feat(codex-link): AITURK work routing setting and beta.40

- Default routing rule (user decision, 15 Oct 2026): repeating/scheduled work goes to the AITURK IDE bot as a cron job; coding stays in Codex (itself or its subagents); 'Codex' or 'sen yap' keeps everything in Codex.
- Settings > Codex Bağlama: choice (recommended / send large work / never / custom text) with a text box and restore-default; written to bridge.json aiturk_hat.
- Bridge re-reads aiturk_hat when bridge.json changes: no restart. IDE apply keeps aiturk_hat instead of wiping it.
- Bridge version 20, IDE 1.0.0-beta.40. Jev untouched.

apps/desktop/electron/is-hatti-settings.test.ts

@@ -0,0 +1,24 @@
+import { describe, expect, it } from 'vitest'
+
+import { readIsHatti, writeIsHatti } from './is-hatti-settings'
+
+describe('AITURK iş hattı settings', () => {
+  it('defaults to the recommended rule and reads older files the way the bridge does', () => {
+    expect(readIsHatti(null)).toEqual({ secim: 'onerilen', talimat: '' })
+    expect(readIsHatti('{"aiturk_hat":{"enabled":false}}').secim).toBe('kapali')
+    expect(readIsHatti('{"aiturk_hat":{"talimat":"x"}}')).toEqual({ secim: 'ozel', talimat: 'x' })
+    expect(readIsHatti('bozuk').secim).toBe('onerilen')
+  })
+
+  it('writes only aiturk_hat and keeps everything else', () => {
+    const raw = '{"port":8795,"aiturk_hat":{"enabled":false,"komut":"k"}}'
+    const out = JSON.parse(writeIsHatti(raw, { secim: 'buyuk', talimat: '' }))
+    expect(out).toEqual({ port: 8795, aiturk_hat: { komut: 'k', secim: 'buyuk', talimat: '' } })
+  })
+
+  it('rejects an empty custom text and unknown choices', () => {
+    expect(() => writeIsHatti(null, { secim: 'ozel', talimat: '  ' })).toThrow()
+    expect(() => writeIsHatti(null, { secim: 'x', talimat: '' })).toThrow()
+    expect(() => writeIsHatti('{bozuk', { secim: 'onerilen', talimat: '' })).toThrow()
+  })
+})