Added Room and some little design updates

app/controllers/rooms_controller.rb

@@ -0,0 +1,97 @@
+class RoomsController < ApplicationController
+  before_action :set_room, only: %i[ show edit update destroy ]
+
+  # GET /rooms or /rooms.json
+  # 1. Übersicht aller Räume (Kacheldesign)
+  def index
+    @rooms = Room.all.order(
+      Room.arel_table[:building].asc.nulls_last,
+      Room.arel_table[:floor].asc.nulls_last,
+      :name
+        #      :building, :floor, :name
+      )
+
+    # NEU: Filtert die Räume live nach Name, Gebäude oder Etage
+    if params[:query].present?
+      query_str = "%#{params[:query]}%"
+      @rooms = @rooms.where(
+        "rooms.name LIKE :q OR rooms.building LIKE :q OR rooms.floor LIKE :q",
+        q: query_str
+      )
+    end
+  end
+
+  # GET /rooms/1 or /rooms/1.json
+  # 2. Detailansicht eines Raums mit integrierter Live-Suche für dessen Inventar
+  def show
+    # Basis-Abfrage: Alle Items dieses Raums laden
+    @items = @room.items.includes(:category, :user).order(created_at: :desc)
+
+    # Wenn in der Suchleiste getippt wird, filtert der Controller live
+    if params[:query].present?
+      query_str = "%#{params[:query]}%"
+      @items = @items.where(
+        "items.name LIKE :q OR items.sku LIKE :q OR items.serial_number LIKE :q OR items.sticker_id LIKE :q",
+        q: query_str
+      )
+    end
+  end
+
+  # GET /rooms/new
+  def new
+    @room = Room.new
+  end
+
+  # GET /rooms/1/edit
+  def edit
+  end
+
+  # POST /rooms or /rooms.json
+  def create
+    @room = Room.new(room_params)
+
+    respond_to do |format|
+      if @room.save
+        format.html { redirect_to @room, notice: "Room was successfully created." }
+        format.json { render :show, status: :created, location: @room }
+      else
+        format.html { render :new, status: :unprocessable_content }
+        format.json { render json: @room.errors, status: :unprocessable_content }
+      end
+    end
+  end
+
+  # PATCH/PUT /rooms/1 or /rooms/1.json
+  def update
+    respond_to do |format|
+      if @room.update(room_params)
+        format.html { redirect_to @room, notice: "Room was successfully updated.", status: :see_other }
+        format.json { render :show, status: :ok, location: @room }
+      else
+        format.html { render :edit, status: :unprocessable_content }
+        format.json { render json: @room.errors, status: :unprocessable_content }
+      end
+    end
+  end
+
+  # DELETE /rooms/1 or /rooms/1.json
+  def destroy
+    @room.destroy!
+
+    respond_to do |format|
+      format.html { redirect_to rooms_path, notice: "Room was successfully destroyed.", status: :see_other }
+      format.json { head :no_content }
+    end
+  end
+
+  private
+    # Use callbacks to share common setup or constraints between actions.
+    def set_room
+      @room = Room.find(params.expect(:id))
+    end
+
+    def room_params
+      # :description wurde hier restlos entfernt
+      params.require(:room).permit(:name, :building, :floor)
+    end
+end