fix: terminal state restoration and abort handling regression

Fixes regression introduced in 1a23bfa430.

- Add restoreTerminalState helper to disable kitty keyboard protocol and
  CSI u key release reporting when switching modes or cleaning up
- Improve claudeLocal abort handling with SIGINT → SIGTERM → SIGKILL
  escalation timeouts for graceful process termination
- Fix useSwitchControls to properly handle CSI u space sequences (0x20)
  and key.name/key.sequence detection for space key presses
- Fix typo: exutFuture → exitFuture in claudeLocalLauncher

cli/src/ui/ink/useSwitchControls.test.ts

@@ -6,6 +6,8 @@ import { useSwitchControls, type ConfirmationMode, type ActionInProgress } from
 
 type Key = {
     ctrl?: boolean;
+    name?: string;
+    sequence?: string;
 };
 
 type SwitchState = {
@@ -194,6 +196,53 @@ describe('useSwitchControls', () => {
         expect(latestState?.actionInProgress).toBe(null);
     });
 
+    it('accepts CSI u space sequences', async () => {
+        const onSwitch = vi.fn();
+        await mount({ onSwitch });
+
+        await triggerInput('\u001b[32u', {});
+        expect(latestState?.confirmationMode).toBe('switch');
+    });
+
+    it('accepts CSI u space sequences with modifiers', async () => {
+        const onSwitch = vi.fn();
+        await mount({ onSwitch });
+
+        await triggerInput('\u001b[32;2u', {});
+        expect(latestState?.confirmationMode).toBe('switch');
+    });
+
+    it('ignores CSI u key-release space sequences', async () => {
+        const onSwitch = vi.fn();
+        await mount({ onSwitch });
+
+        await triggerInput(' ', {});
+        expect(latestState?.confirmationMode).toBe('switch');
+
+        await triggerInput('\u001b[32;2:3u', {});
+        expect(latestState?.confirmationMode).toBe('switch');
+        expect(onSwitch).not.toHaveBeenCalled();
+    });
+
+    it('accepts space via key name when input is empty', async () => {
+        const onSwitch = vi.fn();
+        await mount({ onSwitch });
+
+        await triggerInput('', { name: 'space' });
+        expect(latestState?.confirmationMode).toBe('switch');
+    });
+
+    it('ignores key-release sequences from key.sequence', async () => {
+        const onSwitch = vi.fn();
+        await mount({ onSwitch });
+
+        await triggerInput(' ', {});
+        expect(latestState?.confirmationMode).toBe('switch');
+
+        await triggerInput('', { sequence: '\u001b[1:3u' });
+        expect(latestState?.confirmationMode).toBe('switch');
+    });
+
     it('does not switch on key-release space sequences', async () => {
         const onSwitch = vi.fn();
         await mount({ onSwitch });

cli/src/ui/ink/useSwitchControls.ts

@@ -72,8 +72,14 @@ export function useSwitchControls(opts: {
             return;
         }
 
-        const isKeyRelease = /^\u001b\[[0-9;]*:3u$/.test(input);
-        const isSpace = Boolean(onSwitch) && !isKeyRelease && input === ' ';
+        const sequence = typeof key.sequence === 'string' ? key.sequence : input;
+        const isKeyRelease = typeof sequence === 'string' && /^\u001b\[[0-9;]*:3u$/.test(sequence);
+        const csiUMatch = typeof sequence === 'string'
+            ? sequence.match(/^\u001b\[(\d+)(?:;(\d+))?u$/)
+            : null;
+        const csiUCodepoint = csiUMatch ? Number(csiUMatch[1]) : null;
+        const isCsiUSpace = csiUCodepoint === 32;
+        const isSpace = Boolean(onSwitch) && !isKeyRelease && (input === ' ' || key.name === 'space' || isCsiUSpace);
         const hasPrintableInput = typeof input === 'string' && input.length > 0;
 
         if (isSpace) {