fix(seo): serve the root request through the web app handler

The static middleware was mounted ahead of the web app fallback, and Hono's
serveStatic resolves "/" to the directory and returns dist/index.html verbatim.
handleWebApp never ran for the root route, so the OpenGraph, Twitter, canonical
and JSON-LD markup it injects was missing in production - fetching
https://rxresu.me/ as Twitterbot returned zero og: tags.

Route "/" explicitly before the static middleware so the injection runs.

apps/server/src/http/app.test.ts

@@ -192,4 +192,16 @@ describe("createApp", () => {
 		expect(mocks.serveWebDistStatic).not.toHaveBeenCalled();
 		expect(mocks.handleWebApp).not.toHaveBeenCalled();
 	});
+
+	it.each(["GET", "HEAD"])("routes %s / to the web app handler so SEO markup is injected", async (method) => {
+		const { createApp } = await import("./app");
+		const app = createApp();
+		const request = new Request("http://localhost:3001/", { method });
+
+		const response = await app.fetch(request);
+
+		expect(response.status).toBe(200);
+		expect(mocks.handleWebApp).toHaveBeenCalledWith(request);
+		expect(mocks.serveWebDistStatic).not.toHaveBeenCalled();
+	});
 });

apps/server/src/http/app.ts

@@ -65,6 +65,9 @@ export function createApp() {
 	app.on(["GET", "HEAD"], "/sitemap.xml", (c) => handleSitemap({ head: c.req.method === "HEAD" }));
 	app.on(["GET", "HEAD"], "/llms.txt", (c) => handleLlms({ head: c.req.method === "HEAD" }));
 
+	// Must precede the static middleware: serveStatic resolves "/" to dist/index.html and would
+	// return it verbatim, skipping the OpenGraph/Twitter/canonical/JSON-LD injection in handleWebApp.
+	app.on(["GET", "HEAD"], "/", (c) => handleWebApp(c.req.raw));
 	app.use("/*", serveWebDistStatic);
 	app.on(["GET", "HEAD"], "/*", (c) => handleWebApp(c.req.raw));