App 2.22.0: Overview style Cockpit, segmented rings and a power trace

A third Overview style beside Tiles and Dashboard: rings for battery,
power (zero at the top, regeneration anticlockwise in green) with the
speed and gear inside, and 5-minute usage with a tick for the average
since start; below, the power of the last two minutes, the clock,
climate and odometer. Unread values light nothing and show "—"; the
trace leaves gaps (PowerTrace, unit-tested). Emulator only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6

app/src/test/java/com/evsuite/abrp/PowerTraceTest.java

@@ -0,0 +1,59 @@
+package com.evsuite.abrp;
+
+import static org.junit.Assert.assertArrayEquals;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+
+/** The Cockpit's power trace buffer — pure JVM. */
+public class PowerTraceTest {
+
+    private static final float NaN = Float.NaN;
+
+    @Test
+    public void emptyIsAllGaps() {
+        float[] v = new PowerTrace(4000, 4).snapshot();
+        assertEquals(4, v.length);
+        for (float f : v) assertTrue(Float.isNaN(f));
+    }
+
+    @Test
+    public void newestIsLastAndOlderSlide() {
+        PowerTrace t = new PowerTrace(4000, 4); // 1 s slots
+        t.add(10_000, 5f);
+        t.add(11_000, 10f);
+        t.add(12_000, -3f);
+        assertArrayEquals(new float[] { NaN, 5f, 10f, -3f }, t.snapshot(), 0f);
+        t.add(13_000, 1f);
+        t.add(14_000, 2f);
+        assertArrayEquals(new float[] { 10f, -3f, 1f, 2f }, t.snapshot(), 0f);
+    }
+
+    @Test
+    public void unreadAndMissedSlotsAreGapsNotZero() {
+        PowerTrace t = new PowerTrace(4000, 4);
+        t.add(10_000, 5f);
+        t.add(11_000, null);
+        t.add(13_000, 7f); // nothing at 12 s
+        assertArrayEquals(new float[] { 5f, NaN, NaN, 7f }, t.snapshot(), 0f);
+    }
+
+    @Test
+    public void aLongPauseClearsEverything() {
+        PowerTrace t = new PowerTrace(4000, 4);
+        t.add(10_000, 5f);
+        t.add(11_000, 6f);
+        t.add(60_000, 8f);
+        assertArrayEquals(new float[] { NaN, NaN, NaN, 8f }, t.snapshot(), 0f);
+    }
+
+    @Test
+    public void laterReadingInTheSameSlotWinsAndTheClockNeverRunsBack() {
+        PowerTrace t = new PowerTrace(4000, 4);
+        t.add(10_000, 5f);
+        t.add(10_500, 6f);
+        t.add(9_000, 99f);
+        assertArrayEquals(new float[] { NaN, NaN, NaN, 6f }, t.snapshot(), 0f);
+    }
+}