feat: add custom banner to status page (#4)

AGENTS.md

@@ -9,6 +9,7 @@ npm workspace: Cloudflare Worker (`src/`) + Astro 6 SSR app (`status-page/`).
 - **Static assets**: `status-page/dist/client/` served via `ASSETS` binding (`run_worker_first = true`)
 - **Shared types**: `src/types.ts` imported via `@worker/types` alias in `status-page/tsconfig.json`
 - **Auth**: `status-page/src/lib/auth.ts`, configured via `STATUS_PUBLIC`, `STATUS_USERNAME`, `STATUS_PASSWORD` env vars
+- **Banner**: Custom banner image via `STATUS_BANNER_URL` and `STATUS_BANNER_LINK` env vars
 
 ## Commands
 
@@ -58,3 +59,18 @@ Before commit: `npm run check && npm run test && npm run build:pages && npm run
 - **Types**: `type` for aliases, `interface` for object shapes. Explicit return types.
 - **Naming**: files `kebab-case.ts`, types `PascalCase`, variables `camelCase`, DB fields `snake_case`.
 - **Tests**: `*.test.ts` colocated with source. Vitest with `vi` for mocks.
+
+## Banner Configuration
+
+Set environment variables in `wrangler.toml` or Cloudflare dashboard:
+
+```toml
+[vars]
+STATUS_BANNER_URL = "https://example.com/banner.png"
+STATUS_BANNER_LINK = "https://example.com"  # optional
+```
+
+- Banner replaces title text when `STATUS_BANNER_URL` is set
+- Title is used as `alt` text for accessibility
+- Link opens in same tab when `STATUS_BANNER_LINK` is set
+- Empty or unset URL falls back to title display

README.md

@@ -57,6 +57,7 @@ __ ,--~'                  ~~----____
   - Response time charts (uPlot) with downtime bands.
   - Basic auth or public access modes.
   - Dark/light mode.
+  - Custom banner image support with optional clickable link.
 
 ## Architecture
 
@@ -135,7 +136,7 @@ settings:
 
 ### Per-Monitor Overrides
 
-Each monitor can override the global default_* settings:
+Each monitor can override the global default\_\* settings:
 
 ```yaml
 - name: 'critical-api'
@@ -271,6 +272,17 @@ wrangler secret put STATUS_PUBLIC  # Set value to "true"
 - If credentials are set: basic auth required
 - Otherwise: 403 Forbidden
 
+**Custom Banner:**
+
+You can add a custom banner image to replace the title text on the status page:
+
+```toml
+# In wrangler.toml
+[vars]
+STATUS_BANNER_URL = "https://example.com/banner.png"
+STATUS_BANNER_LINK = "https://example.com"  # optional
+```
+
 ## Secret Management
 
 Secrets are managed via Cloudflare's secret system. To add a new secret:

src/types.ts

@@ -89,6 +89,8 @@ export type Env = {
   STATUS_PUBLIC?: string;
   REGIONAL_CHECKER_DO?: DurableObjectNamespace;
   ASSETS?: Fetcher;
+  STATUS_BANNER_URL?: string;
+  STATUS_BANNER_LINK?: string;
 };
 
 // Status API response types (consumed by Pages project via service binding)

status-page/src/components/Header.astro

@@ -7,9 +7,13 @@ interface Props {
   };
   lastUpdated: number;
   title: string;
+  banner?: {
+    url?: string;
+    link?: string;
+  };
 }
 
-const { summary, lastUpdated, title } = Astro.props;
+const { summary, lastUpdated, title, banner } = Astro.props;
 
 function formatAbsoluteTime(unixTimestamp: number): string {
   const date = new Date(unixTimestamp * 1000);
@@ -28,7 +32,19 @@ const absoluteTime = formatAbsoluteTime(lastUpdated);
 
 <header class="header">
   <div class="header-top">
-    <h1>{title}</h1>
+    {banner?.url ? (
+      <div class="banner-container">
+        {banner.link ? (
+          <a href={banner.link} class="banner-link" aria-label={title} target="_self">
+            <img src={banner.url} alt={title} class="banner-image" />
+          </a>
+        ) : (
+          <img src={banner.url} alt={title} class="banner-image" />
+        )}
+      </div>
+    ) : (
+      <h1>{title}</h1>
+    )}
     <button class="theme-toggle" aria-label="Toggle theme" title="Toggle light/dark theme">
       <svg class="theme-icon sun" width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2">
         <circle cx="12" cy="12" r="5"/>
@@ -156,6 +172,29 @@ const absoluteTime = formatAbsoluteTime(lastUpdated);
     outline-offset: 2px;
   }
 
+  .banner-container {
+    display: flex;
+    justify-content: center;
+    align-items: center;
+    max-width: 100%;
+  }
+
+  .banner-link {
+    display: block;
+    text-decoration: none;
+    transition: opacity var(--transition-normal);
+  }
+
+  .banner-link:hover {
+    opacity: 0.9;
+  }
+
+  .banner-image {
+    max-height: 60px;
+    max-width: 100%;
+    object-fit: contain;
+  }
+
   .theme-icon {
     transition: opacity var(--transition-normal), transform var(--transition-normal);
   }
@@ -275,6 +314,10 @@ const absoluteTime = formatAbsoluteTime(lastUpdated);
       font-size: var(--text-2xl);
     }
 
+    .banner-image {
+      max-height: 50px;
+    }
+
     .theme-toggle {
       width: 2rem;
       height: 2rem;
@@ -302,6 +345,10 @@ const absoluteTime = formatAbsoluteTime(lastUpdated);
       font-size: var(--text-xl);
     }
 
+    .banner-image {
+      max-height: 40px;
+    }
+
     .summary-counts {
       flex-direction: column;
       align-items: center;

status-page/src/pages/index.astro

@@ -10,6 +10,7 @@ import { env } from 'cloudflare:workers';
 
 let data: Awaited<ReturnType<typeof getStatusApiData>> | null = null;
 let error: Error | null = null;
+let banner: { url: string; link?: string } | undefined = undefined;
 
 try {
   // TypeScript doesn't know about MONITORS_CONFIG in cloudflare:workers env
@@ -21,6 +22,10 @@ try {
   const configYaml = interpolateSecrets(monitorsConfig, envAny);
   const config = parseConfig(configYaml);
   data = await getStatusApiData(env.DB, config);
+
+  const bannerUrl = envAny.STATUS_BANNER_URL;
+  const bannerLink = envAny.STATUS_BANNER_LINK;
+  banner = bannerUrl ? { url: bannerUrl, link: bannerLink } : undefined;
 } catch (err) {
   console.error('Failed to fetch status data:', err);
   error = err as Error;
@@ -55,7 +60,7 @@ const sortedMonitors = data ? [...data.monitors].sort(
       </div>
     ) : (
         <>
-        <Header summary={data!.summary} lastUpdated={data!.lastUpdated} title={data!.title} />
+        <Header summary={data!.summary} lastUpdated={data!.lastUpdated} title={data!.title} banner={banner} />
         <div class="monitors">
           {sortedMonitors.map(monitor => <MonitorCard monitor={monitor} />)}
         </div>