Add badges, checkins, and transport endpoints

Introduce gamification and check-in support plus expanded transport/admin APIs. Added DDL for checkins, badges and user_badges. New repositories: badgeRepository, userBadgeRepository, checkinRepository. New routes: admin badge management, admin transport (lines/platforms/stations), public transport endpoints, user checkins and stations endpoints, and user badges on /me. Services updated: adminService (badge CRUD & user assignment), userService (checkins, badge queries), authService (hasAdminRights). Minor package.json name update. These changes implement database, repo, service and route wiring for badges, user_badins and checkin features and additional transport admin routes.

repositories/badgeRepository.js

@@ -0,0 +1,63 @@
+const { pool } = require("../modules/database")
+const { DefaultError } = require("../errors/errors")
+
+async function createBadge(name, description, icon, condition) {
+    try {
+        const sql = "INSERT INTO `badges` (name, description, icon, condition) VALUES (?, ?, ?, ?)"
+        const rows = await pool.query(sql, [name, description, icon, condition])
+        return rows.insertId
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function findAllBadges() {
+    try {
+        const sql = "SELECT * FROM `badges` ORDER BY name"
+        const rows = await pool.query(sql)
+        return rows
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function findBadgeById(badgeId) {
+    try {
+        const sql = "SELECT * FROM `badges` WHERE id = ?"
+        const rows = await pool.query(sql, [badgeId])
+        return rows[0] || null
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function updateBadge(badgeId, updateData) {
+    try {
+        const fields = Object.keys(updateData)
+        const values = Object.values(updateData)
+        const setClause = fields.map(f => `${f} = ?`).join(", ")
+        const sql = `UPDATE \`badges\` SET ${setClause} WHERE id = ?`
+        const rows = await pool.query(sql, [...values, badgeId])
+        return rows.affectedRows > 0
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+async function deleteBadge(badgeId) {
+    try {
+        const sql = "DELETE FROM `badges` WHERE id = ?"
+        const rows = await pool.query(sql, [badgeId])
+        return rows.affectedRows > 0
+    } catch (error) {
+        throw new DefaultError(500, "Internal Server Error", error)
+    }
+}
+
+module.exports = {
+    createBadge,
+    findAllBadges,
+    findBadgeById,
+    updateBadge,
+    deleteBadge
+}