feat: ramp-up/down delay fan control

- Add RampUpSteps and RampUpMinDeltaPercent config
- Gradual ramp in both directions (up and down) to reduce fan oscillation
- Fix Advanced tab layout with RowStyles and label alignment

Made-with: Cursor

ChromeboxFanControl/AppConfig.cs

@@ -16,6 +16,8 @@ public sealed class AppConfig
     public string[]? FanDutyArgs { get; set; }
     public string[] AutoFanCtrlArgs { get; set; } = ["autofanctrl"];
     public string TempSource { get; set; } = "AverageCore";
+    public int RampUpSteps { get; set; } = 3;
+    public int RampUpMinDeltaPercent { get; set; } = 20;
     public int FailSafeAfterConsecutiveErrors { get; set; } = 5;
     public int FailSafeFanPercent { get; set; } = 100;
     public bool FailSafeRestoreAutoFan { get; set; }
@@ -81,6 +83,8 @@ public sealed class AppConfig
         if (src.AutoFanCtrlArgs is { Length: > 0 })
             dst.AutoFanCtrlArgs = src.AutoFanCtrlArgs;
         dst.TempSource = string.Equals(src.TempSource, "MaxCore", StringComparison.OrdinalIgnoreCase) ? "MaxCore" : "AverageCore";
+        dst.RampUpSteps = Math.Clamp(src.RampUpSteps, 1, 10);
+        dst.RampUpMinDeltaPercent = Math.Clamp(src.RampUpMinDeltaPercent, 0, 50);
         dst.FailSafeAfterConsecutiveErrors = Math.Max(1, src.FailSafeAfterConsecutiveErrors);
         dst.FailSafeFanPercent = Math.Clamp(src.FailSafeFanPercent, 0, 100);
         dst.FailSafeRestoreAutoFan = src.FailSafeRestoreAutoFan;