build(desktop): wire the Electron app into the workspace and build graph

Add desktop:dev/build/pack scripts, approve the electron build script in
pnpm-workspace.yaml allowBuilds, and reference apps/desktop (plus its
tests) in the host TypeScript program. Records the electron and
electron-builder deps in the lockfile.

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

package.json

@@ -139,6 +139,9 @@
     "demo:acp": "node --import tsx packages/examples/acp-demo/src/bin.ts --config examples/acp-agent/cordis.yml",
     "mock:llm": "node --import tsx packages/test-support/llm-mock-server/src/bin.ts",
     "dev:web": "tsx scripts/dev-web.ts --poll",
+    "desktop:build": "pnpm run build:lib:host && pnpm --filter @deepseek-ai/dsh-web-frontend run build && pnpm --filter @deepseek-ai/dsh-desktop run build",
+    "desktop:dev": "pnpm run desktop:build && pnpm --filter @deepseek-ai/dsh-desktop exec electron .",
+    "desktop:pack": "pnpm run desktop:build && pnpm --filter @deepseek-ai/dsh-desktop run pack",
     "postinstall": "node scripts/install-lefthook.mjs"
   },
   "devDependencies": {

pnpm-workspace.yaml

@@ -53,6 +53,9 @@ allowBuilds:
   # The Python runtime deploy includes the reviewed workspace postinstall that
   # restores the executable bit on node-pty's macOS spawn helper.
   '@deepseek-ai/dsh-subprocess-local@file:packages/subprocess/subprocess-local': true
+  # The desktop shell depends on the electron npm package; its postinstall
+  # downloads the platform Electron binary the app launches with.
+  electron: true
 
 minimumReleaseAgeExclude:
   # Fresh pi-ai releases carry the model catalog updates that are the whole

tsconfig.host.json

@@ -83,6 +83,7 @@
     "apps/web/tests/workflow-run.e2e.ts",
     "apps/web/stress-tests/reasoning-chunks.stress.ts",
     "apps/cli/tests/**/*.ts",
+    "apps/desktop/tests/**/*.ts",
     "examples/*/src/**/*.ts",
     "examples/*/start.ts",
     "examples/*/tests/**/*.ts",
@@ -293,6 +294,7 @@
     { "path": "./packages/lsp/lsp" },
     { "path": "./packages/lsp/lsp-stdio" },
     { "path": "./packages/lsp/tool-lsp" },
-    { "path": "./apps/cli" }
+    { "path": "./apps/cli" },
+    { "path": "./apps/desktop" }
   ]
 }