chore: adopt source-available license and strengthen privacy disclosures

Replace MIT with a restrictive source-available license and align README/docs copy. Add cloud polish acknowledgment, privacy manifest updates, voice history disclosure, export compliance metadata, and support links for App Store readiness.

OSGKeyboardExt/Services/HostAppLauncher.swift

@@ -1,10 +1,9 @@
 // HostAppLauncher.swift
 // OSGKeyboard · Keyboard Extension
 //
-// Opens the host app via URL using every extension-safe strategy:
+// Opens the host app via URL using extension-safe strategies:
 // 1. `extensionContext.open` (official)
 // 2. Responder-chain `UIApplication.open` (TypeWhisper pattern)
-// 3. `sharedApplication` KVC fallback (common in full-access keyboards)
 
 import UIKit
 
@@ -22,23 +21,12 @@ enum HostAppLauncher {
                         completion(true)
                         return
                     }
-                    completion(openViaFallback(url, from: controller))
+                    completion(openViaResponderChain(url, from: controller))
                 }
             }
             return
         }
-        completion(openViaFallback(url, from: controller))
-    }
-
-    @MainActor
-    private static func openViaFallback(
-        _ url: URL,
-        from controller: KeyboardViewController
-    ) -> Bool {
-        if openViaResponderChain(url, from: controller) {
-            return true
-        }
-        return openViaSharedApplication(url)
+        completion(openViaResponderChain(url, from: controller))
     }
 
     @MainActor
@@ -56,15 +44,4 @@ enum HostAppLauncher {
         }
         return false
     }
-
-    @MainActor
-    private static func openViaSharedApplication(_ url: URL) -> Bool {
-        guard
-            let application = UIApplication.value(forKeyPath: "sharedApplication") as? UIApplication
-        else {
-            return false
-        }
-        application.open(url, options: [:]) { _ in }
-        return true
-    }
 }