feat: P5.5 dev inject + adapter-inspector demo + adapter smoke (P5 complete)

Dev-only POST /v1/dev/webhook/:type signs+injects a sample payload. apps/adapter-
inspector (Vite): inbound raw events + outbound commands/attempts, simulate-inbound
+ test-send buttons. smoke-adapter proves signed->normalized->interaction, bad-sig
401, sandboxed outbound (no network). 55 tests; all 4 smokes pass; boundary enforced.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/adapter-inspector/package.json

@@ -0,0 +1,21 @@
+{
+  "name": "adapter-inspector",
+  "version": "0.0.0",
+  "private": true,
+  "type": "module",
+  "scripts": {
+    "dev": "vite --port 5175",
+    "build": "vite build"
+  },
+  "dependencies": {
+    "react": "^19.0.0",
+    "react-dom": "^19.0.0"
+  },
+  "devDependencies": {
+    "@types/react": "^19.0.0",
+    "@types/react-dom": "^19.0.0",
+    "@vitejs/plugin-react": "^4.3.4",
+    "typescript": "^5.7.3",
+    "vite": "^6.0.7"
+  }
+}