Add screen recording, crop, and a Cap-style result window

Recording: Ctrl+Shift+Cmd+R (or the menu) opens the same selection
flow — a marquee records that region, clicking a window records it
(following moves). Video is H.264 .mov at 60fps via SCStream ->
AVAssetWriter with the cursor included, auto-saved to ~/Movies and
revealed in Finder on stop. A red border and a floating timer/stop bar
show during recording, both excluded from the video. Audio is wired
behind a flag for later.

The result window gains a Crop button (crop to the selection;
annotations translate and stay editable) and is restyled after Cap:
sliding-pill Screenshot/Text switcher, capsule buttons in Cap blue,
circular icon buttons, and the content on a rounded card — light and
dark.

Generated with OpenCode

Assisted-by: Kimi:k3

Sources/Kapture/HotkeyManager.swift

@@ -8,6 +8,8 @@ final class HotkeyManager {
     var onTrigger: (() -> Void)?
     /// ⌃⇧⌘S — frozen capture (snapshot at hotkey press).
     var onFrozenTrigger: (() -> Void)?
+    /// ⌃⇧⌘R — screen recording (region or window); toggles stop.
+    var onRecordTrigger: (() -> Void)?
 
     private var hotKeyRefs: [EventHotKeyRef?] = []
     private var eventHandlerRef: EventHandlerRef?
@@ -36,6 +38,7 @@ final class HotkeyManager {
                 switch hotKeyID.id {
                 case 1: HotkeyManager.shared.onTrigger?()
                 case 2: HotkeyManager.shared.onFrozenTrigger?()
+                case 3: HotkeyManager.shared.onRecordTrigger?()
                 default: break
                 }
             }
@@ -44,6 +47,7 @@ final class HotkeyManager {
 
         registerHotkey(id: 1, keyCode: UInt32(kVK_ANSI_S), modifiers: UInt32(cmdKey | shiftKey))
         registerHotkey(id: 2, keyCode: UInt32(kVK_ANSI_S), modifiers: UInt32(cmdKey | shiftKey | controlKey))
+        registerHotkey(id: 3, keyCode: UInt32(kVK_ANSI_R), modifiers: UInt32(cmdKey | shiftKey | controlKey))
     }
 
     private func registerHotkey(id: UInt32, keyCode: UInt32, modifiers: UInt32) {