feat: extend API key auth to all API endpoints

Bearer token authentication now works on all /api/* routes, not just
/api/mcp. If a Bearer token is present it's validated first; otherwise
session cookie auth is used as fallback. Updates settings UI to reflect
the broader scope (tab renamed to "API", REST API curl example added)
and updates the landing page feature card.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/hooks.server.ts

@@ -22,36 +22,31 @@ export const handle: Handle = async ({ event, resolve }) => {
 		return resolve(event);
 	}
 
-	// MCP endpoint: authenticate via Bearer token (API key)
-	if (pathname.startsWith('/api/mcp')) {
+	// API routes: authenticate via Bearer token if present
+	if (pathname.startsWith('/api/')) {
 		const authHeader = event.request.headers.get('authorization');
 		const token = authHeader?.startsWith('Bearer ') ? authHeader.slice(7) : null;
 
-		if (!token) {
-			return new Response(JSON.stringify({ error: 'Unauthorized' }), {
-				status: 401,
-				headers: { 'Content-Type': 'application/json' }
-			});
-		}
+		if (token) {
+			const { valid, userId } = validateApiKey(token);
+			if (!valid || !userId) {
+				return new Response(JSON.stringify({ error: 'Unauthorized' }), {
+					status: 401,
+					headers: { 'Content-Type': 'application/json' }
+				});
+			}
 
-		const { valid, userId } = validateApiKey(token);
-		if (!valid || !userId) {
-			return new Response(JSON.stringify({ error: 'Unauthorized' }), {
-				status: 401,
-				headers: { 'Content-Type': 'application/json' }
-			});
-		}
+			const user = getUserForApiKey(userId);
+			if (!user) {
+				return new Response(JSON.stringify({ error: 'Unauthorized' }), {
+					status: 401,
+					headers: { 'Content-Type': 'application/json' }
+				});
+			}
 
-		const user = getUserForApiKey(userId);
-		if (!user) {
-			return new Response(JSON.stringify({ error: 'Unauthorized' }), {
-				status: 401,
-				headers: { 'Content-Type': 'application/json' }
-			});
+			event.locals.user = user;
+			return resolve(event);
 		}
-
-		event.locals.user = user;
-		return resolve(event);
 	}
 
 	// Check if setup is complete

src/routes/(app)/settings/+layout.svelte

@@ -32,7 +32,7 @@
 						class="flex items-center gap-2 rounded-sm px-3 py-2 text-sm whitespace-nowrap transition-colors {pathname === '/settings/mcp' ? 'bg-[var(--primary)]/15 text-[var(--primary)] font-medium' : 'text-[var(--text)] hover:bg-[var(--bg-base)]'}"
 					>
 						<Cpu size={16} />
-						MCP Server
+						API
 					</a>
 				</li>
 				{#if data.user?.role === 'admin'}

src/routes/(app)/settings/mcp/+page.svelte

@@ -122,7 +122,7 @@ ${mcpJsonConfig}`);
 		<h2 class="text-lg font-semibold text-[var(--text)]">API Keys</h2>
 	</div>
 	<p class="mb-4 text-xs text-[var(--text-muted)]">
-		API keys allow external tools (like Claude Code) to access your notes via the MCP protocol.
+		API keys allow external tools to access your notes via the MCP protocol and the REST API.
 	</p>
 
 	<!-- Create Key Form -->
@@ -229,6 +229,16 @@ ${mcpJsonConfig}`);
 	{/if}
 </section>
 
+<!-- REST API Example -->
+<section class="mb-6 rounded-sm border border-[var(--border-subtle)] bg-[var(--bg-surface)] p-6 shadow-[var(--card-shadow)]">
+	<h2 class="mb-4 text-lg font-semibold text-[var(--text)]">REST API</h2>
+	<p class="mb-3 text-xs text-[var(--text-muted)]">
+		Use your API key to authenticate requests to any <code class="rounded-sm bg-[var(--bg-base)] px-1 py-0.5">/api/*</code> endpoint:
+	</p>
+	<pre class="overflow-x-auto rounded-sm bg-[var(--bg-base)] p-3 text-xs text-[var(--text)]">curl -H "Authorization: Bearer {activeApiKey}" \
+  {baseUrl}/api/notes</pre>
+</section>
+
 <!-- MCP Config Help -->
 <section class="rounded-sm border border-[var(--border-subtle)] bg-[var(--bg-surface)] p-6 shadow-[var(--card-shadow)]">
 	<h2 class="mb-4 text-lg font-semibold text-[var(--text)]">Client Configuration</h2>