feat: add Expo QR code generation and modal for mobile preview

Introduce Expo QR code functionality to allow users to preview their projects on mobile devices. Added a new QR code modal component, integrated it into the chat and preview components, and implemented Expo URL detection in the shell process. This enhances the mobile development workflow by providing a seamless way to test Expo projects directly on devices.

- Clean up and consolidate Preview icon buttons while removing redundant ones.

pnpm-lock.yaml

@@ -287,6 +287,9 @@ importers:
       react-markdown:
         specifier: ^9.0.1
         version: 9.1.0(@types/react@18.3.20)(react@18.3.1)
+      react-qr-code:
+        specifier: ^2.0.15
+        version: 2.0.15(react@18.3.1)
       react-resizable-panels:
         specifier: ^2.1.7
         version: 2.1.7(react-dom@18.3.1(react@18.3.1))(react@18.3.1)
@@ -6556,6 +6559,9 @@ packages:
     resolution: {integrity: sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==}
     engines: {node: '>=6'}
 
+  qr.js@0.0.0:
+    resolution: {integrity: sha512-c4iYnWb+k2E+vYpRimHqSu575b1/wKl4XFeJGpFmrJQz5I88v9aY2czh7s0w36srfCM1sXgC/xpoJz5dJfq+OQ==}
+
   qs@6.13.0:
     resolution: {integrity: sha512-+38qI9SOr8tfZ4QmJNplMUxqjbe7LKvvZgWdExBOmd+egZTtjLB67Gu0HRX3u/XOq7UU2Nx6nsjvS16Z9uwfpg==}
     engines: {node: '>=0.6'}
@@ -6657,6 +6663,11 @@ packages:
       '@types/react': '>=18'
       react: '>=18'
 
+  react-qr-code@2.0.15:
+    resolution: {integrity: sha512-MkZcjEXqVKqXEIMVE0mbcGgDpkfSdd8zhuzXEl9QzYeNcw8Hq2oVIzDLWuZN2PQBwM5PWjc2S31K8Q1UbcFMfw==}
+    peerDependencies:
+      react: '*'
+
   react-redux@7.2.9:
     resolution: {integrity: sha512-Gx4L3uM182jEEayZfRbI/G11ZpYdNAnBs70lFVMNdHJI76XYtR+7m0MN+eAs7UHBPhWXcnFPaS+9owSCJQHNpQ==}
     peerDependencies:
@@ -15554,6 +15565,8 @@ snapshots:
 
   punycode@2.3.1: {}
 
+  qr.js@0.0.0: {}
+
   qs@6.13.0:
     dependencies:
       side-channel: 1.1.0
@@ -15668,6 +15681,12 @@ snapshots:
     transitivePeerDependencies:
       - supports-color
 
+  react-qr-code@2.0.15(react@18.3.1):
+    dependencies:
+      prop-types: 15.8.1
+      qr.js: 0.0.0
+      react: 18.3.1
+
   react-redux@7.2.9(react-dom@18.3.1(react@18.3.1))(react@18.3.1):
     dependencies:
       '@babel/runtime': 7.27.0