Theme switcher: larger, bordered, stronger shadow for visibility. Bump 03.09.33

- Bigger padding, 36px icon button, 1.25rem icon size
- 2px border (--theme-fab-border): white on dark bg, subtle on light
- Stronger box-shadow with double layer
- Hover scale + glow effect

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/media/css/theme/dark.standard.css

@@ -832,6 +832,7 @@ color-scheme: dark;
 --theme-fab-bg: #e6ebf1;
 --theme-fab-color: #0e1318;
 --theme-fab-btn-bg: transparent;
+--theme-fab-border: rgba(0, 0, 0, 0.15);
 
 /* ===== OFFLINE PAGE ===== */
 --offline-card-bg: rgba(0, 0, 0, 0.6);

src/media/css/theme/light.standard.css

@@ -831,6 +831,7 @@ color-scheme: light;
 --theme-fab-bg: var(--color-primary, #112855);
 --theme-fab-color: #fff;
 --theme-fab-btn-bg: rgba(255,255,255,.15);
+--theme-fab-border: rgba(255, 255, 255, 0.3);
 
 /* ===== OFFLINE PAGE ===== */
 --offline-card-bg: rgba(0, 0, 0, 0.55);