CCS_IMAGE_ANALYSIS_MODEL: Vision model (default: gemini-2.5-flash)
- CCS_IMAGE_ANALYSIS_TIMEOUT: Timeout in seconds (default: 60)
- CCS_CLIPROXY_API_KEY: API key for CLIProxy auth
- CCS_CLIPROXY_PORT: CLIProxy port (default: 8317)

Closes #426

package.json

@@ -68,10 +68,11 @@
     "verify:bundle": "node scripts/verify-bundle.js",
     "test": "bun run build && bun run test:all",
     "test:ci": "bun run test:all",
-    "test:all": "bun test",
+    "test:all": "bun test tests/unit tests/integration tests/npm",
     "test:unit": "bun test tests/unit/",
     "test:npm": "bun test tests/npm/",
     "test:native": "bash tests/native/unix/edge-cases.sh",
+    "test:e2e": "bun test tests/e2e/ --bail --timeout 60000",
     "dev": "bun run build:server && bun dist/ccs.js config --dev",
     "dev:symlink": "bash scripts/dev-symlink.sh",
     "dev:unlink": "bash scripts/dev-symlink.sh --restore",