fix(deps): pin @mariozechner/pi-ai and pi-agent-core to 0.67.1

Users on slow npm mirrors (taobao/cnpm/etc.) hit
'No matching version found for @mariozechner/pi-ai@^0.67.4' when
running 'npm install -g @actalk/inkos@latest'. The caret range in
inkos-core ('^0.67.1') resolves to pi-agent-core@0.67.4, whose own
package.json tightens pi-ai to '^0.67.4'. If the mirror has not yet
synced pi-ai@0.67.4, the install breaks.

Add npm 'overrides' to packages/cli/package.json (the published root)
and pnpm.overrides to the workspace root so both end-user installs
and local dev pin to a known-good version. Bumping pi-mono now
becomes a deliberate edit rather than an automatic, mirror-dependent
upgrade.

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

package.json

@@ -32,5 +32,11 @@
   "engines": {
     "node": ">=20.0.0",
     "pnpm": ">=9.0.0"
+  },
+  "pnpm": {
+    "overrides": {
+      "@mariozechner/pi-ai": "0.67.1",
+      "@mariozechner/pi-agent-core": "0.67.1"
+    }
   }
 }

packages/cli/package.json

@@ -61,5 +61,9 @@
     "ink-testing-library": "^4.0.0",
     "typescript": "^5.8.0",
     "vitest": "^3.0.0"
+  },
+  "overrides": {
+    "@mariozechner/pi-ai": "0.67.1",
+    "@mariozechner/pi-agent-core": "0.67.1"
   }
 }

pnpm-lock.yaml

@@ -4,6 +4,10 @@ settings:
   autoInstallPeers: true
   excludeLinksFromLockfile: false
 
+overrides:
+  '@mariozechner/pi-ai': 0.67.1
+  '@mariozechner/pi-agent-core': 0.67.1
+
 importers:
 
   .: {}
@@ -63,10 +67,10 @@ importers:
   packages/core:
     dependencies:
       '@mariozechner/pi-agent-core':
-        specifier: ^0.67.1
+        specifier: 0.67.1
         version: 0.67.1(@modelcontextprotocol/sdk@1.29.0(zod@3.25.76))(ws@8.20.0)(zod@3.25.76)
       '@mariozechner/pi-ai':
-        specifier: ^0.67.1
+        specifier: 0.67.1
         version: 0.67.1(@modelcontextprotocol/sdk@1.29.0(zod@3.25.76))(ws@8.20.0)(zod@3.25.76)
       '@sinclair/typebox':
         specifier: ^0.34.49