feat(codex-bridge): handoff instruction for Codex Desktop only (off by default)

User decision: the "larger work goes to AITURK" instruction lives only in what Codex IDE sees; the CLI must
not know it exists. The bridge adds it in flight by the originator header (measured: Codex Desktop, codex-tui,
codex_exec) and only when a send command is configured.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

apps/desktop/assets/codex-bridge/test_combo_tekrar.py

@@ -40,7 +40,7 @@ class ComboNotResent(unittest.TestCase):
             "fix_tool_ids": lambda req: 0, "drop_foreign_items": lambda req: 0,
             "SseRewriter": Mock(), "log": lambda message: None,
             "DEBUG": False, "UA": "test", "RETRIES": 6, "UPSTREAM_IDLE_TIMEOUT": 3600,
-            "NO_RETRY_PATTERNS": [], "pencere": __import__("pencere"), "IDE_BILGI": {}, "yarim": __import__("yarim"), "nokta_mesaji_mi": lambda req: False, "EXTRA_MODELS": [],
+            "NO_RETRY_PATTERNS": [], "pencere": __import__("pencere"), "IDE_BILGI": {}, "yarim": __import__("yarim"), "is_hatti": __import__("is_hatti"), "GORULEN_ISTEMCI": set(), "nokta_mesaji_mi": lambda req: False, "EXTRA_MODELS": [],
         }
         exec(compile(ast.Module(body=[pick("flatten_request"), pick("claude_sonu_duzelt"), pick("is_timeout"), responses],
                                 type_ignores=[]), "bridge.py", "exec"), self.env)