rename: Outlook Relook → Outcut, add keyboard presets, remove design UI from popup

- Rename extension to "Outcut" throughout all source files and console logs
- Add KEY_PRESETS object (gmail/outlook) and matchesAction() helper to keyboard.js
- Rewrite handleKeydown to use preset-based dispatch instead of hardcoded switch
- Update updateSettings to re-init when keyboardPreset changes
- Add keyboardPreset: 'gmail' default to settings-defaults.js
- Replace popup Design Tweaks UI with preset dropdown + dynamic help text
- Keep all design tweak content script logic intact (activatable via storage)
- Update manifest: version 1.0.0, remove activeTab, add homepage_url

content/injector.js

@@ -60,13 +60,13 @@ window.OutlookRelook.Injector = (function () {
                 for (var j = 0; j < menuItems.length; j++) {
                   if (/mark all as read/i.test(menuItems[j].textContent)) {
                     menuItems[j].click();
-                    console.log('[Outlook Relook] Marked all as read');
+                    console.log('[Outcut] Marked all as read');
                     return;
                   }
                 }
                 // Close context menu if option not found
                 document.body.click();
-                console.warn('[Outlook Relook] "Mark all as read" menu item not found');
+                console.warn('[Outcut] "Mark all as read" menu item not found');
               }, 300);
             }
           };
@@ -244,7 +244,7 @@ window.OutlookRelook.Injector = (function () {
     currentSettings = settings;
     setupMarkAllRead();
     setupFolderJump();
-    console.log('[Outlook Relook] Injector started');
+    console.log('[Outcut] Injector started');
   }
 
   function updateSettings(settings) {