feat(branding): implement dynamic branding in service worker and reports (#383)

* feat(branding): implement dynamic branding in service worker and reports

* refactor(service-worker): remove push notification handling code

* feat(service-worker): implement dynamic branding in service worker and related scripts

scripts/inject-public-branding.mjs

@@ -0,0 +1,33 @@
+#!/usr/bin/env node
+/**
+ * Stamps public/sw.js from public/sw.template.js with the runtime brand name.
+ *
+ * The service worker is served as a static file (Next.js does not bundle
+ * public/), so NEXT_PUBLIC_* inlining doesn't reach it. We generate sw.js
+ * from a template at build time (Vercel/local) so the deployed file shows
+ * the configured brand name.
+ *
+ * Docker uses a different strategy: the builder stage exports
+ * NEXT_PUBLIC_BRANDING_APP_NAME=__NEXT_PUBLIC_BRANDING_APP_NAME__ so the
+ * placeholder survives the build, and docker-entrypoint.sh substitutes the
+ * runtime value via sed at container start.
+ *
+ * public/sw.js is gitignored — the source of truth is the template.
+ */
+import { readFileSync, writeFileSync, existsSync } from 'node:fs'
+import { join } from 'node:path'
+
+const TEMPLATE_PATH = join(process.cwd(), 'public', 'sw.template.js')
+const OUTPUT_PATH = join(process.cwd(), 'public', 'sw.js')
+const PLACEHOLDER = '__NEXT_PUBLIC_BRANDING_APP_NAME__'
+const value = process.env.NEXT_PUBLIC_BRANDING_APP_NAME || 'Gnubok'
+
+if (!existsSync(TEMPLATE_PATH)) {
+  console.log(`[inject-public-branding] ${TEMPLATE_PATH} not found, skipping`)
+  process.exit(0)
+}
+
+const template = readFileSync(TEMPLATE_PATH, 'utf8')
+const output = template.split(PLACEHOLDER).join(value)
+writeFileSync(OUTPUT_PATH, output)
+console.log(`[inject-public-branding] generated public/sw.js with brand "${value}"`)