fix: suppress shortcuts when typing in input fields

Shortcut dispatcher now skips non-modifier keys when focus is in an
editable field. Editor find bar ESC stops propagation to close bar
before modal.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

public/js/modules/shortcuts.js

@@ -87,7 +87,18 @@ export const guards = {
 
 // ── Dispatcher ──
 
+function isEditableTarget() {
+    const el = document.activeElement;
+    if (!el) return false;
+    const tag = el.tagName;
+    if (tag === 'INPUT' || tag === 'TEXTAREA' || tag === 'SELECT') return true;
+    if (el.isContentEditable) return true;
+    return false;
+}
+
 document.addEventListener('keydown', (e) => {
+    const inEditable = isEditableTarget();
+
     for (const s of registry) {
         // Key match
         let matched;
@@ -102,6 +113,10 @@ document.addEventListener('keydown', (e) => {
         }
         if (!matched) continue;
 
+        // Suppress non-modifier shortcuts when focus is in an editable field
+        // (except Escape which should always close overlays)
+        if (inEditable && !s.ctrl && !s.alt && !s.match && e.key !== 'Escape') continue;
+
         // Guard
         if (s.guard && !s.guard()) continue;