fix(macos): attribute the FDA prompts to agent activity, not Orca's own reads

The card said the prompts happen "when this copy of Orca reads protected app
data", but Orca's own reads are small and gated; #9756's trigger is agent
find/grep sweeps into ~/Library/Containers, which macOS bills to Orca because
Orca is the responsible process for every terminal child. Blaming Orca reads
as an accusation and hid why FDA works at all — the grant attaches to Orca
rather than to each churning child binary.

Name agents as the trigger, keep the "reduce" hedge and the terminal caveat,
and drop the "this copy of Orca" dev-build hedge that cost a clause. Assert
the causation wording so it can't silently regress.

src/renderer/src/components/sidebar/FullDiskAccessNudge.test.tsx

@@ -131,8 +131,10 @@ describe('FullDiskAccessNudge', () => {
     expect(container.textContent).toContain('Full Disk Access')
     expect(container.textContent).toContain('Open System Settings')
     // The grant covers this app, not the detached PTY daemon that owns terminals.
-    expect(container.textContent).toContain('Terminal sessions may still prompt separately')
+    expect(container.textContent).toContain('may still prompt separately')
     expect(container.textContent).not.toContain('stops asking')
+    // Agent sweeps trigger these prompts; macOS only names Orca as the responsible process.
+    expect(container.textContent).toContain('agents it runs')
   })
 
   it('stays hidden while the probe is unresolved (no first-paint flash)', async () => {

src/renderer/src/components/sidebar/FullDiskAccessNudge.tsx

@@ -258,7 +258,7 @@ export function FullDiskAccessNudge(): React.JSX.Element | null {
         <p className="mt-1 text-xs leading-snug text-muted-foreground">
           {translate(
             'auto.components.sidebar.FullDiskAccessNudge.body',
-            'Grant Full Disk Access to reduce repeated macOS prompts when this copy of Orca reads protected app data. Terminal sessions may still prompt separately.'
+            "These prompts come from Orca and the agents it runs reading other apps' data. Full Disk Access reduces them; terminal sessions may still prompt separately."
           )}
         </p>
         <Button

src/renderer/src/i18n/locales/en.json

@@ -4835,7 +4835,7 @@
           "title": "Reduce macOS permission prompts",
           "dismissAriaLabel": "Dismiss Full Disk Access suggestion",
           "dismiss": "Dismiss",
-          "body": "Grant Full Disk Access to reduce repeated macOS prompts when this copy of Orca reads protected app data. Terminal sessions may still prompt separately.",
+          "body": "These prompts come from Orca and the agents it runs reading other apps' data. Full Disk Access reduces them; terminal sessions may still prompt separately.",
           "opening": "Opening…",
           "openSystemSettings": "Open System Settings"
         }

src/renderer/src/i18n/locales/es.json

@@ -4812,7 +4812,7 @@
           "title": "Reduce macOS permission prompts",
           "dismissAriaLabel": "Dismiss Full Disk Access suggestion",
           "dismiss": "Dismiss",
-          "body": "Grant Full Disk Access to reduce repeated macOS prompts when this copy of Orca reads protected app data. Terminal sessions may still prompt separately.",
+          "body": "These prompts come from Orca and the agents it runs reading other apps' data. Full Disk Access reduces them; terminal sessions may still prompt separately.",
           "opening": "Opening…",
           "openSystemSettings": "Open System Settings"
         }

src/renderer/src/i18n/locales/ja.json

@@ -4812,7 +4812,7 @@
           "title": "Reduce macOS permission prompts",
           "dismissAriaLabel": "Dismiss Full Disk Access suggestion",
           "dismiss": "Dismiss",
-          "body": "Grant Full Disk Access to reduce repeated macOS prompts when this copy of Orca reads protected app data. Terminal sessions may still prompt separately.",
+          "body": "These prompts come from Orca and the agents it runs reading other apps' data. Full Disk Access reduces them; terminal sessions may still prompt separately.",
           "opening": "Opening…",
           "openSystemSettings": "Open System Settings"
         }

src/renderer/src/i18n/locales/ko.json

@@ -4812,7 +4812,7 @@
           "title": "Reduce macOS permission prompts",
           "dismissAriaLabel": "Dismiss Full Disk Access suggestion",
           "dismiss": "Dismiss",
-          "body": "Grant Full Disk Access to reduce repeated macOS prompts when this copy of Orca reads protected app data. Terminal sessions may still prompt separately.",
+          "body": "These prompts come from Orca and the agents it runs reading other apps' data. Full Disk Access reduces them; terminal sessions may still prompt separately.",
           "opening": "Opening…",
           "openSystemSettings": "Open System Settings"
         }

src/renderer/src/i18n/locales/zh.json

@@ -4812,7 +4812,7 @@
           "title": "Reduce macOS permission prompts",
           "dismissAriaLabel": "Dismiss Full Disk Access suggestion",
           "dismiss": "Dismiss",
-          "body": "Grant Full Disk Access to reduce repeated macOS prompts when this copy of Orca reads protected app data. Terminal sessions may still prompt separately.",
+          "body": "These prompts come from Orca and the agents it runs reading other apps' data. Full Disk Access reduces them; terminal sessions may still prompt separately.",
           "opening": "Opening…",
           "openSystemSettings": "Open System Settings"
         }