fix: detect @angular/platform-server to determine if Angular project uses SSR

Previously, Angular's discover() always returned mayWantBackend: true,
causing the SSR warning to appear even for SPA-only Angular projects.
Now checks for the presence of @angular/platform-server in installed dependencies.

Resolves #10362

Author: swseverance

src/frameworks/angular/index.spec.ts

@@ -2,6 +2,7 @@ import { expect } from "chai";
 import * as sinon from "sinon";
 import * as fsExtra from "fs-extra";
 
+import * as frameworkUtils from "../utils";
 import { discover } from ".";
 
 describe("Angular", () => {
@@ -17,12 +18,27 @@ describe("Angular", () => {
       sandbox.restore();
     });
 
-    it("should find an Angular app", async () => {
+    it("should find an Angular app with SSR", async () => {
       sandbox.stub(fsExtra, "pathExists").resolves(true);
+      sandbox.stub(frameworkUtils, "findDependency").callsFake((name) => {
+        if (name === "@angular/platform-server") {
+          return { version: "17.0.0", resolved: "", overridden: false };
+        }
+        return undefined;
+      });
       expect(await discover(cwd)).to.deep.equal({
         mayWantBackend: true,
         version: undefined,
       });
     });
+
+    it("should find an Angular app without SSR", async () => {
+      sandbox.stub(fsExtra, "pathExists").resolves(true);
+      sandbox.stub(frameworkUtils, "findDependency").returns(undefined);
+      expect(await discover(cwd)).to.deep.equal({
+        mayWantBackend: false,
+        version: undefined,
+      });
+    });
   });
 });

src/frameworks/angular/index.ts

@@ -42,7 +42,12 @@ export async function discover(dir: string): Promise<Discovery | undefined> {
   if (!(await pathExists(join(dir, "package.json")))) return;
   if (!(await pathExists(join(dir, "angular.json")))) return;
   const version = getAngularVersion(dir);
-  return { mayWantBackend: true, version };
+  const mayWantBackend = !!findDependency("@angular/platform-server", {
+    cwd: dir,
+    depth: 0,
+    omitDev: false,
+  });
+  return { mayWantBackend, version };
 }
 
 export function init(setup: any, config: any) {