fix: address code review findings

- Fix accent color CSS variable: write to --or-accent-override
- Fix actionDelete double-fire: toolbar button first, key fallback
- Fix localStorage collision: use chrome.storage.local for sidebar
- Fix updateSettings preserving keyboard selection state
- Add document.body guard for count badge creation

content/keyboard.js

@@ -90,6 +90,7 @@ window.OutlookRelook.Keyboard = (function () {
   // --- Selection count badge ---
 
   function createCountBadge() {
+    if (!document.body) return null;
     var badge = document.createElement('div');
     badge.className = 'or-kb-selection-count';
     badge.style.opacity = '0';
@@ -99,6 +100,7 @@ window.OutlookRelook.Keyboard = (function () {
 
   function updateCountBadge() {
     if (!countBadge) countBadge = createCountBadge();
+    if (!countBadge) return;
     var count = selectedSet.size;
     if (count === 0) {
       countBadge.style.opacity = '0';
@@ -141,20 +143,22 @@ window.OutlookRelook.Keyboard = (function () {
 
   function actionDelete(targets) {
     performAction(targets, function () {
-      // Try keyboard shortcut first (Delete key)
-      var deleteEvent = new KeyboardEvent('keydown', {
-        key: 'Delete',
-        code: 'Delete',
-        bubbles: true,
-        cancelable: true
-      });
-      document.activeElement.dispatchEvent(deleteEvent);
-
-      // Fallback: find and click the delete button in the toolbar
+      // Find and click the delete button in the toolbar
       var deleteBtn = document.querySelector(
         '[aria-label*="Delete" i][role="button"], [aria-label*="delete" i][role="menuitem"]'
       );
-      if (deleteBtn) deleteBtn.click();
+      if (deleteBtn) {
+        deleteBtn.click();
+      } else {
+        // Fallback: try dispatching Delete key
+        var deleteEvent = new KeyboardEvent('keydown', {
+          key: 'Delete',
+          code: 'Delete',
+          bubbles: true,
+          cancelable: true
+        });
+        document.activeElement.dispatchEvent(deleteEvent);
+      }
     });
   }
 
@@ -436,9 +440,15 @@ window.OutlookRelook.Keyboard = (function () {
   }
 
   function updateSettings(settings) {
-    stop();
+    var wasEnabled = currentSettings.keyboardMultiSelect;
+    var isEnabled = settings.keyboardMultiSelect;
     currentSettings = settings;
-    start(settings);
+
+    // Only tear down and restart if the keyboard setting itself changed
+    if (wasEnabled !== isEnabled) {
+      stop();
+      start(settings);
+    }
   }
 
   function stop() {