rename: Jarvis -> Jervis target, scheme, and folder throughout

The bundle-ID and display-name renames weren't enough — the actual
Xcode target/product name was still "Jarvis", which drives CFBundleName,
Xcode's Organizer archive list, the .xcodeproj filename, and the scheme
name. Renamed all the way through:

- project.yml: top-level name, target key, PRODUCT_NAME, source/info paths
- Jarvis/ -> Jervis/ (source folder, git-tracked as renames, no content
  diffs on the moved files)
- .gitignore, CI workflows, README, CONTRIBUTING: Jarvis.xcodeproj /
  scheme Jarvis -> Jervis.xcodeproj / scheme Jervis

Verified: xcodebuild -scheme Jervis succeeds, produces Jervis.app,
CFBundleName/CFBundleExecutable/CFBundleDisplayName all read "Jervis".
CFBundleIdentifier intentionally stays com.kisani.jarvis (per prior
decision — bundle ID isn't user-facing anywhere including Organizer).

Swift type names (JarvisApp, JarvisWordmark, etc.) and the Gitea repo
name/URL are unchanged — pure internal source identifiers, not user or
developer-facing product identity.

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

Jervis/Store/ServerSettings.swift

@@ -0,0 +1,48 @@
+// ServerSettings.swift
+// Jarvis — persists the configured server host
+
+import Foundation
+
+@MainActor
+final class ServerSettings: ObservableObject {
+    static let shared = ServerSettings()
+
+    private let key = "jarvis_server_host"
+
+    @Published var host: String? {
+        didSet { UserDefaults.standard.set(host, forKey: key) }
+    }
+
+    var isConfigured: Bool { host != nil }
+
+    private init() {
+        host = UserDefaults.standard.string(forKey: key)
+    }
+
+    func save(host: String) async throws {
+        try await APIClient.shared.configure(host: host)
+        _ = try await APIClient.shared.checkHealth()
+        self.host = host
+        WebSocketManager.shared.connect(host: host)
+    }
+
+    func reset() {
+        host = nil
+        WebSocketManager.shared.disconnect()
+    }
+
+    /// Re-establish REST + WebSocket from a previously saved host on app launch.
+    func reconnectIfConfigured() async {
+        guard let host else { return }
+        try? await APIClient.shared.configure(host: host)
+        WebSocketManager.shared.connect(host: host)
+    }
+
+    /// Point REST + WebSocket at a host the ConnectivityManager already verified
+    /// (skips the health check — the probe just confirmed it).
+    func activate(host: String) async {
+        try? await APIClient.shared.configure(host: host)
+        self.host = host
+        WebSocketManager.shared.connect(host: host)
+    }
+}