feat: add homepage components and API for settings and spielplan options

- Introduced new Vue components for homepage teasers: HomeLinksTeaser, HomeSpielplanTeamWidget, HomeTrainingTeaser, and HomeVereinsmeisterschaftenTeaser.
- Created XML layout for tablet app window dump.
- Implemented API endpoints for fetching and updating homepage settings.
- Added API for retrieving spielplan options, including team extraction logic.

server/api/homepage/settings.put.js

@@ -0,0 +1,81 @@
+import { getUserFromToken, readUsers, writeUsers } from '../../utils/auth.js'
+
+function normalizeConfig(config) {
+  if (!config || typeof config !== 'object') return undefined
+  const normalized = {
+    season: config.season ? String(config.season) : undefined,
+    teamName: config.teamName ? String(config.teamName) : undefined,
+    teamAgeGroup: config.teamAgeGroup ? String(config.teamAgeGroup) : undefined
+  }
+  if (!normalized.season && !normalized.teamName && !normalized.teamAgeGroup) {
+    return undefined
+  }
+  return normalized
+}
+
+function normalizeSections(sections) {
+  if (!Array.isArray(sections)) return []
+  const seenKeys = new Set()
+  return sections
+    .filter(section => section?.id)
+    .map((section, index) => ({
+      key: section.key ? String(section.key) : `${String(section.id)}-${index}`,
+      id: String(section.id),
+      enabled: section.enabled !== false,
+      config: normalizeConfig(section.config)
+    }))
+    .filter(section => {
+      if (seenKeys.has(section.key)) return false
+      seenKeys.add(section.key)
+      return true
+    })
+}
+
+export default defineEventHandler(async (event) => {
+  const body = await readBody(event)
+  const sections = normalizeSections(body?.sections)
+  const token = getCookie(event, 'auth_token') || getHeader(event, 'authorization')?.replace(/^Bearer\s+/i, '')
+  const authUser = token ? await getUserFromToken(token) : null
+
+  if (!authUser) {
+
+    setCookie(event, 'homepage_sections', JSON.stringify(sections), {
+      path: '/',
+      sameSite: 'lax',
+      secure: process.env.NODE_ENV === 'production',
+      httpOnly: false,
+      maxAge: 60 * 60 * 24 * 180
+    })
+
+    return {
+      success: true,
+      storage: 'cookie',
+      sections
+    }
+  }
+
+  const users = await readUsers()
+  const userIndex = users.findIndex(user => user.id === authUser.id)
+  if (userIndex < 0) {
+    throw createError({
+      statusCode: 404,
+      message: 'Benutzer nicht gefunden.'
+    })
+  }
+
+  const current = users[userIndex]
+  users[userIndex] = {
+    ...current,
+    homepageSettings: {
+      sections,
+      updatedAt: new Date().toISOString()
+    }
+  }
+  await writeUsers(users)
+
+  return {
+    success: true,
+    storage: 'user',
+    sections
+  }
+})