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/ozet_kopru.py

@@ -266,10 +266,11 @@ def coz_istegi(oge, model, talimat="Sen bir konusma ozeti aktaricisisin."):
 
 
 def sse_metni(govde):
-    """SSE govdesinden (bayt) asistan metnini toplar."""
+    """SSE govdesinden (bayt) asistan metnini toplar. Yanit tamamlanmadiysa (akis yarida kesildi) None doner:
+    yarim metin tam ozet diye kalici onbellege yazilmasin."""
     a = OzetAkisi()
     a.feed(govde if govde.endswith(b"\n\n") else govde + b"\n\n")
-    return a.metin if a.bitti else a._topla()
+    return a.metin if a.bitti else None
 
 
 # ---- Dongu freni ----
@@ -300,6 +301,8 @@ class DonguFreni:
     def izin(self, anahtar, simdi):
         """Bu ozet istegine izin var mi? Varsa kaydeder."""
         zamanlar = [t for t in self.kayit.get(anahtar, []) if simdi - t < self.pencere]
+        if not zamanlar:
+            self.ust_uste.pop(anahtar, None)       # pencere suresi doldu: eski art arda sayaci sohbeti kilitlemesin
         if len(zamanlar) >= self.sinir or self.ust_uste.get(anahtar, 0) >= self.art_arda:
             self.kayit[anahtar] = zamanlar
             return False
@@ -307,7 +310,7 @@ class DonguFreni:
         self.kayit[anahtar] = zamanlar
         self.ust_uste[anahtar] = self.ust_uste.get(anahtar, 0) + 1
         if len(self.kayit) > 500:                      # bellek sismesin
-            for k in sorted(self.kayit, key=lambda k: self.kayit[k][-1])[:250]:
+            for k in sorted(self.kayit, key=lambda k: (self.kayit[k] or [0])[-1])[:250]:
                 self.kayit.pop(k, None)
                 self.ust_uste.pop(k, None)
         return True