refactor: convert all static HTML to EJS with cssHash cache-busting, remove stale html files

apps/web/src/routes/dashboard.ts

@@ -60,7 +60,7 @@ function escapeHtmlSSR(str: string): string {
   return str.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;').replace(/"/g,'&quot;');
 }
 
-function html(template: string, data: Record<string, unknown> = {}) {
+export function html(template: string, data: Record<string, unknown> = {}) {
   return new Response(eta.render(template, { ...data, timeAgoSSR, sparklineSSR, latencyChartSSR, escapeHtmlSSR, cssHash }), {
     headers: { "content-type": "text/html; charset=utf-8" },
   });
@@ -82,6 +82,8 @@ async function getAccountId(cookie: any, headers: any): Promise<string | null> {
 const dashDir = resolve(import.meta.dir, "../dashboard");
 
 export const dashboard = new Elysia()
+  .get("/", () => html("landing", {}))
+
   .get("/dashboard/app.js",           () => new Response(Bun.file(`${dashDir}/app.js`),           { headers: { "cache-control": "public, max-age=31536000, immutable" } }))
   .get("/dashboard/app.css",          () => new Response(Bun.file(`${dashDir}/app.css`),          { headers: { "cache-control": "public, max-age=31536000, immutable" } }))
   .get("/dashboard/tailwind.css",     () => new Response(Bun.file(`${dashDir}/tailwind.css`),     { headers: { "cache-control": "public, max-age=31536000, immutable" } }))
@@ -96,7 +98,7 @@ export const dashboard = new Elysia()
       // Invalid/stale key — clear it and show login
       cookie.pingql_key?.remove();
     }
-    return Bun.file(`${dashDir}/index.html`);
+    return html("login", {});
   })
 
   // Logout
@@ -235,5 +237,5 @@ export const dashboard = new Elysia()
   })
 
   // Docs
-  .get("/docs", () => Bun.file(`${dashDir}/docs.html`))
-  .get("/privacy", () => Bun.file(`${dashDir}/privacy.html`));
+  .get("/docs", () => html("docs", {}))
+  .get("/privacy", () => html("privacy", {}));