fix(server): allow plus, at, and valid path characters in readValidDirectory

apps/dokploy/__test__/wss/readValidDirectory.test.ts

@@ -94,4 +94,32 @@ describe("readValidDirectory (path traversal)", () => {
 			),
 		).toBe(true);
 	});
+
+	it("returns true for SvelteKit routes with + prefix and @ symbols", () => {
+		expect(
+			readValidDirectory(
+				`${BASE}/applications/myapp/code/src/routes/+page.svelte`,
+			),
+		).toBe(true);
+		expect(
+			readValidDirectory(
+				`${BASE}/applications/myapp/code/src/routes/+layout.svelte`,
+			),
+		).toBe(true);
+		expect(
+			readValidDirectory(
+				`${BASE}/applications/myapp/code/src/routes/+server.ts`,
+			),
+		).toBe(true);
+		expect(
+			readValidDirectory(
+				`${BASE}/applications/myapp/code/src/routes/+error.svelte`,
+			),
+		).toBe(true);
+		expect(
+			readValidDirectory(
+				`${BASE}/applications/myapp/code/node_modules/@types/node/index.d.ts`,
+			),
+		).toBe(true);
+	});
 });