feat: initial release v0.1.0

- Custom Keyboard Extension with push-to-talk UI
- iOS 26 SpeechAnalyzer + DictationTranscriber (iOS 18 SF fallback)
- OpenAI-compatible LLM client (4 built-in providers + custom)
- 3-page onboarding flow + provider config UI
- App Group shared storage for cross-process config
- 8s LLM timeout with raw-transcript fallback
- App Store privacy manifests for both targets
- SwiftLint + XcodeGen + GitHub Actions CI
- Unit tests (4/4 passing)

OpenLessShared/Services/AppGroupStore.swift

@@ -0,0 +1,45 @@
+// AppGroupStore.swift
+// OSGKeyboard · Shared
+//
+// Convenience wrapper around App Group UserDefaults for non-Published reads.
+// Used by the keyboard extension (no SwiftUI) to read config without
+// instantiating an ObservableObject.
+
+import Foundation
+
+public struct AppGroupStore: @unchecked Sendable {
+    public let defaults: UserDefaults
+
+    public init(defaults: UserDefaults = AppGroup.defaults) {
+        self.defaults = defaults
+    }
+
+    public var providerId: String {
+        defaults.string(forKey: "config.providerId") ?? "openai"
+    }
+
+    public var baseURL: String {
+        defaults.string(forKey: "config.baseURL") ?? LLMProvider.provider(id: "openai").defaultBaseURL
+    }
+
+    public var apiKey: String {
+        defaults.string(forKey: "config.apiKey") ?? ""
+    }
+
+    public var model: String {
+        defaults.string(forKey: "config.model") ?? LLMProvider.provider(id: "openai").defaultModel
+    }
+
+    public var systemPrompt: String {
+        defaults.string(forKey: "config.systemPrompt")
+            ?? "You are a voice-input polishing assistant. Rewrite the user's dictation as clean written text. Preserve intent. Add punctuation and structure. Do not invent facts. Output in the same language as the input."
+    }
+
+    public func makeClient() -> LLMClient {
+        OpenAICompatibleClient(
+            baseURL: baseURL,
+            apiKey: apiKey,
+            model: model
+        )
+    }
+}