Add settings view with theme, categories, export, and backup

outlay-core/src/db.rs

@@ -734,6 +734,21 @@ impl Database {
         Ok(())
     }
 
+    pub fn reset_all_data(&self) -> SqlResult<()> {
+        self.conn.execute_batch(
+            "DELETE FROM transactions;
+             DELETE FROM budgets;
+             DELETE FROM recurring_transactions;
+             DELETE FROM budget_notifications;
+             DELETE FROM categories;
+             DELETE FROM exchange_rate_cache;
+             DELETE FROM settings;"
+        )?;
+        self.seed_default_categories()?;
+        self.set_setting("schema_version", "1")?;
+        Ok(())
+    }
+
     fn seed_default_categories(&self) -> SqlResult<()> {
         let expense_categories = [
             ("Food & Dining",   "\u{1f354}", "#e74c3c"),