explain the greedy setting in the settings window

Add a note under the greedy checkbox spelling out what self-updating
casks are and that the setting affects both the outdated listing and
upgrades (Upgrade All and auto-upgrade). The indented-gray-note layout
is extracted into a noteRow helper, now shared with the cask warning.

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

BrewBar/SettingsWindowController.swift

@@ -87,6 +87,10 @@ class SettingsWindowController: NSWindowController {
             action: #selector(toggleGreedy(_:))
         )
 
+        let greedyNote = noteRow(
+            "Some apps (Chrome, Firefox…) update themselves, so Homebrew normally ignores them. When enabled, BrewBar also lists them as outdated and includes them in Upgrade All and auto-upgrades."
+        )
+
         autoUpgradeFormulaeCheckbox = NSButton(
             checkboxWithTitle: "Automatically upgrade formulae (command-line tools)",
             target: self,
@@ -99,18 +103,9 @@ class SettingsWindowController: NSWindowController {
             action: #selector(toggleAutoUpgradeCasks(_:))
         )
 
-        let caskWarning = NSTextField(
+        let caskWarningRow = noteRow(
-            wrappingLabelWithString: "⚠️ Upgrading a cask can close and replace the app while it is running (e.g. your browser), without warning."
+            "⚠️ Upgrading a cask can close and replace the app while it is running (e.g. your browser), without warning."
         )
-        caskWarning.font = .systemFont(ofSize: NSFont.smallSystemFontSize)
-        caskWarning.textColor = .secondaryLabelColor
-        caskWarning.preferredMaxLayoutWidth = 320
-
-        // indent the note so it reads as belonging to the checkbox above
-        let spacer = NSView()
-        spacer.widthAnchor.constraint(equalToConstant: 18).isActive = true
-        let caskWarningRow = NSStackView(views: [spacer, caskWarning])
-        caskWarningRow.orientation = .horizontal
 
         notifyCheckbox = NSButton(
             checkboxWithTitle: "Notify when new updates are found",
@@ -134,6 +129,7 @@ class SettingsWindowController: NSWindowController {
             frequencyRow,
             customRow,
             greedyCheckbox,
+            greedyNote,
             separator(),
             autoUpgradeFormulaeCheckbox,
             autoUpgradeCasksCheckbox,
@@ -191,6 +187,22 @@ class SettingsWindowController: NSWindowController {
         return box
     }
 
+    /// Small gray explanatory text, indented to read as belonging to the
+    /// checkbox above it.
+    func noteRow(_ text: String) -> NSStackView {
+        let label = NSTextField(wrappingLabelWithString: text)
+        label.font = .systemFont(ofSize: NSFont.smallSystemFontSize)
+        label.textColor = .secondaryLabelColor
+        label.preferredMaxLayoutWidth = 320
+
+        let spacer = NSView()
+        spacer.widthAnchor.constraint(equalToConstant: 18).isActive = true
+
+        let row = NSStackView(views: [spacer, label])
+        row.orientation = .horizontal
+        return row
+    }
+
     // MARK: - Actions
 
     @objc func presetPicked(_ sender: NSPopUpButton) {