feat(home): 랭킹 탭 화면을 조립한다

SodaLive/Sources/V2/Main/Home/Ranking/MainHomeRankingView.swift

@@ -1,8 +1,112 @@
 import SwiftUI
 
 struct MainHomeRankingView: View {
+    let onTapCreator: (Int) -> Void
+
+    @StateObject private var viewModel = MainHomeRankingViewModel()
+
+    init(onTapCreator: @escaping (Int) -> Void = { _ in }) {
+        self.onTapCreator = onTapCreator
+    }
+
     var body: some View {
-        MainPlaceholderTabView(title: "랭킹")
+        ZStack {
+            Color.black
+                .ignoresSafeArea()
+
+            if viewModel.isLoading && !viewModel.hasLoaded {
+                ProgressView()
+                    .progressViewStyle(CircularProgressViewStyle(tint: .white))
+            } else if viewModel.items.isEmpty {
+                MainHomeRankingEmptyStateView()
+            } else {
+                rankingContent
+            }
+        }
+        .onAppear {
+            if !viewModel.hasLoaded {
+                viewModel.fetchRankings()
+            }
+        }
+    }
+
+    private var rankingContent: some View {
+        ScrollView(showsIndicators: false) {
+            VStack(alignment: .leading, spacing: SodaSpacing.s8) {
+                ForEach(firstRankItems) { item in
+                    MainHomeRankingCard(
+                        item: item,
+                        showRankChange: viewModel.showRankChange,
+                        columnsPerRow: 1,
+                        onTapCreator: onTapCreator
+                    )
+                }
+
+                if !secondToSeventhRankItems.isEmpty {
+                    LazyVGrid(columns: twoColumns, alignment: .center, spacing: SodaSpacing.s8) {
+                        ForEach(secondToSeventhRankItems) { item in
+                            MainHomeRankingCard(
+                                item: item,
+                                showRankChange: viewModel.showRankChange,
+                                columnsPerRow: 2,
+                                onTapCreator: onTapCreator
+                            )
+                        }
+                    }
+                }
+
+                if !eighthToTenthRankItems.isEmpty {
+                    LazyVGrid(columns: threeColumns, alignment: .center, spacing: SodaSpacing.s8) {
+                        ForEach(eighthToTenthRankItems) { item in
+                            MainHomeRankingCard(
+                                item: item,
+                                showRankChange: viewModel.showRankChange,
+                                columnsPerRow: 3,
+                                onTapCreator: onTapCreator
+                            )
+                        }
+                    }
+                }
+
+                if !rowRankItems.isEmpty {
+                    VStack(spacing: SodaSpacing.s8) {
+                        ForEach(rowRankItems) { item in
+                            MainHomeRankingRow(
+                                item: item,
+                                showRankChange: viewModel.showRankChange,
+                                onTapCreator: onTapCreator
+                            )
+                        }
+                    }
+                }
+            }
+            .padding(.horizontal, SodaSpacing.s8)
+            .padding(.vertical, SodaSpacing.s20)
+        }
+    }
+
+    private var twoColumns: [GridItem] {
+        [GridItem(.flexible()), GridItem(.flexible())]
+    }
+
+    private var threeColumns: [GridItem] {
+        [GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible())]
+    }
+
+    private var firstRankItems: [MainHomeCreatorRankingItem] {
+        viewModel.items.filter { $0.rank == 1 }
+    }
+
+    private var secondToSeventhRankItems: [MainHomeCreatorRankingItem] {
+        viewModel.items.filter { 2...7 ~= $0.rank }
+    }
+
+    private var eighthToTenthRankItems: [MainHomeCreatorRankingItem] {
+        viewModel.items.filter { 8...10 ~= $0.rank }
+    }
+
+    private var rowRankItems: [MainHomeCreatorRankingItem] {
+        viewModel.items.filter { $0.rank >= 11 }
     }
 }