chore: remove unused deps and declare missing ones

Knip-driven cleanup across all workspaces:

Removed (verified zero imports):
- root: @anthropic-ai/claude-agent-sdk, @modelcontextprotocol/sdk,
  expo, react, react-native, react-dom (duplicates of workspace deps)
- server: @ai-sdk/openai, @deepgram/sdk, express-basic-auth,
  fast-uri, mnemonic-id, tiny-invariant, playwright
- app: @expo/vector-icons, @getpaseo/server,
  @react-navigation/bottom-tabs, @react-navigation/elements,
  base64-js, react-native-css, expo-av, expo-font, expo-symbols,
  expo-web-browser, react-native-permissions,
  react-native-popover-view, react-native-securerandom
- cli: @getpaseo/relay
- desktop: @getpaseo/cli
- relay: @cloudflare/workers-types
- website: tailwindcss (provided by @tailwindcss/vite)

Declared (previously hoisted, now explicit):
- root: @types/ws, playwright, ws (used by scripts/)
- server: @mariozechner/pi-ai, @mariozechner/pi-agent-core
- app: expo-asset, qrcode, @types/qrcode, tiny-invariant,
  @xterm/headless, dotenv, jsdom
- cli: vitest
- desktop: vitest

Also removes the stray `/app.json` (obsolete, overridden by
packages/app/app.config.js).

packages/app/package.json

@@ -30,18 +30,14 @@
     "@dnd-kit/core": "^6.3.1",
     "@dnd-kit/sortable": "^10.0.0",
     "@dnd-kit/utilities": "^3.2.2",
-    "@expo/vector-icons": "^15.0.2",
     "@floating-ui/react-native": "^0.10.7",
     "@getpaseo/expo-two-way-audio": "0.1.62",
     "@getpaseo/highlight": "0.1.62",
-    "@getpaseo/server": "0.1.62",
     "@gorhom/bottom-sheet": "^5.2.6",
     "@gorhom/portal": "^1.0.14",
     "@react-native-async-storage/async-storage": "2.2.0",
     "@react-native-masked-view/masked-view": "^0.3.2",
     "@react-native/normalize-colors": "^0.81.5",
-    "@react-navigation/bottom-tabs": "^7.4.0",
-    "@react-navigation/elements": "^2.6.3",
     "@react-navigation/native": "^7.1.8",
     "@tanstack/react-query": "^5.90.11",
     "@tanstack/react-virtual": "^3.13.21",
@@ -54,11 +50,10 @@
     "@xterm/addon-web-links": "^0.12.0",
     "@xterm/addon-webgl": "^0.19.0",
     "@xterm/xterm": "^6.0.0",
-    "base64-js": "^1.5.1",
     "buffer": "^6.0.3",
     "expo": "^54.0.18",
+    "expo-asset": "~12.0.12",
     "expo-audio": "~1.0.13",
-    "expo-av": "^16.0.7",
     "expo-build-properties": "^1.0.9",
     "expo-camera": "~17.0.10",
     "expo-clipboard": "~8.0.7",
@@ -66,7 +61,6 @@
     "expo-crypto": "^15.0.8",
     "expo-dev-client": "^6.0.15",
     "expo-file-system": "~19.0.17",
-    "expo-font": "~14.0.9",
     "expo-haptics": "~15.0.7",
     "expo-image": "~3.0.10",
     "expo-image-picker": "^17.0.8",
@@ -76,34 +70,30 @@
     "expo-router": "~6.0.13",
     "expo-sharing": "^14.0.8",
     "expo-splash-screen": "~31.0.10",
-    "expo-symbols": "~1.0.7",
     "expo-system-ui": "~6.0.7",
     "expo-updates": "~29.0.12",
-    "expo-web-browser": "~15.0.8",
     "fast-deep-equal": "^3.1.3",
     "lucide-react-native": "^0.546.0",
     "mnemonic-id": "^3.2.7",
+    "qrcode": "^1.5.4",
     "react": "19.1.0",
     "react-dom": "19.1.0",
     "react-native": "^0.81.5",
-    "react-native-css": "^3.0.1",
     "react-native-draggable-flatlist": "^4.0.3",
     "react-native-edge-to-edge": "^1.7.0",
     "react-native-gesture-handler": "~2.28.0",
     "react-native-keyboard-controller": "^1.19.2",
     "react-native-markdown-display": "^7.0.2",
     "react-native-nitro-modules": "0.33.8",
-    "react-native-permissions": "^5.4.2",
-    "react-native-popover-view": "^6.1.0",
     "react-native-reanimated": "~4.1.1",
     "react-native-safe-area-context": "~5.6.0",
     "react-native-screens": "~4.16.0",
-    "react-native-securerandom": "^1.0.1",
     "react-native-svg": "^15.14.0",
     "react-native-unistyles": "^3.0.15",
     "react-native-web": "~0.21.0",
     "react-native-webview": "^13.16.0",
     "react-native-worklets": "0.5.1",
+    "tiny-invariant": "^1.3.3",
     "use-sync-external-store": "^1.6.0",
     "zod": "^3.23.8",
     "zustand": "^5.0.9"
@@ -111,12 +101,16 @@
   "devDependencies": {
     "@playwright/test": "^1.56.1",
     "@testing-library/react": "^16.3.2",
+    "@types/qrcode": "^1.5.6",
     "@types/react": "~19.2.0",
     "@types/ws": "^8.18.1",
     "@vitest/browser": "^3.2.4",
+    "@xterm/headless": "^6.0.0",
+    "dotenv": "^17.2.3",
     "eas-cli": "^16.24.1",
     "eslint": "^9.25.0",
     "eslint-config-expo": "~10.0.0",
+    "jsdom": "^20.0.3",
     "material-icon-theme": "^5.32.0",
     "playwright": "^1.56.1",
     "typescript": "~5.9.2",