fix: improve terminal rendering by removing CSS overrides and increasing minimum font size

- Remove CSS overrides that interfere with xterm.js internal sizing
- Increase MIN_FONT_SIZE from 10 to 12 to prevent broken character rendering
- Increase default font sizes from 10/12 to 12/14 (desktop/mobile)
- Add clamping for stored font size values to prevent old tiny values
- Remove !important rules on xterm-viewport that could cause clipping

apps/web/src/components/terminal.tsx

@@ -21,8 +21,8 @@ interface TerminalProps {
 }
 
 const FONT_SIZE_KEY = "terminal-font-size";
-const MIN_FONT_SIZE = 6;
-const MAX_FONT_SIZE = 20;
+const MIN_FONT_SIZE = 12;
+const MAX_FONT_SIZE = 24;
 const RECONNECT_ATTEMPTS = 3;
 const RECONNECT_DELAY_BASE = 1000;
 
@@ -51,9 +51,13 @@ export const TerminalComponent: React.FC<TerminalProps> = ({
   const activeModifierRef = useRef(activeModifier);
   activeModifierRef.current = activeModifier;
   const [fontSize, setFontSize] = useState(() => {
-    if (typeof window === "undefined") return isMobile ? 12 : 10;
+    if (typeof window === "undefined") return isMobile ? 14 : 12;
     const stored = localStorage.getItem(FONT_SIZE_KEY);
-    return stored ? parseInt(stored, 10) : isMobile ? 12 : 10;
+    if (stored) {
+      const parsed = parseInt(stored, 10);
+      return Math.max(MIN_FONT_SIZE, Math.min(MAX_FONT_SIZE, parsed));
+    }
+    return isMobile ? 14 : 12;
   });
   const lastPingRef = useRef<number>(0);
   const heartbeatCheckRef = useRef<number | null>(null);