Add headless CMS for official site content management

Integrate article and page management into the Laravel admin dashboard
to serve as a headless CMS for the Next.js frontend (usher-site).

Backend:
- 7 migrations: article_categories, article_tags, articles, pivots, attachments, pages
- 5 models with relationships: Article, ArticleCategory, ArticleTag, ArticleAttachment, Page
- 4 admin controllers: articles (with publish/archive/pin), categories, tags, pages
- Admin views with EasyMDE markdown editor, multi-select categories/tags
- Navigation section "官網管理" in admin sidebar

API (v1):
- GET /api/v1/articles (filtered by type, category, tag, search; paginated)
- GET /api/v1/articles/{slug} (with related articles)
- GET /api/v1/categories
- GET /api/v1/pages/{slug} (with children)
- GET /api/v1/homepage (aggregated homepage data)
- Attachment download endpoint
- CORS configured for usher.org.tw, vercel.app, localhost:3000

Content migration:
- ImportHugoContent command: imports Hugo markdown files as articles/pages
- Successfully imported 27 articles, 17 categories, 11 tags, 9 pages

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

database/seeders/FinancialWorkflowPermissionsSeeder.php

@@ -90,6 +90,21 @@ class FinancialWorkflowPermissionsSeeder extends Seeder
             'delete_announcements' => '刪除公告',
             'publish_announcements' => '發布公告',
             'manage_all_announcements' => '管理所有公告',
+
+            // ===== 官網文章管理權限 =====
+            'view_articles' => '查看官網文章',
+            'create_articles' => '建立官網文章',
+            'edit_articles' => '編輯官網文章',
+            'delete_articles' => '刪除官網文章',
+            'publish_articles' => '發布官網文章',
+            'manage_all_articles' => '管理所有官網文章',
+
+            // ===== 官網頁面管理權限 =====
+            'view_pages' => '查看官網頁面',
+            'create_pages' => '建立官網頁面',
+            'edit_pages' => '編輯官網頁面',
+            'delete_pages' => '刪除官網頁面',
+            'publish_pages' => '發布官網頁面',
         ];
 
         foreach ($permissions as $name => $description) {
@@ -131,6 +146,19 @@ class FinancialWorkflowPermissionsSeeder extends Seeder
                     'delete_announcements',
                     'publish_announcements',
                     'manage_all_announcements',
+                    // 官網文章管理
+                    'view_articles',
+                    'create_articles',
+                    'edit_articles',
+                    'delete_articles',
+                    'publish_articles',
+                    'manage_all_articles',
+                    // 官網頁面管理
+                    'view_pages',
+                    'create_pages',
+                    'edit_pages',
+                    'delete_pages',
+                    'publish_pages',
                 ],
                 'description' => '秘書長 - 協會行政負責人，負責初審所有財務申請',
             ],
@@ -227,6 +255,19 @@ class FinancialWorkflowPermissionsSeeder extends Seeder
                     'delete_announcements',
                     'publish_announcements',
                     'manage_all_announcements',
+                    // 官網文章管理
+                    'view_articles',
+                    'create_articles',
+                    'edit_articles',
+                    'delete_articles',
+                    'publish_articles',
+                    'manage_all_articles',
+                    // 官網頁面管理
+                    'view_pages',
+                    'create_pages',
+                    'edit_pages',
+                    'delete_pages',
+                    'publish_pages',
                 ],
                 'description' => '理事長 - 協會負責人，負責核決重大財務支出與會員繳費最終審核',
             ],
@@ -244,6 +285,11 @@ class FinancialWorkflowPermissionsSeeder extends Seeder
                     'edit_announcements',
                     'delete_announcements',
                     'publish_announcements',
+                    // 官網文章管理
+                    'view_articles',
+                    'create_articles',
+                    'edit_articles',
+                    'publish_articles',
                 ],
                 'description' => '理事 - 理事會成員，協助監督協會運作與審核特定議案',
             ],
@@ -267,6 +313,11 @@ class FinancialWorkflowPermissionsSeeder extends Seeder
                     'edit_announcements',
                     'delete_announcements',
                     'publish_announcements',
+                    // 官網文章管理
+                    'view_articles',
+                    'create_articles',
+                    'edit_articles',
+                    'publish_articles',
                 ],
                 'description' => '會員管理員 - 專責處理會員入會審核、資料維護與會籍管理',
             ],