Initial commit: nightly iOS app + Supabase backend

iOS SwiftUI app with Supabase auth/realtime, Node.js backend,
Docker/Supabase self-hosted infrastructure, and APNs scheduler.

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

ios/NightThoughts/ViewModels/FeedViewModel.swift

@@ -0,0 +1,40 @@
+import Foundation
+
+@MainActor
+class FeedViewModel: ObservableObject {
+    @Published var posts: [Post] = []
+    @Published var isLoading = false
+
+    func load() async {
+        isLoading = true
+        defer { isLoading = false }
+        do {
+            posts = try await supabase.getFeed()
+        } catch {
+            #if DEBUG
+            posts = Post.previews
+            #endif
+        }
+    }
+
+    func resonate(_ post: Post) async {
+        guard let idx = posts.firstIndex(where: { $0.id == post.id }) else { return }
+        let wasActive = posts[idx].hasResonated
+
+        posts[idx].hasResonated   = !wasActive
+        posts[idx].resonanceCount += wasActive ? -1 : 1
+
+        do {
+            try await supabase.toggleResonance(postId: post.id, currentlyActive: wasActive)
+        } catch {
+            posts[idx].hasResonated   = wasActive
+            posts[idx].resonanceCount += wasActive ? 1 : -1
+        }
+    }
+
+    /// Neuen Post vom Realtime-Service in den Feed einfügen
+    func prepend(_ post: Post) {
+        guard !posts.contains(where: { $0.id == post.id }) else { return }
+        posts.insert(post, at: 0)
+    }
+}