refactor: Remove unnecessary async/await from command handlers

- Convert async command handlers to synchronous functions returning promises directly
- Eliminates 'async arrow function has no await expression' linting errors
- Maintains VS Code command handler compatibility (accepts Promise<void> or void)
- Keep async/await for generateCommitMessage due to withProgress complexity

Author: Hi7cl4w

src/extension.ts

@@ -10,8 +10,8 @@ export function activate(context: vscode.ExtensionContext) {
   app.init();
 
   context.subscriptions.push(
-    vscode.commands.registerCommand("diffy-explain-ai.explainDiffClipboard", async () => {
-      await app?.explainDiffToClipboard();
+    vscode.commands.registerCommand("diffy-explain-ai.explainDiffClipboard", () => {
+      return app?.explainDiffToClipboard();
     }),
   );
 
@@ -38,14 +38,14 @@ export function activate(context: vscode.ExtensionContext) {
   );
 
   context.subscriptions.push(
-    vscode.commands.registerCommand("diffy-explain-ai.generateCommitMessageClipboard", async () => {
-      await app?.generateCommitMessageToClipboard();
+    vscode.commands.registerCommand("diffy-explain-ai.generateCommitMessageClipboard", () => {
+      return app?.generateCommitMessageToClipboard();
     }),
   );
 
   context.subscriptions.push(
-    vscode.commands.registerCommand("diffy-explain-ai.explainAndPreview", async () => {
-      await app?.explainAndPreview();
+    vscode.commands.registerCommand("diffy-explain-ai.explainAndPreview", () => {
+      return app?.explainAndPreview();
     }),
   );
 }