feat: Implement app versioning and update gitignore

- Adds appVersion and buildNumber to AppConfig.swift for centralized version management.
- Updates scryfallUserAgent to use the dynamic appVersion.
- Updates .gitignore to exclude AI asset and training directories.
- Adds a version check step to the README release checklist.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -27,3 +27,10 @@ env/
 
 # Mac-specific
 .DS_Store
+
+# AI-generated assets
+Raw_Assets/
+Ready_Assets/
+
+# ML Training Data
+IYmtg_Training/

IYmtg_App_iOS/AppConfig.swift

@@ -26,6 +26,10 @@ struct AppConfig {
     // 2. IN-APP PURCHASE ID (Use a "Consumable" type in App Store Connect for repeatable tips)
     static let tipJarProductIDs: [String] = [] // Example: Use your real Product ID
 
+    // 3. VERSIONING
+    static let appVersion = "1.0.0" // Follows Semantic Versioning (Major.Minor.Patch)
+    static let buildNumber = "1"      // Increments with each build submitted to App Store Connect
+    
     // Feature Flags
     static let enableFoilDetection = true
     static let enableConditionGrading = true
@@ -53,7 +57,7 @@ struct AppConfig {
     }
     
     static var scryfallUserAgent: String {
-        return "IYmtg/1.0 (\(contactEmail))"
+        return "IYmtg/\(appVersion) (\(contactEmail))"
     }
     
     static func validate() {

README.md

@@ -302,6 +302,7 @@ Perform these steps before submitting to the App Store.
     *   [ ] Verify `contactEmail` is valid.
     *   [ ] Verify `tipJarProductIDs` match App Store Connect.
     *   [ ] Ensure `enableFoilDetection` and other flags are `true`.
+    *   [ ] Update `appVersion` (Semantic Versioning: Major.Minor.Patch) and `buildNumber` for this release.
 2.  **iCloud / CloudKit:**
     *   [ ] Signing & Capabilities → iCloud → CloudKit enabled.
     *   [ ] CloudKit container added: `iCloud.<bundle-id>`.