feat(aiturk): one-click sign-in for AITURK IDE (1.0.0-beta.14)

The onboarding and provider settings get a Sign in button: the IDE shows a
short code, opens the turkservis.online approval page, and after approval
saves the TurkServis provider itself and hands a separate member key to the
AITURK CLI over stdin (aiturk login --key-stdin --keep-other-account).
Keys never reach the renderer, logs, process arguments or URLs. Pasting an
API key remains as the fallback.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01B8ppceaR5s6cvMnm7uGRnf

apps/desktop/src/global.d.ts

@@ -323,6 +323,14 @@ declare global {
       setDisableF12?: (blocked: boolean) => void
       setPreviewShortcutActive?: (active: boolean) => void
       openExternal: (url: string) => Promise<void>
+      /** One-click TurkServis sign-in (electron/aiturk-login.ts). API keys stay
+       *  in the main process; only the short code and a status come back. */
+      aiturkLogin?: {
+        start: (scope?: { connectionId?: string; profile?: string }) => Promise<AiturkLoginStart>
+        poll: () => Promise<AiturkLoginPoll>
+        cancel: () => Promise<{ ok: true }>
+        overwriteCli: () => Promise<{ cli: AiturkCliStatus }>
+      }
       /** One-shot loopback callback listener for MCP OAuth against remote
        *  backends (electron/mcp-oauth-callback-ipc.ts): bind on THIS machine,
        *  pass redirectUri as client_redirect_uri to mcp.servers.oauth.start,
@@ -1212,6 +1220,20 @@ export type DesktopBootstrapEvent =
       docsUrl: string
     }
 
+export type AiturkCliStatus = 'ok' | 'missing' | 'outdated' | 'other-account' | 'unknown-account' | 'failed'
+
+export interface AiturkLoginStart {
+  userCode: string
+  verificationUri: string
+  expiresAt: number
+}
+
+export type AiturkLoginPoll =
+  | { state: 'pending' }
+  | { state: 'expired' }
+  | { state: 'connected'; cli: AiturkCliStatus }
+  | { state: 'error'; error: string }
+
 export interface HermesApiRequest {
   path: string
   method?: string