fix: prevent special key buttons from stealing focus

- Add tabIndex={-1} to all special key buttons to prevent focus
- Add onFocus handler to immediately blur if focused
- Terminal focus stays intact when tapping special keys

apps/web/src/components/special-keys-panel.tsx

@@ -62,7 +62,9 @@ export const SpecialKeysPanel: React.FC<SpecialKeysPanelProps> = ({
               key={key}
               className="special-key-button"
               onPointerDown={(e) => handlePointerDown(e, key)}
+              onFocus={(e) => e.target.blur()}
               type="button"
+              tabIndex={-1}
             >
               {label}
             </button>
@@ -75,7 +77,9 @@ export const SpecialKeysPanel: React.FC<SpecialKeysPanelProps> = ({
               key={key}
               className="special-key-button"
               onPointerDown={(e) => handlePointerDown(e, key)}
+              onFocus={(e) => e.target.blur()}
               type="button"
+              tabIndex={-1}
             >
               {label}
             </button>