Affichage des crédits extra_usage + parser validé contre réponse réelle

backend/integrations/claude_usage.py

@@ -64,6 +64,22 @@ class Window:
         return f"{m}min"
 
 
+@dataclass
+class ExtraUsage:
+    """Crédits « extra usage » (pay-as-you-go au-delà de l'abonnement)."""
+
+    used: float
+    limit: float | None
+    currency: str = "EUR"
+
+    @property
+    def label(self) -> str:
+        sym = "€" if self.currency == "EUR" else self.currency
+        if self.limit:
+            return f"Extra : {self.used:.0f}{sym} / {self.limit:.0f}{sym}"
+        return f"Extra : {self.used:.0f}{sym}"
+
+
 @dataclass
 class ClaudeUsage:
     ok: bool
@@ -72,6 +88,7 @@ class ClaudeUsage:
     seven_day: Window | None = None
     seven_day_opus: Window | None = None
     seven_day_sonnet: Window | None = None
+    extra: ExtraUsage | None = None
     burn_rate: float | None = None  # tokens/min (ccusage, optionnel)
 
 
@@ -208,11 +225,22 @@ async def fetch_usage() -> ClaudeUsage:
 
     data = resp.json()
     burn = _burn_rate_from_ccusage() if config.ccusage_enabled else None
+
+    extra = None
+    eu = data.get("extra_usage") or {}
+    if eu.get("is_enabled") and eu.get("used_credits"):
+        extra = ExtraUsage(
+            used=float(eu.get("used_credits", 0)),
+            limit=float(eu["monthly_limit"]) if eu.get("monthly_limit") else None,
+            currency=eu.get("currency", "EUR"),
+        )
+
     return ClaudeUsage(
         ok=True,
         five_hour=_parse_window(data.get("five_hour")),
         seven_day=_parse_window(data.get("seven_day")),
         seven_day_opus=_parse_window(data.get("seven_day_opus")),
         seven_day_sonnet=_parse_window(data.get("seven_day_sonnet")),
+        extra=extra,
         burn_rate=burn,
     )