feat(ipad): first successful ipad build

Signed-off-by: Sienna Meridian Satterwhite <sienna@r3t.io>

crates/libmarathon/src/platform/mod.rs

@@ -4,6 +4,11 @@
 //! - **input**: Abstract input events (keyboard, mouse, touch, gestures)
 //! - **desktop**: Concrete winit-based implementation for desktop platforms
 //! - **ios**: Concrete UIKit-based implementation for iOS
+//!
+//! The `run_executor()` function is the main entry point and automatically
+//! selects the correct platform-specific executor based on compilation target.
+
+use std::path::PathBuf;
 
 pub mod input;
 
@@ -12,3 +17,57 @@ pub mod ios;
 
 #[cfg(not(target_os = "ios"))]
 pub mod desktop;
+
+// Re-export the appropriate executor based on target platform
+#[cfg(target_os = "ios")]
+pub use ios::run_executor;
+
+#[cfg(not(target_os = "ios"))]
+pub use desktop::run_executor;
+
+/// Sanitize app name for safe filesystem usage
+///
+/// Removes whitespace and converts to lowercase.
+/// Example: "My App" -> "myapp"
+pub fn sanitize_app_name(app_name: &str) -> String {
+    app_name.replace(char::is_whitespace, "").to_lowercase()
+}
+
+/// Get the database filename for an application
+///
+/// Returns sanitized app name with .db extension.
+/// Example: "My App" -> "myapp.db"
+pub fn get_database_filename(app_name: &str) -> String {
+    format!("{}.db", sanitize_app_name(app_name))
+}
+
+/// Get the full database path for an application
+///
+/// Combines platform-appropriate directory with sanitized database filename.
+/// Example on iOS: "/path/to/Documents/myapp.db"
+/// Example on desktop: "./myapp.db"
+pub fn get_database_path(app_name: &str) -> PathBuf {
+    get_data_directory().join(get_database_filename(app_name))
+}
+
+/// Get the platform-appropriate data directory
+///
+/// - iOS: Returns the app's Documents directory (via dirs crate)
+/// - Desktop: Returns the current directory
+pub fn get_data_directory() -> PathBuf {
+    #[cfg(target_os = "ios")]
+    {
+        // Use dirs crate for proper iOS document directory access
+        if let Some(doc_dir) = dirs::document_dir() {
+            doc_dir
+        } else {
+            tracing::warn!("Failed to get iOS document directory, using current directory");
+            PathBuf::from(".")
+        }
+    }
+
+    #[cfg(not(target_os = "ios"))]
+    {
+        PathBuf::from(".")
+    }
+}