chore(release): prepare v1.0.2 — polish patch

Four small backlog items bundled:

- New: hide chat (and every other plugin window) while the New Game+
  menu is open. Settings -> Window -> Frame, default off. Skips the
  whole WindowSystem.Draw() pass while QuestRedo is visible, mirroring
  the existing HideInLoadingScreens pattern.
- New: tint the channel selector button in the active channel colour.
  Settings -> Appearance -> Colours, default on. Reuses the existing
  inputColour computation (incl. ExtraChat override) and adds an
  ImGuiCol.Button push around the selector. New ColourUtil helper
  AdjustBrightness derives hover/active variants.
- Fix: PayloadHandler.InlineIcon hardcoded all hover icons to 32x32.
  Replaced with float-based aspect-ratio-preserving shrink, single
  scale-factor, zero-size guard, named MaxInlineIconSize constant.
  Affects six call sites (status, item, achievement and other inline
  hover paths).
- Diagnostic: HideState transitions log on Verbose level for both
  ChatLogWindow and Popout.

Manifest bumped to 1.0.2 across csproj, yaml, repo.json. CHANGELOG
entry added, README version line updated. yaml + repo.json changelog
trimmed to the slim 4-version window (1.0.2, 1.0.1, 1.0.0, 0.6.1).

HellionChat/Util/ColourUtil.cs

@@ -48,4 +48,18 @@ internal static class ColourUtil {
 
     internal static uint ComponentsToRgba(byte red, byte green, byte blue, byte alpha = 0xFF)
         => alpha | (uint) (red << 24) | (uint) (green << 16) | (uint) (blue << 8);
+
+    internal static uint AdjustBrightness(uint abgr, float factor)
+    {
+        var a = (byte) ((abgr & 0xFF000000) >> 24);
+        var b = (byte) ((abgr & 0x00FF0000) >> 16);
+        var g = (byte) ((abgr & 0x0000FF00) >> 8);
+        var r = (byte)  (abgr & 0x000000FF);
+
+        var nr = (byte) Math.Clamp(r * factor, 0f, 255f);
+        var ng = (byte) Math.Clamp(g * factor, 0f, 255f);
+        var nb = (byte) Math.Clamp(b * factor, 0f, 255f);
+
+        return ((uint) a << 24) | ((uint) nb << 16) | ((uint) ng << 8) | nr;
+    }
 }