Add duty cycle display to repeaters. Closes #308.

app/models.py

@@ -602,6 +602,15 @@ class RepeaterRadioSettingsResponse(BaseModel):
     radio: str | None = Field(default=None, description="Radio settings (freq,bw,sf,cr)")
     tx_power: str | None = Field(default=None, description="TX power in dBm")
     airtime_factor: str | None = Field(default=None, description="Airtime factor")
+    duty_cycle_limit: str | None = Field(
+        default=None,
+        description=(
+            "Configured duty-cycle limit as a percentage string (e.g. '25.0%'), derived "
+            "by firmware from airtime_factor (100/(af+1)). This is the configured ceiling, "
+            "not the current measured duty cycle. Only available on firmware >= 1.15; None "
+            "on older nodes that don't support 'get dutycycle'."
+        ),
+    )
     repeat_enabled: str | None = Field(default=None, description="Repeat mode enabled")
     flood_max: str | None = Field(default=None, description="Max flood hops")
 

app/routers/repeaters.py

@@ -345,10 +345,20 @@ async def repeater_radio_settings(public_key: str) -> RepeaterRadioSettingsRespo
             ("get radio", "radio"),
             ("get tx", "tx_power"),
             ("get af", "airtime_factor"),
+            ("get dutycycle", "duty_cycle_limit"),
             ("get repeat", "repeat_enabled"),
             ("get flood.max", "flood_max"),
         ],
     )
+    # `get dutycycle` only exists on firmware >= 1.15. Older nodes fall through to
+    # the generic unknown-config handler and reply "??: dutycycle" (or an ERROR
+    # string), which extract_response_text passes back verbatim. Drop those so the
+    # field reads as unsupported rather than surfacing the sentinel to the UI.
+    dc = results.get("duty_cycle_limit")
+    if dc is not None:
+        dc = dc.strip()
+        if dc.startswith("??") or dc.lower().startswith("error"):
+            results["duty_cycle_limit"] = None
     return RepeaterRadioSettingsResponse(**results)