feat(chat): theme the :drgx: emoji to the accent (was fixed brand colors)

The custom DragonX chat emoji now recolors to the theme like the logo — body =
accent, detail = white on dark skins / on-surface (dark) on light skins — and
re-rasterizes on a theme/dark-light change (moved out of the one-time fixed-color
load into ensureLogoTexture's re-render block). The detail highlights keep it
legible even on accent-tinted outgoing bubbles.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/app.cpp

@@ -1361,13 +1361,6 @@ void App::handleGlobalShortcuts()
 // theme accent, so it re-rasterizes whenever the accent or the dark↔light variant changes.
 void App::ensureLogoTexture()
 {
-    // DragonX custom chat emoji (":drgx:") — the mark in FIXED brand colors (crimson body + white detail),
-    // rasterized once. Kept theme-independent so it looks identical for the sender and the receiver.
-    if (!drgx_emoji_tex_) {
-        util::LoadTextureFromSvg(embedded::kLogoDragonXSvg, 96, IM_COL32(0xD8, 0x26, 0x52, 0xFF),
-                                 IM_COL32(255, 255, 255, 255), &drgx_emoji_tex_, &drgx_emoji_w_, &drgx_emoji_h_);
-    }
-
     const bool wantDark = ui::material::IsDarkTheme();
     const ImU32 logoAccent = ui::material::Primary();
     if (logo_loaded_ && wantDark == logo_is_dark_variant_ && logoAccent == logo_accent_)
@@ -1378,6 +1371,13 @@ void App::ensureLogoTexture()
     // The SVG's white highlight (detail) stays white on dark skins, but darkens to the theme's on-surface
     // colour on light skins so it doesn't wash out against a light card/background.
     const ImU32 detailCol = wantDark ? IM_COL32(255, 255, 255, 255) : ui::material::OnSurface();
+
+    // ":drgx:" custom chat emoji — themed to the accent like the logo (re-rasterized on theme change).
+    if (drgx_emoji_tex_) util::DestroyTexture(drgx_emoji_tex_);
+    drgx_emoji_tex_ = 0; drgx_emoji_w_ = 0; drgx_emoji_h_ = 0;
+    util::LoadTextureFromSvg(embedded::kLogoDragonXSvg, 96, logoAccent, detailCol,
+                             &drgx_emoji_tex_, &drgx_emoji_w_, &drgx_emoji_h_);
+
     if (logo_tex_) util::DestroyTexture(logo_tex_);   // free the previous texture before replacing
     logo_tex_ = 0; logo_w_ = 0; logo_h_ = 0;
 

src/app.h

@@ -479,8 +479,8 @@ public:
     // Coin logo texture accessor (DragonX currency icon for balance tab)
     ImTextureID getCoinLogoTexture() const { return coin_logo_tex_; }
 
-    // DragonX custom chat emoji (the ":drgx:" shortcode) — the mark in fixed brand colors, lazily
+    // DragonX custom chat emoji (the ":drgx:" shortcode) — the mark recolored to the theme accent (like
-    // rasterized. Used by the emoji picker tile + inline in chat bubbles.
+    // the logo), re-rasterized on theme change. Used by the emoji picker tile + inline in chat bubbles.
     ImTextureID getDrgxEmojiTexture() const { return drgx_emoji_tex_; }
 
     /**
@@ -1089,7 +1089,7 @@ private:
     bool logo_loaded_ = false;
     bool logo_is_dark_variant_ = true; // tracks which variant is currently loaded
     ImU32 logo_accent_ = 0;            // theme accent the SVG logo was last rasterized with (re-render on change)
-    ImTextureID drgx_emoji_tex_ = 0;   // ":drgx:" custom chat emoji (fixed brand colors) — rasterized once
+    ImTextureID drgx_emoji_tex_ = 0;   // ":drgx:" custom chat emoji (themed to the accent, like the logo)
     int drgx_emoji_w_ = 0, drgx_emoji_h_ = 0;
 
     // Coin logo texture (DragonX currency icon, separate from wallet branding)