fix(desktop): don't apply shift-to-symbol transformation for chord shortcuts

When Shift is combined with Control, Meta, or Alt, browsers report the base
key (e.g. '1') rather than the shifted symbol (e.g. '!'). The resolveKeyDefinition
function was unconditionally applying the shift transformation whenever Shift was
present in modifiers, causing chord shortcuts like Ctrl+Shift+1 to emit '!' instead
of '1' as the key in the CDP packet.

Only apply the shift-to-symbol mapping for printable keys when Shift is the sole
modifier, matching real browser KeyboardEvent behavior.

Author: cursoragent

apps/desktop/src/preview/PreviewKeyboard.ts

@@ -114,7 +114,8 @@ function resolveKeyDefinition(input: PreviewAutomationPressInput): KeyDefinition
     (definition) => definition.key === input.key || definition.shiftedKey === input.key,
   );
   if (printable) {
-    const shifted = input.modifiers?.includes("Shift") ?? false;
+    const hasNonShiftModifier = input.modifiers?.some((m) => m !== "Shift") ?? false;
+    const shifted = !hasNonShiftModifier && (input.modifiers?.includes("Shift") ?? false);
     const key =
       printable.shiftedKey && (shifted || input.key === printable.shiftedKey)
         ? printable.shiftedKey