Survival mode bugfixes and revive mechanism

Outnumbered.Tests/SurvivalEconomyTests.cs

@@ -110,4 +110,79 @@ public class SurvivalEconomyTests
     [InlineData(2, 50, true, 2.25)]
     public void TeamMult_matches(int level, double perPick, bool increase, double expected) =>
         T.Close(expected, SurvivalEconomy.TeamMult(level, perPick, increase));
+
+    // ---- Field Medic revive scaling (defaults: channel 4.0 -0.7/lvl min 1.5; HP 0.35 +0.1/lvl; charges = lvl*1) ----
+    // channelSeconds = max(ReviveChannelMin, ReviveChannelSeconds - (lvl-1)*ReviveChannelPerLevel).
+    [Theory]
+    [InlineData(1, 4.0)]
+    [InlineData(2, 3.3)]
+    [InlineData(3, 2.6)]
+    [InlineData(10, 1.5)]   // -0.7*9 undershoots the 1.5 floor -> clamped
+    public void ReviveChannelSeconds_scales_and_floors(int level, double expected) =>
+        T.Close(expected, SurvivalEconomy.ReviveChannelSeconds(level, T.Surv()));
+
+    // hpFraction = clamp(ReviveHpBase + (lvl-1)*ReviveHpPerLevel, 0.05, 1.0).
+    [Theory]
+    [InlineData(1, 0.35)]
+    [InlineData(2, 0.45)]
+    [InlineData(3, 0.55)]
+    [InlineData(20, 1.0)]   // upper clamp
+    public void ReviveHpFraction_scales_and_clamps(int level, double expected) =>
+        T.Close(expected, SurvivalEconomy.ReviveHpFraction(level, T.Surv()));
+
+    // chargesForWave = lvl <= 0 ? 0 : lvl * ReviveChargesPerLevel. Card-only: level 0 (no card) grants nothing.
+    [Theory]
+    [InlineData(0, 0)]      // not a medic -> no revives
+    [InlineData(1, 1)]
+    [InlineData(2, 2)]
+    [InlineData(3, 3)]
+    public void ReviveChargesForWave_scales(int level, int expected) =>
+        Assert.Equal(expected, SurvivalEconomy.ReviveChargesForWave(level, T.Surv()));
+
+    [Fact]
+    public void FieldMedic_card_is_in_the_catalog() // card-only unlock lives on the draft catalog, cap 3
+    {
+        var card = T.Surv().Cards.Find(c => c.Key == CardKeys.FieldMedic);
+        Assert.NotNull(card);
+        Assert.Equal(3, card!.Cap);
+    }
+
+    // ---- HUD locator math (the arrow direction players are sent + the distance readout) ----
+    // NormalizeDeg wraps to the canonical (-180, 180] (so -180 -> +180).
+    [Theory]
+    [InlineData(0, 0)]
+    [InlineData(45, 45)]
+    [InlineData(180, 180)]
+    [InlineData(-180, 180)]
+    [InlineData(270, -90)]
+    [InlineData(-270, 90)]
+    [InlineData(360, 0)]
+    [InlineData(450, 90)]
+    public void NormalizeDeg_wraps_to_half_open(double input, double expected) =>
+        T.Close(expected, SurvivalEconomy.NormalizeDeg(input));
+
+    // ArrowIndex: relative bearing -> sector. arrows table = { ↑ ↖ ← ↙ ↓ ↘ → ↗ } indexed 0..7; 0 = ahead, CCW = left.
+    [Theory]
+    [InlineData(0, 0)]      // ↑ ahead
+    [InlineData(45, 1)]     // ↖ ahead-left
+    [InlineData(90, 2)]     // ← left
+    [InlineData(135, 3)]    // ↙ behind-left
+    [InlineData(180, 4)]    // ↓ behind
+    [InlineData(-135, 5)]   // ↘ behind-right
+    [InlineData(-90, 6)]    // → right
+    [InlineData(-45, 7)]    // ↗ ahead-right
+    [InlineData(360, 0)]    // wraps to ahead
+    [InlineData(23, 1)]     // rounds up into the ↖ sector
+    [InlineData(22, 0)]     // rounds down into the ↑ sector
+    public void ArrowIndex_maps_bearing_to_sector(double relDeg, int expected) =>
+        Assert.Equal(expected, SurvivalEconomy.ArrowIndex(relDeg));
+
+    // LocatorMeters = max(1, round(dist/divisor)); floors at 1m so a downed ally never reads "0m".
+    [Theory]
+    [InlineData(0, 40, 1)]     // floor
+    [InlineData(20, 40, 1)]    // round(0.5)=0 -> floored to 1
+    [InlineData(120, 40, 3)]
+    [InlineData(200, 40, 5)]
+    public void LocatorMeters_floors_at_one(double dist, double divisor, int expected) =>
+        Assert.Equal(expected, SurvivalEconomy.LocatorMeters(dist, divisor));
 }