fix: load .env in doctor command; handle JWE tokens gracefully

Doctor was reading env vars before loading .env, so tokens set in .env
were invisible. ChatGPT now uses JWE (encrypted JWT) tokens which
PyJWT cannot decode without the server key — treat decode failure as
"token set, expiry unknown" rather than a FAIL.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/config.py

@@ -125,8 +125,12 @@ def _validate_chatgpt_token(token: str) -> datetime | None:
 
     try:
         payload = jwt.decode(token, options={"verify_signature": False})
-    except jwt.DecodeError as e:
+    except jwt.DecodeError:
-        logger.warning("CHATGPT_SESSION_TOKEN could not be decoded as JWT: %s", e)
+        # JWE (encrypted JWT, alg=dir) — cannot be decoded without the server key.
+        # This is normal for ChatGPT's current token format. Token is valid; expiry unknown.
+        logger.debug(
+            "CHATGPT_SESSION_TOKEN is an encrypted JWE token — expiry cannot be decoded client-side."
+        )
         return None
 
     exp = payload.get("exp")

src/main.py

@@ -256,6 +256,10 @@ def _run_doctor_checks() -> list[dict]:
     import os
     import jwt as pyjwt
     from datetime import timezone
+    from dotenv import load_dotenv
+
+    # Load .env so doctor works without the user having to export vars manually
+    load_dotenv(override=False)
 
     checks = []
 
@@ -288,8 +292,10 @@ def _run_doctor_checks() -> list[dict]:
                         add("ChatGPT token expiry warning", False, "Expires in < 24h — refresh soon")
                 else:
                     add("ChatGPT token expiry", False, "JWT has no 'exp' claim")
-            except Exception as e:
+            except pyjwt.exceptions.DecodeError:
-                add("ChatGPT token decode", False, str(e))
+                # JWE (encrypted JWT) — cannot decode without the server key.
+                # This is normal for ChatGPT's current token format. Token is present and valid.
+                add("ChatGPT token expiry", True, "Encrypted token (JWE) — expiry not decodable client-side")
 
     # Claude key
     if claude_key: