feat: Move /events/latest to /dojos/activity following Rails Way

- RESTfulなURLパターンに従い、道場の活動状況を /dojos/activity に移動
- 情報アーキテクチャの改善（道場関連は/dojos配下に統一）
- 旧URL (/events/latest) から新URLへの301リダイレクトを設定
- テストを追加（最小限の実装、YAGNI原則に従う）

Author: yasulab

app/controllers/dojos_controller.rb

@@ -105,4 +105,39 @@ def show
       format.csv  { send_data render_to_string, type: :csv }
     end
   end
+
+  # GET /dojos/activity
+  # 道場の活動状況を表示（旧 /events/latest から移行）
+  def activity
+    @latest_event_by_dojos = []
+    Dojo.active.each do |dojo|
+      link_in_note = dojo.note.match(URI.regexp)
+      date_in_note = dojo.note.match(/(\d{4}-\d{1,2}-\d{1,2})/) # YYYY-MM-DD
+      last_session_link = link_in_note.nil? ? dojo_path(dojo.id) : link_in_note.to_s
+      last_session_date = date_in_note.nil? ? dojo.created_at    : Time.zone.parse(date_in_note.to_s)
+
+      latest_event    = dojo.event_histories.newest.first
+      latest_event_at = latest_event.nil? ? Time.zone.parse('2000-01-23') : latest_event.evented_at
+      @latest_event_by_dojos << {
+        id:   dojo.id,
+        name: dojo.name,
+        note: dojo.note,
+        url:  dojo.url,
+        has_event_histories: latest_event.nil?,
+
+        # 過去のイベント開催日と note 内の日付を比較し、新しい方の日付を表示
+        event_at: (latest_event_at < last_session_date) ?
+          last_session_date.strftime("%Y-%m-%d") :
+          latest_event.evented_at.strftime("%Y-%m-%d"),
+
+        # 過去のイベント開催日と note 内の日付を比較し、新しい方のリンクを表示
+        event_url: (latest_event_at < last_session_date) ?
+          last_session_link :
+          latest_event.event_url
+      }
+    end
+
+    # Sort by older events first && older Dojo ID first if same event date.
+    @latest_event_by_dojos.sort_by!{ |dojo| [dojo[:event_at], dojo[:id]] }
+  end
 end

app/controllers/events_controller.rb

@@ -13,42 +13,4 @@ def index
       }
     end
   end
-
-  def latest
-    # 現在はノートで細かな確認ができるため不要? (念のため残しています)
-    # @active_dojos_verified = [
-    #  '和歌山', '市川真間', '泉', '石垣', '南紀田辺', '三好', '市川', 'ひばりヶ丘', '伊勢',
-    #  '徳島', '柏', '富山', 'ももち', '木曽', '熊本'
-    # ]
-    @latest_event_by_dojos = []
-    Dojo.active.each do |dojo|
-      link_in_note = dojo.note.match(URI.regexp)
-      date_in_note = dojo.note.match(/(\d{4}-\d{1,2}-\d{1,2})/) # YYYY-MM-DD
-      last_session_link = link_in_note.nil? ? dojo_path(dojo.id) : link_in_note.to_s
-      last_session_date = date_in_note.nil? ? dojo.created_at    : Time.zone.parse(date_in_note.to_s)
-
-      latest_event    = dojo.event_histories.newest.first
-      latest_event_at = latest_event.nil? ? Time.zone.parse('2000-01-23') : latest_event.evented_at
-      @latest_event_by_dojos << {
-        id:   dojo.id,
-        name: dojo.name,
-        note: dojo.note,
-        url:  dojo.url,
-        has_event_histories: latest_event.nil?,
-
-        # 過去のイベント開催日と note 内の日付を比較し、新しい方の日付を表示
-        event_at: (latest_event_at < last_session_date) ?
-          last_session_date.strftime("%Y-%m-%d") :
-          latest_event.evented_at.strftime("%Y-%m-%d"),
-
-        # 過去のイベント開催日と note 内の日付を比較し、新しい方のリンクを表示
-        event_url: (latest_event_at < last_session_date) ?
-          last_session_link :
-          latest_event.event_url
-      }
-    end
-
-    # Sort by older events first && older Dojo ID first if same event date.
-    @latest_event_by_dojos.sort_by!{ |dojo| [dojo[:event_at], dojo[:id]] }
-  end
 end

app/views/events/latest.html.erb renamed to app/views/dojos/activity.html.erb

@@ -1,6 +1,6 @@
 <% provide(:title, '道場情報 - 直近の開催日まとめ') %>
 <% provide(:desc, '道場別の直近開催日をまとめたページです。') %>
-<% provide(:url, events_latest_url) %>
+<% provide(:url, activity_dojos_url) %>
 <% provide(:meta_image, '/img/ogp-events.jpeg') %>
 
 <section class="cover">

config/routes.rb

@@ -64,7 +64,11 @@
   get "/kata"             => "docs#kata"
   #get "/debug/kata"       => "docs#kata"
 
-  resources :dojos,    only: %i(index show) # GET /dojos.json returns dojo data as JSON
+  resources :dojos, only: %i(index show) do # GET /dojos.json returns dojo data as JSON
+    collection do
+      get :activity  # GET /dojos/activity - 道場活動状況（旧 /events/latest）
+    end
+  end
   resources :docs,     only: %i(index show)
   resources :podcasts, only: %i(index show)
   resources :spaces,   only: %i(index)
@@ -84,9 +88,11 @@
   #resources :stats,  only: %i(show)
   #resources :pokemons,  only: %i(index create)
 
-  # Upcoming Events & Latest Events
+  # Upcoming Events
   get '/events'        => 'events#index'
-  get '/events/latest' => 'events#latest'
+  
+  # Legacy redirect: /events/latest moved to /dojos/activity
+  get '/events/latest', to: redirect('/dojos/activity')
 
   # Redirects
   get "/releases/2016/12/12/new-backend", to: redirect('/docs/post-backend-update-history')

spec/requests/dojos_spec.rb

@@ -318,4 +318,43 @@
       end
     end
   end
+
+  describe "GET /dojos/activity" do
+    before do
+      # アクティブな道場を作成
+      @active_dojo = create(:dojo,
+        name: "Active Dojo",
+        created_at: 1.week.ago,
+        inactivated_at: nil
+      )
+      
+      # 非アクティブな道場を作成
+      @inactive_dojo = create(:dojo,
+        name: "Inactive Dojo",
+        created_at: 2.years.ago,
+        inactivated_at: 1.year.ago
+      )
+    end
+    
+    it "returns http success" do
+      get activity_dojos_path
+      expect(response).to have_http_status(:success)
+    end
+    
+    it "displays the activity status page" do
+      get activity_dojos_path
+      expect(response.body).to include("道場別の直近の開催日まとめ")
+    end
+    
+    it "includes only active dojos" do
+      get activity_dojos_path
+      expect(response.body).to include(@active_dojo.name)
+      expect(response.body).not_to include(@inactive_dojo.name)
+    end
+    
+    it "redirects from old URL /events/latest" do
+      get "/events/latest"
+      expect(response).to redirect_to(activity_dojos_path)
+    end
+  end
 end