fix(codex-bridge): audit findings: visible permanent errors, stricter model command, unbuffered stream

From ten independent read-only audits (11 Oct 2026), verified against the code:
- a permanent gateway error (no tools, 401/402/403, bare upstream 400) ends the turn with a visible
  assistant message instead of a silent retry and an empty turn;
- "modeli ... yapma", "X modeli için test yap" and general "hangi model ..." questions are no longer
  commands; a name whose version does not fit, or that several models share, is asked back;
- the stream is forwarded as it arrives (read1) and an upstream drop is no longer logged as a client
  stop nor saved as an interrupted answer;
- a lone "." joining a running turn is removed without the hook messages after it;
- the interrupted-answer note finds the user message behind hook messages and detects completion
  by event type; a per-minute rate limit is not learned as a context window.

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

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

@@ -29,14 +29,24 @@ class Komut(unittest.TestCase):
     def test_spoken_names_resolve_to_one_model(self):
         for text, slug in [("modeli gemini flash low yap", "ide/9router-ag-gemini-3.8-flash-low"),
                            ("Modeli Gemini 3.8 Flash High'a geçir", "ide/9router-ag-gemini-3.8-flash-high"),
-                           ("modeli klod opus yap", "ide/9router-cc-claude-opus-5-5"),
-                           ("modeli opusa geç", "ide/9router-cc-claude-opus-5-5"),
+                           ("modeli klod opus 5 5 yap", "ide/9router-cc-claude-opus-5-5"),
+                           ("modeli opus 5 5'e geç", "ide/9router-cc-claude-opus-5-5"),
                            ("modeli gpt 6 astra yap", "gpt-6-astra"), ("model geç gpt 6.1 sol", "gpt-6.1-sol"),
                            ("modeli glm flaş sansürsüz yap", "ide/9router-nano-z-ai-glm-5.3-flash-uncensored")]:
             self.assertEqual((pick(text) or {}).get("slug"), slug, text)
 
     def test_ambiguous_name_lists_candidates_and_changes_nothing(self):
         self.assertEqual(pick("modeli agnes yap"), {"adaylar": ["agnes/agnes-2.0-flash", "agnes/agnes-2.5-flash"]})
+        self.assertIn("adaylar", pick("modeli klod opus yap"))            # two Opus entries: ask
+        self.assertIn("adaylar", pick("modeli sol yap"))                  # GPT-6-Sol or GPT-6.1-Sol: ask
+        self.assertIn("adaylar", pick("modeli gpt 999 astra yap"))        # words fit, version does not: ask
+
+    def test_negations_and_general_questions_are_not_commands(self):
+        for text in ("modeli gemini flash low yapma", "modeli değiştirme opus kalsın", "GPT 6 Astra modeli için test yap",
+                     "hangi model daha ucuz", "en iyi model hangisi", "modeli seçili dosyaya göre gemini flash low yap"):
+            result = pick(text)
+            self.assertFalse(result and ("slug" in result or result.get("tur") == "sor"), text)
+        self.assertEqual(g.komut_coz("hangi modelsin"), {"tur": "sor"})
 
     def test_ordinary_sentences_are_not_commands(self):
         for text in ("Masaüstünde kaç klasör var", "bu modeli kullanarak bir site yap", "yapay zeka modeli nedir",
@@ -77,7 +87,7 @@ class TurOrtasi(unittest.TestCase):
 class Gecmis(unittest.TestCase):
     def test_handled_commands_in_history_become_notes_but_the_last_message_is_left_alone(self):
         req = {"input": [user("modeli gemini flash low yap"), user("Masaüstünde kaç dosya var"),
-                         voice("modeli opus yap"), user("modeli gpt 6 astra yap")]}
+                         voice("modeli opus 5 5 yap"), user("modeli gpt 6 astra yap")]}
         self.assertEqual(g.gecmisi_temizle(req, MODELS), 2)
         self.assertIn("agy/gemini-3.8-flash-low olarak değiştirdi", req["input"][0]["content"][0]["text"])
         self.assertEqual(req["input"][1]["content"][0]["text"], "Masaüstünde kaç dosya var")