Open script service URLs in-app or external

Adds a Service URLs setting (ask / in-Paseo / external browser) that
controls where URLs from running scripts open on desktop. First click
prompts with a "don't ask again" checkbox; in-Paseo opens a workspace
browser tab. Closing a browser tab now clears its session partition.

packages/desktop/src/preload.ts

@@ -43,6 +43,8 @@ contextBridge.exposeInMainWorld("paseoDesktop", {
   dialog: {
     ask: (message: string, options?: Record<string, unknown>) =>
       ipcRenderer.invoke("paseo:dialog:ask", message, options),
+    askWithCheckbox: (message: string, options: Record<string, unknown>) =>
+      ipcRenderer.invoke("paseo:dialog:askWithCheckbox", message, options),
     open: (options?: Record<string, unknown>) => ipcRenderer.invoke("paseo:dialog:open", options),
   },
   notification: {
@@ -60,5 +62,7 @@ contextBridge.exposeInMainWorld("paseoDesktop", {
   browser: {
     setActivePane: (browserId: string | null) =>
       ipcRenderer.invoke("paseo:browser:set-active-pane", browserId),
+    clearPartition: (browserId: string) =>
+      ipcRenderer.invoke("paseo:browser:clear-partition", browserId),
   },
 });