feat(storage): complete phase 3 branding foundation

server/branding/runtime.ts

@@ -0,0 +1,33 @@
+import "server-only";
+
+import { getSqliteConnection } from "../db/client";
+import { BrandingService, DEFAULT_BRANDING, buildBrandingTokens, type PublicBranding } from "./service";
+
+export function getBrandingService(): BrandingService {
+  return new BrandingService(getSqliteConnection().db);
+}
+
+export function getPublicBranding(): PublicBranding {
+  try {
+    return getBrandingService().getPublic();
+  } catch (error) {
+    if (isMissingBrandingTable(error)) {
+      return {
+        ...DEFAULT_BRANDING,
+        lightLogoUrl: null,
+        darkLogoUrl: null,
+        iconUrl: null,
+        cssVariables: buildBrandingTokens(
+          DEFAULT_BRANDING.primaryColor,
+          DEFAULT_BRANDING.accentColor,
+          DEFAULT_BRANDING.radiusScale,
+        ),
+      };
+    }
+    throw error;
+  }
+}
+
+function isMissingBrandingTable(error: unknown): boolean {
+  return error instanceof Error && error.message.includes("no such table: instance_branding");
+}