Allow referencing other apps (#692)

- [x] Update chat_stream_handlers
- [x] Update token handlers
- [x] Update HomeChatInput
- [x] update lexical chat input: do not allow referencing same app
(current app, or other already selected apps)
- [x] I don't think smart context will work on this...
- [x] Enter doesn't clear...

e2e-tests/helpers/test_helper.ts

@@ -645,7 +645,9 @@ export class PageObject {
   }
 
   getChatInput() {
-    return this.page.getByRole("textbox", { name: "Ask Dyad to build..." });
+    return this.page.locator(
+      '[data-lexical-editor="true"][aria-placeholder="Ask Dyad to build..."]',
+    );
   }
 
   clickNewChat({ index = 0 }: { index?: number } = {}) {
@@ -878,6 +880,7 @@ export class PageObject {
 
   async goToAppsTab() {
     await this.page.getByRole("link", { name: "Apps" }).click();
+    await expect(this.page.getByText("Build your dream app")).toBeVisible();
   }
 
   async goToChatTab() {