Merge branch 'feature/menu-shortcuts'

The ⌥ purge alternate carries the same key equivalent as Cleanup —
alternate pairing requires it — so ⌥C triggers the purge variant.
The shortcut list in the Tips window is updated accordingly.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

BrewBar/BrewBarApp.swift

@@ -95,9 +95,10 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         outdatedItem.submenu = outdatedSubmenu
         outdatedItem.isHidden = true // shown once a fetch finds outdated packages
         menu.addItem(outdatedItem)
-        menu.addItem(NSMenuItem(title: "🧹 Cleanup", action: #selector(cleanupAction), keyEquivalent: ""))
-        // isAlternate swaps this in for the item right above while ⌥ is held
-        let purgeItem = NSMenuItem(title: "🧹 Cleanup (purge cache)", action: #selector(cleanupPurgeAction), keyEquivalent: "")
+        menu.addItem(NSMenuItem(title: "🧹 Cleanup", action: #selector(cleanupAction), keyEquivalent: "c"))
+        // isAlternate swaps this in for the item right above while ⌥ is held;
+        // the pairing requires the same key equivalent with other modifiers
+        let purgeItem = NSMenuItem(title: "🧹 Cleanup (purge cache)", action: #selector(cleanupPurgeAction), keyEquivalent: "c")
         purgeItem.keyEquivalentModifierMask = .option
         purgeItem.isAlternate = true
         menu.addItem(purgeItem)
@@ -106,7 +107,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
         menu.addItem(NSMenuItem.separator())
 
         menu.addItem(NSMenuItem(title: "⚙️ Settings…", action: #selector(showSettings), keyEquivalent: ","))
-        menu.addItem(NSMenuItem(title: "💡 Tips", action: #selector(showTips), keyEquivalent: ""))
+        menu.addItem(NSMenuItem(title: "💡 Tips", action: #selector(showTips), keyEquivalent: "t"))
 
         versionItem = NSMenuItem(title: "🏷 Brew: ...", action: nil, keyEquivalent: "")
         menu.addItem(versionItem)

BrewBar/TipsWindowController.swift

@@ -9,7 +9,7 @@ class TipsWindowController: NSWindowController {
          "With the menu open, hold Option (⌥): Cleanup becomes Cleanup (purge cache), which also empties Homebrew's download cache (brew cleanup --prune=all). Downloads are simply re-fetched when next needed."),
 
         ("Keyboard shortcuts",
-         "While the menu is open: R refreshes, U upgrades formulae & casks, L opens the logs, comma (,) opens Settings and Q quits."),
+         "While the menu is open: R refreshes, U upgrades formulae & casks, C cleans up, L opens the logs, T shows these tips, comma (,) opens Settings and Q quits."),
 
         ("Upgrade only one kind",
          "When both formulae and casks are outdated, an “Upgrade only…” submenu appears under the main upgrade item to handle just one of the two."),