fix: SMB share enumeration, BrowseView polish, sign out, Login branding

- Fix "Bad Network Name": BrowseView at root "/" for SMB now calls
  listShares() instead of listDirectory with empty share name.
  SMBClient.listShares() filters IPC/admin/hidden ($) shares.
- Add listShares() to NASTransferProtocol; implement in SMB (filters
  ipc/special/$-suffix) and SFTP (returns []).
- BrowseView: premium error state (wifi.exclamationmark icon + Retry
  button with ScaleButtonStyle), empty state, safeAreaInset bottom bar
  replacing toolbar bottomBar (shows current path chip + compact Select
  button), proper disabled state for root selection on SMB.
- FolderRow: replace hardcoded .white with AppTheme.inkInverse for dark
  mode correctness; use folder.fill icon; ScaleButtonStyle for tap feedback.
- LoginView: larger logo (80pt), bolder "Kisani" wordmark (32pt bold),
  tagline, staggered spring entrance animations (0.08-0.36s delay).
- SettingsView: Sign Out button in ACCOUNT section with
  confirmationDialog (destructive, clears connection + resets session).
- ConnectionStore: signOut() resets isSessionActive, onboardingPhotoShown,
  and clears savedConnection (triggers Keychain delete).

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

Shared/Components/FolderRow.swift

@@ -8,14 +8,14 @@ struct FolderRow: View {
     var body: some View {
         Button(action: onTap) {
             HStack(spacing: 12) {
-                Image(systemName: item.isDirectory ? "folder" : "doc")
-                    .font(.system(size: 15, weight: .regular))
-                    .foregroundStyle(isSelected ? .white : AppTheme.inkSecondary)
+                Image(systemName: item.isDirectory ? "folder.fill" : "doc")
+                    .font(.system(size: 14, weight: .regular))
+                    .foregroundStyle(isSelected ? AppTheme.inkInverse : AppTheme.inkSecondary)
                     .frame(width: 22)
 
                 Text(item.name)
                     .font(.system(size: 15, weight: isSelected ? .medium : .regular))
-                    .foregroundStyle(isSelected ? .white : AppTheme.ink)
+                    .foregroundStyle(isSelected ? AppTheme.inkInverse : AppTheme.ink)
                     .lineLimit(1)
 
                 Spacer()
@@ -23,7 +23,7 @@ struct FolderRow: View {
                 if isSelected {
                     Image(systemName: "checkmark")
                         .font(.system(size: 12, weight: .semibold))
-                        .foregroundStyle(.white)
+                        .foregroundStyle(AppTheme.inkInverse)
                 } else if item.isDirectory {
                     Image(systemName: "chevron.right")
                         .font(.system(size: 12, weight: .medium))
@@ -39,6 +39,6 @@ struct FolderRow: View {
             )
             .animation(.spring(response: 0.2, dampingFraction: 0.8), value: isSelected)
         }
-        .buttonStyle(PlainButtonStyle())
+        .buttonStyle(ScaleButtonStyle())
     }
 }

Shared/Persistence/ConnectionStore.swift

@@ -104,6 +104,12 @@ final class ConnectionStore: ObservableObject {
         UserDefaults.standard.removeObject(forKey: "historyEntries")
     }
 
+    func signOut() {
+        isSessionActive = false
+        onboardingPhotoShown = false
+        savedConnection = nil
+    }
+
     var isInQuietHours: Bool {
         guard quietHoursEnabled else { return false }
         let hour = Calendar.current.component(.hour, from: Date())