feat(icons): wire the universal picker into tabbar/floating settings and keep customsvg through their save paths

手机底部Tab and 右侧悬浮按钮 settings pages swap their icon text inputs
for the shared FaIconPicker (with a new IconValue preview component that
renders FA/sprite/custom SVG values in lists and previews). footer.php
tabbar/floating/sub-item icons and the VIP float render through
aksrt_icon_markup so every stored format displays; GlobalControllerPart1
and the VIP helper drop the FA-only regex gate and sanitize icon values
through aksrt_sanitize_icon_value. The picker popover tabs now wrap
instead of overflowing, and FA grid previews use style-only classes.

inc/helpers/aksrt-runtime-win.php

@@ -43,11 +43,9 @@ if (!function_exists('aksrt_get_float_pay_vip_html')) :
 		}
 
 		$icon = trim((string) ($item['icon'] ?? ''));
-		if ($icon === '') {
-			$icon = 'fa fas fa-gem';
-		}
-		if (!preg_match('/^fa\s+(?:fas|far|fab)\s+fa-[a-z0-9-]+(?:\s+fa-[a-z0-9-]+)*$/i', $icon)) {
-			$icon = 'fa fas fa-gem';
+		$icon_html = aksrt_icon_markup($icon);
+		if ($icon_html === '') {
+			$icon_html = aksrt_icon_markup('fa fas fa-gem');
 		}
 
 		// Logged-in: open modal. Guest: open login.
@@ -72,7 +70,7 @@ if (!function_exists('aksrt_get_float_pay_vip_html')) :
 			: '';
 
 		return '<a class="' . esc_attr($cls) . '" href="javascript:;" role="button" aria-label="' . esc_attr($title) . '" title="' . esc_attr($title) . '"' . $style_attr . $vip_level_attr . '>'
-			. '<i class="' . esc_attr($icon) . '" aria-hidden="true"></i>'
+			. $icon_html
 			. '</a>';
 	}
 endif;