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/resim_context.py

@@ -59,7 +59,8 @@ def resimleri_sadelestir(req, tut_bayt=TUT_BAYT, gorsel=False):
         return 0, 0
     son_kullanici = None
     for i, it in enumerate(inp):
-        if isinstance(it, dict) and it.get('type') == 'message' and it.get('role') == 'user':
+        # 'type' alani olmayan mesaj da mesajdir (Responses girdisinde varsayilan tur).
+        if isinstance(it, dict) and it.get('type', 'message') == 'message' and it.get('role') == 'user':
             son_kullanici = i
     koru = set()
     if son_kullanici is not None:
@@ -72,7 +73,7 @@ def resimleri_sadelestir(req, tut_bayt=TUT_BAYT, gorsel=False):
         kalan = tut_bayt - sum(_boyut(p) for i in koru for p in inp[i].get('content') or [] if _medya_mi(p))
         for i in range(len(inp) - 1, -1, -1):
             it = inp[i]
-            if i in koru or not (isinstance(it, dict) and it.get('type') == 'message' and it.get('role') == 'user'):
+            if i in koru or not (isinstance(it, dict) and it.get('type', 'message') == 'message' and it.get('role') == 'user'):
                 continue
             icerik = it.get('content')
             resimler = [p for p in icerik if _medya_mi(p) and MEDYA_TURLERI.get(p.get('type')) == 'resim'] \