fix: replace provider indicator with expanded picker

Tests/ConjureKitTests/ActionsBackgroundTests.swift

@@ -30,7 +30,7 @@ import Testing
     }
 }
 
-@Test @MainActor func providerPickerOpensBelowAnchorAndKeepsCurrentSelection() throws {
+@Test @MainActor func providerPickerReplacesAnchorDownwardAndKeepsCurrentSelection() throws {
     _ = NSApplication.shared
     let window = NSWindow(contentRect: NSRect(x: 0, y: 0, width: 750, height: 480),
                           styleMask: .borderless, backing: .buffered, defer: false)
@@ -47,17 +47,21 @@ import Testing
     popup.showProviders(selectedOpenAI: true, relativeTo: anchor)
     host.layoutSubtreeIfNeeded()
     let rect = popup.view.convert(popup.view.bounds, to: host)
-    #expect(rect.maxY < pill.frame.minY)
+    #expect(rect.maxY == pill.frame.maxY)
+    #expect(rect.minY < pill.frame.minY)
     #expect(rect.maxX == pill.frame.maxX)
-    #expect(pill.alphaValue == 1)
+    #expect(pill.isAccessibilityHidden())
     _ = popup.handle(#selector(NSResponder.insertNewline(_:)))
     #expect(selections == [true])
     // Reopen during the close animation, then switch modes without retaining the old anchor.
     popup.showTranslation(relativeTo: anchor)
     popup.showProviders(selectedOpenAI: false, relativeTo: anchor)
     host.layoutSubtreeIfNeeded()
-    #expect(popup.view.convert(popup.view.bounds, to: host).maxY < pill.frame.minY)
+    #expect(popup.view.convert(popup.view.bounds, to: host).maxY == pill.frame.maxY)
     popup.moveSelection(by: 1)
     _ = popup.handle(#selector(NSResponder.insertNewline(_:)))
     #expect(selections == [true, true])
+    popup.close(animated: false)
+    #expect(pill.alphaValue == 1)
+    #expect(!pill.isAccessibilityHidden())
 }