fix(router): handle trailing-slash routes in path segment boundary check (#6413)

Author: vimtor

platform/src/components/aws/router.ts

@@ -1537,7 +1537,7 @@ async function handler(event) {
         || (host.includes("*") && new RegExp(host).test(requestHostRegexPattern));
       if (!hostMatches) return;
 
-      const pathMatches = event.request.uri.startsWith(path) && (event.request.uri === path || event.request.uri[path.length] === '/' || path === '/');
+      const pathMatches = event.request.uri.startsWith(path) && (event.request.uri === path || path.endsWith('/') || event.request.uri[path.length] === '/' || path === '/');
       if (!pathMatches) return;
 
       match = {

platform/test/components/router-path-matching.test.ts

@@ -16,6 +16,7 @@ describe("Router path matching", () => {
     return (
       requestUri.startsWith(routePath) &&
       (requestUri === routePath ||
+        routePath.endsWith("/") ||
         requestUri[routePath.length] === "/" ||
         routePath === "/")
     );
@@ -123,6 +124,17 @@ describe("Router path matching", () => {
     });
   });
 
+  describe("trailing-slash routes", () => {
+    it("should match subpaths under trailing-slash route", () => {
+      expect(pathMatches("/public/2025-11/image.jpg", "/public/")).toBe(true);
+      expect(pathMatches("/public/", "/public/")).toBe(true);
+    });
+
+    it("should NOT match non-segment continuations", () => {
+      expect(pathMatches("/publicfile", "/public/")).toBe(false);
+    });
+  });
+
   describe("priority testing (longest match)", () => {
     it("should support longest path matching", () => {
       // When multiple routes could match, the Router picks the longest