feat: Notitie editor in the app, dictation routed to system or editor

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

Sources/SstCore/AppGlue.swift

@@ -1,18 +1,33 @@
 import Foundation
 
-/// Inserts text only while `shouldInsert()` says so (not when Sst itself is in front, nor for window recordings).
-public struct GatedInserter: TextInserting {
-    private let inner: TextInserting
-    private let shouldInsert: () -> Bool
+/// Where one dictation's text goes.
+public enum InsertionRoute: Equatable, Sendable {
+    /// Pasted into whichever app is in front.
+    case system
+    /// Typed into the Notitie editor inside Sst.
+    case editor
+    /// Dropped (Sst is in front but nothing there takes text, or the recording started in the window).
+    case none
+}
 
-    public init(inner: TextInserting, shouldInsert: @escaping () -> Bool) {
-        self.inner = inner
-        self.shouldInsert = shouldInsert
+/// Sends each dictation to the system paster or the in-app editor, asked at insertion time rather than at creation.
+public struct RoutingInserter: TextInserting {
+    private let system: TextInserting
+    private let editor: TextInserting
+    private let route: () -> InsertionRoute
+
+    public init(system: TextInserting, editor: TextInserting, route: @escaping () -> InsertionRoute) {
+        self.system = system
+        self.editor = editor
+        self.route = route
     }
 
     public func insert(_ text: String) async throws {
-        guard shouldInsert() else { return }
-        try await inner.insert(text)
+        switch route() {
+        case .system: try await system.insert(text)
+        case .editor: try await editor.insert(text)
+        case .none: break
+        }
     }
 }