review: pin the driver flip and correct the applyMobileDisplayMode contract

- Tighten the held-branch driver assertion to the exact post-release state so
  it pins releaseDesktopTakeBack's flip rather than merely "not mobile".
- applyMobileDisplayMode's doc claimed reclaimTerminalForDesktop gates its
  transitions on the returned convergence flag. No branch does after this
  change; say so, so the gate is not reinstated.

Hooks skipped (machine load); oxfmt --check and oxlint verified clean manually.

src/main/runtime/orca-runtime.ts

@@ -16771,8 +16771,10 @@ export class OrcaRuntimeService {
   // Returns the post-condition "no fit-override remains held" (#7588): `true`
   // when it cleared a held override OR nothing was held to begin with, `false`
   // only when a restore was attempted and the resize failed (override rolled
-  // back, still held). reclaimTerminalForDesktop gates its driver/mode
-  // transitions on this; other callers ignore it.
+  // back, still held). Informational for every caller today —
+  // reclaimTerminalForDesktop deliberately does NOT gate on it, because an
+  // explicit take-back must drop the lock even when the resize cannot
+  // converge. Do not reinstate a convergence gate there.
   async applyMobileDisplayMode(ptyId: string): Promise<boolean> {
     const mode = this.getMobileDisplayMode(ptyId)
     const inner = this.mobileSubscribers.get(ptyId)

src/main/runtime/remote-desktop-driver.test.ts

@@ -545,7 +545,7 @@ describe('remote desktop viewer width driver', () => {
     await expect(runtime.reclaimTerminalForDesktop('pty-1')).resolves.toBe(true)
 
     expect(runtime.getTerminalFitOverride('pty-1')).toBeNull()
-    expect(runtime.getDriver('pty-1').kind).not.toBe('mobile')
+    expect(runtime.getDriver('pty-1')).toEqual({ kind: 'desktop' })
     expect(fitOverrideEvents.slice(notifierBefore).some((e) => e.mode === 'desktop-fit')).toBe(true)
     // A second click must not be needed, and must stay idempotent.
     await expect(runtime.reclaimTerminalForDesktop('pty-1')).resolves.toBe(false)