fix(desktop): respect local-origin tauri shell for directory access (#391)

* feat: enable local-origin desktop features and copy in terminal support

- Enable arbitrary web loads in desktop web content for TAURI apps.
- Guard directory dialog access behind local-origin origin check.
- Add copy-to-clipboard support for terminal selections via common shortcuts.

* fix: improve initial directory resolution and persistence in directory store

packages/desktop/src-tauri/Info.plist

@@ -18,5 +18,10 @@
 	<string>OpenChamber needs microphone access for voice input.</string>
 	<key>NSSpeechRecognitionUsageDescription</key>
 	<string>OpenChamber needs speech recognition to transcribe voice input.</string>
+	<key>NSAppTransportSecurity</key>
+	<dict>
+		<key>NSAllowsArbitraryLoadsInWebContent</key>
+		<true/>
+	</dict>
 </dict>
 </plist>