fix(codex-bridge): remaining audit findings (routing, trimming, retries, model list fallback, logging)

Second batch from the ten read-only audits; 126 bridge tests. Among them: a spoken number
("opus beş beş") resolves, a used route no longer expires after 7 days, the local reply says how to
go back, an unrouted 9r/ name gets a local 503 instead of going to chatgpt.com, a combo request is not
resent after the upstream closed it, the last model list is served when chatgpt.com is unreachable,
trimming keeps the real last user message, Claude-member combos use the Claude estimate, CRLF SSE is
handled, log lines carry the date and the status endpoint reports a code fingerprint.

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

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

@@ -27,7 +27,7 @@ class ComboNotResent(unittest.TestCase):
     def setUp(self):
         self.upstream = Mock()
         self.env = {
-            "json": json, "re": __import__("re"), "os": __import__("os"),
+            "json": json, "re": __import__("re"), "os": __import__("os"), "http": __import__("http.client"),
             "time": types.SimpleNamespace(sleep=lambda s: None),
             "urllib": types.SimpleNamespace(
                 request=types.SimpleNamespace(Request=urllib.request.Request, urlopen=self.upstream),
@@ -42,7 +42,7 @@ class ComboNotResent(unittest.TestCase):
             "DEBUG": False, "UA": "test", "RETRIES": 6, "UPSTREAM_IDLE_TIMEOUT": 3600,
             "NO_RETRY_PATTERNS": [], "pencere": __import__("pencere"), "IDE_BILGI": {}, "yarim": __import__("yarim"), "is_hatti": __import__("is_hatti"), "GORULEN_ISTEMCI": set(), "arac_semalarini_duzelt": lambda req: 0, "nokta_mesaji_mi": lambda req: False, "EXTRA_MODELS": [],
         }
-        exec(compile(ast.Module(body=[pick("flatten_request"), pick("claude_sonu_duzelt"), pick("is_timeout"), responses],
+        exec(compile(ast.Module(body=[pick("flatten_request"), pick("claude_sonu_duzelt"), pick("is_timeout"), pick("kopma_mi"), responses],
                                 type_ignores=[]), "bridge.py", "exec"), self.env)
 
     def send(self, model):
@@ -85,6 +85,16 @@ class ComboNotResent(unittest.TestCase):
         self.assertEqual(self.upstream.call_count, 3)
         fake._stream.assert_called_once()
 
+    def test_combo_closed_by_the_peer_before_headers_is_not_resent(self):
+        import http.client
+        for error in (http.client.RemoteDisconnected("closed"), urllib.error.URLError(ConnectionResetError("reset"))):
+            with self.subTest(error=error):
+                self.upstream.reset_mock()
+                self.upstream.side_effect = error
+                fake = self.send("9r/Fusion-Orta")
+                self.assertEqual(self.upstream.call_count, 1)
+                fake._stream.assert_not_called()
+
     def test_single_model_timeout_is_still_retried(self):
         self.upstream.side_effect = [urllib.error.URLError(TimeoutError("timed out")), Mock(status=200)]
         fake = self.send("9r/cc/claude-opus-5-5")