fix: Dice So Nice import v14 compat, override Foundry text colors for readability

- hooks.mjs: replace static dice-so-nice import with dynamic import
  using game.modules.get('dice-so-nice').id (path removed in v14)
- hooks.mjs: fix permission condition (|| -> &&), jQuery -> vanilla JS
- less/base.less: override --color-text-* and --button-text-color
  for both .themed.theme-dark (AppV2) and body.theme-dark (legacy apps)
- target #settings-config buttons + labels + hints for dark grays

less/base.less

@@ -12,6 +12,47 @@ body.system-vermine2047 {
   color: @theme-color-secondary;
 }
 
+// Override Foundry Core default CSS custom properties
+// for better readability on the dark Vermine2047 theme.
+
+// AppV2 windows (sheets) use .themed.theme-dark on their content
+.system-vermine2047 .themed.theme-dark {
+  --color-text-primary: #888888;
+  --color-text-emphatic: #999999;
+  --color-text-secondary: #777777;
+  --color-text-subtle: #666666;
+  --color-text-light-highlight: #888888;
+  --color-text-light-heading: #777777;
+  --color-text-light-primary: #666666;
+}
+
+// Old-style Application windows (settings-config, dialogs) inherit from body.theme-dark
+body.system-vermine2047.theme-dark {
+  --color-text-primary: #888888;
+  --color-text-emphatic: #999999;
+  --color-text-secondary: #777777;
+  --color-text-subtle: #666666;
+  --color-text-light-highlight: #888888;
+  --color-text-light-heading: #777777;
+  --color-text-light-primary: #666666;
+}
+
+#settings-config button,
+#settings-config a.button {
+  --button-text-color: #000000;
+  --button-border-color: #666666;
+  color: #000000;
+}
+
+body.system-vermine2047.theme-dark .form-group > label {
+  color: #777777;
+}
+
+#settings-config p,
+#settings-config .hint {
+  color: #777777;
+}
+
 img {
   border: none;
 }