fix: change split-down shortcut to Alt+S to avoid system conflict

- Change split-down from Alt+Shift+D to Alt+S (Alt+Shift is Windows
  keyboard layout switch shortcut)
- Use event.code for keyboard-layout-independent key detection
- Add red theme to dark theme scrollbar selectors
- Add red-themed scrollbar styling with dark red colors
- Tone down white/bright colors in red terminal theme

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/app/src/app/globals.css

@@ -1177,12 +1177,12 @@
 }
 
 /* Custom scrollbar for dark themes */
-:is(.dark, .retro, .dracula, .nord, .monokai, .tokyonight, .solarized, .gruvbox, .catppuccin, .onedark, .synthwave) ::-webkit-scrollbar {
+:is(.dark, .retro, .dracula, .nord, .monokai, .tokyonight, .solarized, .gruvbox, .catppuccin, .onedark, .synthwave, .red) ::-webkit-scrollbar {
   width: 8px;
   height: 8px;
 }
 
-:is(.dark, .retro, .dracula, .nord, .monokai, .tokyonight, .solarized, .gruvbox, .catppuccin, .onedark, .synthwave) ::-webkit-scrollbar-track {
+:is(.dark, .retro, .dracula, .nord, .monokai, .tokyonight, .solarized, .gruvbox, .catppuccin, .onedark, .synthwave, .red) ::-webkit-scrollbar-track {
   background: var(--muted);
 }
 
@@ -1204,6 +1204,20 @@
     background: var(--background);
 }
 
+/* Red theme scrollbar */
+.red ::-webkit-scrollbar-thumb {
+  background: oklch(0.35 0.15 25);
+  border-radius: 4px;
+}
+
+.red ::-webkit-scrollbar-thumb:hover {
+  background: oklch(0.45 0.18 25);
+}
+
+.red ::-webkit-scrollbar-track {
+  background: oklch(0.15 0.05 25);
+}
+
 /* Always visible scrollbar for file diffs and code blocks */
 .scrollbar-visible {
   overflow-y: auto !important;

apps/app/src/components/views/terminal-view/terminal-panel.tsx

@@ -193,8 +193,11 @@ export function TerminalPanel({
         const now = Date.now();
         const canTrigger = now - lastShortcutTimeRef.current > SHORTCUT_COOLDOWN_MS;
 
+        // Use event.code for keyboard-layout-independent key detection
+        const code = event.code;
+
         // Alt+D - Split right
-        if (event.altKey && !event.shiftKey && !event.ctrlKey && !event.metaKey && event.key.toLowerCase() === 'd') {
+        if (event.altKey && !event.shiftKey && !event.ctrlKey && !event.metaKey && code === 'KeyD') {
           event.preventDefault();
           if (canTrigger) {
             lastShortcutTimeRef.current = now;
@@ -203,8 +206,8 @@ export function TerminalPanel({
           return false;
         }
 
-        // Alt+Shift+D - Split down
+        // Alt+S - Split down
-        if (event.altKey && event.shiftKey && !event.ctrlKey && !event.metaKey && event.key.toLowerCase() === 'd') {
+        if (event.altKey && !event.shiftKey && !event.ctrlKey && !event.metaKey && code === 'KeyS') {
           event.preventDefault();
           if (canTrigger) {
             lastShortcutTimeRef.current = now;
@@ -214,7 +217,7 @@ export function TerminalPanel({
         }
 
         // Alt+W - Close terminal
-        if (event.altKey && !event.shiftKey && !event.ctrlKey && !event.metaKey && event.key.toLowerCase() === 'w') {
+        if (event.altKey && !event.shiftKey && !event.ctrlKey && !event.metaKey && code === 'KeyW') {
           event.preventDefault();
           if (canTrigger) {
             lastShortcutTimeRef.current = now;

apps/app/src/config/terminal-themes.ts

@@ -334,26 +334,26 @@ const synthwaveTheme: TerminalTheme = {
 // Red theme - Dark theme with red accents
 const redTheme: TerminalTheme = {
   background: "#1a0a0a",
-  foreground: "#e0d0d0",
+  foreground: "#c8b0b0",
   cursor: "#ff4444",
   cursorAccent: "#1a0a0a",
   selectionBackground: "#5a2020",
   black: "#2a1010",
   red: "#ff4444",
-  green: "#88cc88",
+  green: "#6a9a6a",
-  yellow: "#ffcc66",
+  yellow: "#ccaa55",
-  blue: "#7799cc",
+  blue: "#6688aa",
-  magenta: "#cc6699",
+  magenta: "#aa5588",
-  cyan: "#66aaaa",
+  cyan: "#558888",
-  white: "#e0d0d0",
+  white: "#b0a0a0",
   brightBlack: "#6a4040",
   brightRed: "#ff6666",
-  brightGreen: "#aaddaa",
+  brightGreen: "#88bb88",
-  brightYellow: "#ffdd88",
+  brightYellow: "#ddbb66",
-  brightBlue: "#99bbdd",
+  brightBlue: "#88aacc",
-  brightMagenta: "#dd88bb",
+  brightMagenta: "#cc77aa",
-  brightCyan: "#88cccc",
+  brightCyan: "#77aaaa",
-  brightWhite: "#fff0f0",
+  brightWhite: "#d0c0c0",
 };
 
 // Theme mapping

apps/app/src/store/app-store.ts

@@ -199,7 +199,7 @@ export const DEFAULT_KEYBOARD_SHORTCUTS: KeyboardShortcuts = {
   // Terminal shortcuts (only active in terminal view)
   // Using Alt modifier to avoid conflicts with both terminal signals AND browser shortcuts
   splitTerminalRight: "Alt+D",
-  splitTerminalDown: "Alt+Shift+D",
+  splitTerminalDown: "Alt+S",
   closeTerminal: "Alt+W",
 };