feat: Implement blog and blog post models, routes, and services

- Added Blog and BlogPost models with necessary fields and relationships.
- Created blogRouter for handling blog-related API endpoints including CRUD operations.
- Developed BlogService for business logic related to blogs and posts, including sharing functionality.
- Implemented API client methods for frontend to interact with blog-related endpoints.
- Added internationalization support for blog-related text in English and German.
- Created Vue components for blog editing, listing, and viewing, including a rich text editor for post content.
- Enhanced user experience with form validations and dynamic visibility settings based on user input.

frontend/src/router/blogRoutes.js

@@ -0,0 +1,13 @@
+import BlogListView from '@/views/blog/BlogListView.vue';
+import BlogView from '@/views/blog/BlogView.vue';
+import BlogEditorView from '@/views/blog/BlogEditorView.vue';
+
+export default [
+  { path: '/blogs/create', name: 'BlogCreate', component: BlogEditorView, meta: { requiresAuth: true } },
+  { path: '/blogs/:id/edit', name: 'BlogEdit', component: BlogEditorView, props: true, meta: { requiresAuth: true } },
+  // Slug-only route first so it doesn't get captured by the :id route
+  { path: '/blogs/:slug', name: 'BlogSlug', component: BlogView, props: route => ({ slug: route.params.slug }) },
+  // Id-constrained route (numeric id only) with optional slug for canonical links
+  { path: '/blogs/:id(\\d+)/:slug?', name: 'Blog', component: BlogView, props: true },
+  { path: '/blogs', name: 'BlogList', component: BlogListView },
+];

frontend/src/router/index.js

@@ -6,6 +6,7 @@ import socialRoutes from './socialRoutes';
 import settingsRoutes from './settingsRoutes';
 import adminRoutes from './adminRoutes';
 import falukantRoutes from './falukantRoutes';
+import blogRoutes from './blogRoutes';
 
 const routes = [
   {
@@ -18,6 +19,7 @@ const routes = [
   ...settingsRoutes,
   ...adminRoutes,
   ...falukantRoutes,
+  ...blogRoutes,
 ];
 
 const router = createRouter({