Fix all SwiftLint violations across codebase

Resolves 130+ violations including deployment target checks, code style issues, and formatting inconsistencies. Adds SwiftLint disable comments for compiler-required availability checks while maintaining deployment target compliance.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

Shared/Trending/TrendingView.swift

@@ -78,12 +78,12 @@ struct TrendingView: View {
         }
         #else
         .sheet(isPresented: $presentingCountrySelection) {
-                    TrendingCountry(selectedCountry: $country)
-                    #if os(macOS)
-                        .frame(minWidth: 400, minHeight: 400)
-                    #endif
-                }
-                .background(
+            TrendingCountry(selectedCountry: $country)
+                #if os(macOS)
+                    .frame(minWidth: 400, minHeight: 400)
+                #endif
+        }
+        .background(
                     Button("Refresh") {
                         resource.load()
                             .onFailure { self.error = $0 }
@@ -131,10 +131,10 @@ struct TrendingView: View {
         }
         #else
         .onReceive(NotificationCenter.default.publisher(for: UIApplication.willEnterForegroundNotification)) { _ in
-                    resource.loadIfNeeded()?
-                        .onFailure { self.error = $0 }
-                        .onSuccess { _ in self.error = nil }
-                }
+            resource.loadIfNeeded()?
+                .onFailure { self.error = $0 }
+                .onSuccess { _ in self.error = nil }
+        }
         #endif
     }