fix: native Copy button and copy confirmation in charmap

The hand-rolled Copy button (bold, custom-shaded accent fill) and the floating
accent "toast" pill both looked out of place. Replace the button with the
canonical mtk::draw_button (BUTTON_PRIMARY), matching the Refresh button in
Devices and buttons elsewhere. Replace the floating pill with a plain
"Copied to clipboard" status line in the footer, right-aligned beside the Copy
button, that fades after ~1.6s — no overlay drawn over the character grid.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

programs/src/charmap/main.cpp

@@ -205,14 +205,13 @@ static constexpr int GRID_PAD  = 12;
 static constexpr int CELL_GAP  = 6;
 static constexpr int CELL_TARGET = 54;   // desired tile edge in px
 
-static constexpr int TAB_SIZE   = 16;
 static constexpr int CELL_SIZE  = 26;    // glyph font size inside a tile
 static constexpr int PREVIEW_SIZE = 40;
 static constexpr int NAME_SIZE  = 16;
 static constexpr int META_SIZE  = 14;
-static constexpr int TOAST_SIZE = 14;
+static constexpr int STATUS_SIZE = 14;
 
-static constexpr uint64_t TOAST_MS = 1400;
+static constexpr uint64_t COPIED_MS = 1600;
 
 // ==== App state ====
 
@@ -225,8 +224,7 @@ static int   g_scroll = 0;      // vertical scroll offset in px
 static bool  g_sb_hover = false;    // pointer over the scrollbar track
 static bool  g_sb_dragging = false; // dragging the scrollbar thumb
 static int   g_sb_drag_offset = 0;  // grab point within the thumb
-static uint64_t g_toast_until = 0;
+static uint64_t g_copied_until = 0;  // show the "copied" status until this time
-static char  g_toast[48] = {};
 
 static mtk::Theme g_theme;
 static const char* g_tab_labels[SET_COUNT] = {};  // populated from SETS in _start
@@ -336,16 +334,7 @@ static void copy_selected() {
     char s[2];
     glyph_str(g.byte, s);
     gui::clipboard_set_text(s, 1);
-
+    g_copied_until = montauk::get_milliseconds() + COPIED_MS;
-    // Toast: Copied "<glyph>"
-    int n = 0;
-    const char* pfx = "Copied  ";
-    while (pfx[n]) { g_toast[n] = pfx[n]; n++; }
-    g_toast[n++] = '"';
-    g_toast[n++] = (char)g.byte;
-    g_toast[n++] = '"';
-    g_toast[n] = '\0';
-    g_toast_until = montauk::get_milliseconds() + TOAST_MS;
 }
 
 // ==== Rendering ====
@@ -432,25 +421,20 @@ static void render(Canvas& c) {
     draw_text(c, fonts::system_font, text_x, L.footer.y + 16 + NAME_SIZE + 8,
               meta, g_theme.text_subtle, META_SIZE);
 
-    // Copy button.
+    // Transient "copied" confirmation: a plain status line just left of the
-    Color btn_bg = g_theme.accent;
+    // Copy button (no floating overlay over the grid).
-    if (g_copy_pressed) btn_bg = g_theme.accent_hover;
+    if (g_copied_until && montauk::get_milliseconds() < g_copied_until) {
-    else if (g_copy_hover) btn_bg = mtk::darken(g_theme.accent, 16);
+        const char* msg = "Copied to clipboard";
-    draw_button(c, title_font, L.copy_btn.x, L.copy_btn.y, L.copy_btn.w,
+        int sw = text_width(fonts::system_font, msg, STATUS_SIZE);
-                L.copy_btn.h, "Copy", btn_bg, g_theme.accent_fg,
+        int sh = text_height(fonts::system_font, STATUS_SIZE);
-                g_theme.radius_md, TAB_SIZE);
+        draw_text(c, fonts::system_font, L.copy_btn.x - 14 - sw,
-
+                  L.copy_btn.y + (L.copy_btn.h - sh) / 2,
-    // ---- Toast (drawn last; floats over the lower-right of the grid) ----
+                  msg, g_theme.accent, STATUS_SIZE);
-    if (g_toast[0] && montauk::get_milliseconds() < g_toast_until) {
-        int tw = text_width(fonts::system_font, g_toast, TOAST_SIZE);
-        int pill_w = tw + 24, pill_h = 28;
-        int px = c.w - GRID_PAD - pill_w;
-        int py = L.footer.y - GRID_PAD - pill_h;
-        c.fill_rounded_rect(px, py, pill_w, pill_h, pill_h / 2, g_theme.accent);
-        draw_text(c, fonts::system_font, px + 12,
-                  py + (pill_h - text_height(fonts::system_font, TOAST_SIZE)) / 2,
-                  g_toast, g_theme.accent_fg, TOAST_SIZE);
     }
+
+    // Copy button — canonical MTK primary button, like other Montauk apps.
+    mtk::WidgetState copy_state = mtk::widget_state(false, g_copy_hover, true);
+    mtk::draw_button(c, L.copy_btn, "Copy", mtk::BUTTON_PRIMARY, copy_state, g_theme);
 }
 
 // ==== Event handling ====
@@ -596,9 +580,9 @@ extern "C" void _start() {
 
         if (r < 0) break;
         if (r == 0) {
-            // Expire the toast even when idle so the pill disappears.
+            // Clear the "copied" status once it expires, even when idle.
-            if (toast_shown && g_toast[0] &&
+            if (toast_shown && g_copied_until &&
-                montauk::get_milliseconds() >= g_toast_until) {
+                montauk::get_milliseconds() >= g_copied_until) {
                 Canvas canvas = win.canvas();
                 render(canvas);
                 win.present();