Edit in place and add a global All tab

Editing a prompt opened a separate floating window that ignored the
panel's theme; it is now an in-panel modal that matches. A Workspace/All
segmented tab above the list shows every prompt labeled with its
workspace, so the whole library is browsable without typing a search.

Sources/Prompt/PanelController.swift

@@ -16,7 +16,6 @@ final class PanelController: NSObject {
 
     private var panel: KeyablePanel?
     private var pasteMonitor: Any?
-    let editController = EditWindowController()
 
     var isVisible: Bool { panel?.isVisible ?? false }
 
@@ -102,56 +101,4 @@ final class PanelController: NSObject {
     }
 }
 
-@MainActor
-final class EditWindowController: NSObject {
-    private var window: NSWindow?
 
-    func edit(itemID: UUID, text: String) {
-        let view = EditView(
-            text: text,
-            onSave: { [weak self] newText in
-                Store.shared.updateText(itemID, newText: newText)
-                self?.window?.close()
-            },
-            onCancel: { [weak self] in self?.window?.close() }
-        )
-        let window = NSWindow(
-            contentRect: NSRect(x: 0, y: 0, width: 480, height: 320),
-            styleMask: [.titled, .closable, .resizable],
-            backing: .buffered,
-            defer: false
-        )
-        window.title = "Edit Note"
-        window.contentView = NSHostingView(rootView: view)
-        window.isReleasedWhenClosed = false
-        window.center()
-        window.makeKeyAndOrderFront(nil)
-        NSApp.activate(ignoringOtherApps: true)
-        self.window = window
-    }
-}
-
-private struct EditView: View {
-    @State var text: String
-    var onSave: (String) -> Void
-    var onCancel: () -> Void
-
-    var body: some View {
-        VStack(spacing: 12) {
-            TextEditor(text: $text)
-                .font(.body)
-                .padding(4)
-                .background(Color.primary.opacity(0.05))
-                .cornerRadius(6)
-            HStack {
-                Spacer()
-                Button("Cancel", action: onCancel)
-                    .keyboardShortcut(.cancelAction)
-                Button("Save") { onSave(text) }
-                    .keyboardShortcut(.defaultAction)
-                    .keyboardShortcut("s", modifiers: .command)
-            }
-        }
-        .padding(16)
-    }
-}