Refactor database interactions and update footer text

- Removed community sharing and self-hosted features from the features list in page.tsx.
- Updated footer text in layout.tsx to remove the MIT License mention.
- Added @libsql/client dependency to package.json and bun.lock for database management.
- Implemented a new db.ts file to handle SQLite database connections and migrations.
- Refactored user and file management functions in users.ts and store.ts to utilize the new database client.
- Ensured legacy JSON data is imported into the new SQLite database structure on first run.

frontend/app/page.tsx

@@ -101,24 +101,6 @@ const features = [
     title: "Scheduled backups",
     body: "Define cron-based backup jobs per container with configurable retention: keep latest N, keep every N-th, or purge older than N days.",
   },
-  {
-    icon: <ShareIcon />,
-    gradient: "from-pink-500/15 to-rose-600/15",
-    border: "border-pink-500/20",
-    iconBg: "bg-pink-500/10",
-    iconColor: "text-pink-400",
-    title: "Community sharing",
-    body: "Publish your container configs so others can spin up the same setup in seconds. Browse configs shared by the community right here.",
-  },
-  {
-    icon: <ShieldIcon />,
-    gradient: "from-slate-400/10 to-slate-500/10",
-    border: "border-slate-600/30",
-    iconBg: "bg-slate-500/10",
-    iconColor: "text-slate-300",
-    title: "Self-hosted & private",
-    body: "Runs entirely inside your Docker environment. No cloud dependencies, no data leaves your server unless you choose to share.",
-  },
 ];
 
 const steps = [
@@ -153,16 +135,16 @@ const steps = [
 ];
 
 const pills = [
-  { label: "MIT Licensed", color: "text-emerald-400 bg-emerald-500/10 border-emerald-500/20" },
+  { label: "Open source", color: "text-emerald-400 bg-emerald-500/10 border-emerald-500/20" },
   { label: "Zero cloud deps", color: "text-cyan-400 bg-cyan-500/10 border-cyan-500/20" },
   { label: "Self-hosted", color: "text-violet-400 bg-violet-500/10 border-violet-500/20" },
   { label: "Docker native", color: "text-blue-400 bg-blue-500/10 border-blue-500/20" },
 ];
 
 const stats = [
-  { num: 100, suffix: "%", label: "Open source", sub: "MIT licensed" },
+  { num: 100, suffix: "%", label: "Open source", sub: "source available" },
   { num: 500, suffix: " MB", label: "Max file size", sub: "per upload" },
-  { num: 6, suffix: "+", label: "Backup strategies", sub: "fully configurable" },
+  { num: 4, suffix: "", label: "Backup strategies", sub: "fully configurable" },
   { num: 0, suffix: "", label: "Cloud dependencies", sub: "runs on your infra" },
 ];