feat(editor): paste and drop images into Markdown files (#489)

Pasting or dropping an image into a Markdown editor saves it beside the document in `assets/` and inserts a URL-encoded relative link as one undo step, in local and remote projects. Existing names get numbered suffixes; the folder and clipboard name pattern are in Settings › Editor › General. Non-Markdown editors, text paste and other dropped files keep their behavior.

Fixes #308

src-tauri/src/commands/fs.rs

@@ -19,6 +19,12 @@ pub fn fs_create_file(window: Window, state: State<'_, AppState>, path: PathBuf)
     fs::create_file(&state.host, window.label(), path)
 }
 
+#[tauri::command]
+#[specta::specta]
+pub async fn fs_create_file_bytes(state: State<'_, AppState>, path: PathBuf, data: Vec<u8>) -> IdeResult<()> {
+    fs::create_file_bytes(&state.host, path, data).await
+}
+
 #[tauri::command]
 #[specta::specta]
 pub fn fs_create_dir(path: PathBuf) -> IdeResult<()> {

src-tauri/src/commands/mod.rs

@@ -126,6 +126,7 @@ pub fn builder() -> tauri_specta::Builder<tauri::Wry> {
         bytes::fs_read_range,
         bytes::fs_read_image,
         fs::fs_create_file,
+        fs::fs_create_file_bytes,
         fs::fs_create_dir,
         fs::fs_rename,
         fs::fs_set_writable,