chore: bump pi-coding-agent + pi-ai to 0.70.0

Jumps engine, cli, and dashboard from 0.62.0 → 0.70.0. Replaces the
@sinclair/typebox 0.34.x dep with typebox@^1 (SDK migrated in 0.69).
Picks up eight releases of provider-side reliability fixes (Anthropic,
OpenAI Responses/Codex, Bedrock, OpenRouter, Kimi), Opus 4.7 adaptive
thinking support, and a uuid security bump. Code migrations follow in
subsequent commits.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

packages/dashboard/package.json

@@ -51,7 +51,7 @@
     "@codemirror/view": "^6.36.4",
     "@fusion/core": "workspace:*",
     "@fusion/engine": "workspace:*",
-    "@mariozechner/pi-coding-agent": "^0.62.0",
+    "@mariozechner/pi-coding-agent": "^0.70.0",
     "@types/multer": "^2.1.0",
     "@xterm/addon-fit": "^0.10.0",
     "@xterm/addon-search": "^0.15.0",