feat: add admin links management and updaterup page

- Implemented AdminLinksPage for managing link entries with admin role check.
- Created API routes for fetching, updating, and deleting link entries.
- Added ProductTabs component for navigation between Backerup and Updaterup.
- Developed UpdaterupPage with detailed features, setup instructions, and statistics.
- Introduced links database functionality for runtime-editable link overrides.

frontend/lib/db.ts

@@ -65,6 +65,12 @@ async function applyMigrations(db: Client): Promise<void> {
       role           TEXT NOT NULL DEFAULT 'user',
       created_at     TEXT NOT NULL
     );
+
+    CREATE TABLE IF NOT EXISTS links (
+      key        TEXT PRIMARY KEY,
+      value      TEXT NOT NULL,
+      updated_at TEXT NOT NULL DEFAULT (datetime('now'))
+    );
   `)
 }
 

frontend/lib/links-db.ts

@@ -0,0 +1,78 @@
+/**
+ * Runtime-editable link overrides stored in SQLite.
+ * Falls back to the static LINKS defaults for any key without an override.
+ */
+import { getDb, ensureReady } from './db'
+import { LINKS } from './links'
+
+export type LinkKey = keyof typeof LINKS
+
+/** Human-readable labels for each link key (used in the admin UI). */
+export const LINK_META: Record<LinkKey, { label: string; description: string; group: string }> = {
+  gitea:              { label: 'Backerup — Gitea repo',      description: 'Repository root used in nav, footer, and CTA buttons',         group: 'Backerup' },
+  giteaReleases:      { label: 'Backerup — Releases',        description: 'Releases / changelog page',                                     group: 'Backerup' },
+  giteaIssues:        { label: 'Backerup — Issues',          description: 'Issue tracker',                                                  group: 'Backerup' },
+  giteaDiscussions:   { label: 'Backerup — Discussions',     description: 'Gitea Discussions forum',                                        group: 'Backerup' },
+  giteaContributing:  { label: 'Backerup — Contributing',    description: 'CONTRIBUTING.md guide',                                         group: 'Backerup' },
+  docs:               { label: 'Backerup — Docs',            description: 'Primary documentation URL',                                      group: 'Backerup' },
+  dockerImage:        { label: 'Backerup — Docker image',    description: 'Full image reference shown in install snippets',                 group: 'Backerup' },
+  uiPort:             { label: 'Backerup — UI port',         description: 'Default port the Backerup container exposes',                    group: 'Backerup' },
+  updaterupGitea:     { label: 'Updaterup — Gitea repo',     description: 'Repository root used in Updaterup pages',                       group: 'Updaterup' },
+  updaterupDockerImage: { label: 'Updaterup — Docker image', description: 'Full image reference shown in Updaterup install snippets',       group: 'Updaterup' },
+}
+
+export interface LinkEntry {
+  key: LinkKey
+  label: string
+  description: string
+  group: string
+  defaultValue: string
+  override: string | null
+  currentValue: string
+}
+
+/** Returns merged links: DB overrides take precedence over static defaults. */
+export async function getLinks(): Promise<typeof LINKS> {
+  await ensureReady()
+  const { rows } = await getDb().execute('SELECT key, value FROM links')
+  const overrides: Partial<Record<string, string>> = {}
+  for (const row of rows) {
+    overrides[row.key as string] = row.value as string
+  }
+  return { ...LINKS, ...overrides } as typeof LINKS
+}
+
+/** Returns all link entries with defaults, overrides, and current values — for the admin UI. */
+export async function getAllLinkEntries(): Promise<LinkEntry[]> {
+  await ensureReady()
+  const { rows } = await getDb().execute('SELECT key, value FROM links')
+  const overrides: Partial<Record<string, string>> = {}
+  for (const row of rows) {
+    overrides[row.key as string] = row.value as string
+  }
+
+  return (Object.keys(LINK_META) as LinkKey[]).map((key) => ({
+    key,
+    ...LINK_META[key],
+    defaultValue: LINKS[key],
+    override: overrides[key] ?? null,
+    currentValue: overrides[key] ?? LINKS[key],
+  }))
+}
+
+/** Upserts a link override. Pass the static default to effectively reset it, or use resetLink(). */
+export async function setLink(key: LinkKey, value: string): Promise<void> {
+  await ensureReady()
+  await getDb().execute({
+    sql: `INSERT INTO links (key, value, updated_at)
+          VALUES (?, ?, datetime('now'))
+          ON CONFLICT(key) DO UPDATE SET value = excluded.value, updated_at = excluded.updated_at`,
+    args: [key, value],
+  })
+}
+
+/** Removes the DB override for a key, restoring the static default. */
+export async function resetLink(key: LinkKey): Promise<void> {
+  await ensureReady()
+  await getDb().execute({ sql: 'DELETE FROM links WHERE key = ?', args: [key] })
+}

frontend/lib/links.ts

@@ -26,6 +26,12 @@ export const LINKS = {
   dockerImage:        "gitea.doomlabs.de/kptltd00m/backerup:latest",
   /** Default UI port the container exposes */
   uiPort:             "8080",
+
+  // ── Updaterup ─────────────────────────────────────────────
+  /** Updaterup repository root */
+  updaterupGitea:     "https://gitea.doomlabs.de/KptltD00M/updaterup",
+  /** Updaterup Docker image reference */
+  updaterupDockerImage: "gitea.doomlabs.de/kptltd00m/updaterup:latest",
 } as const;
 
 export type Links = typeof LINKS;