M5: Windows client moderation UI; add C ABI getters for account list, user mute/deafen, channel topic

clients/windows/VoiceCat.App/Forms/MainForm.Designer.cs

@@ -4,6 +4,9 @@ partial class MainForm
 {
     private System.ComponentModel.IContainer components = null!;
 
+    // Menu bar
+    private MenuStrip menuStrip = null!;
+
     // Status bar
     private Label lblStatus = null!;
 
@@ -349,6 +352,13 @@ partial class MainForm
         pnlVoice.Controls.Add(flpVoiceBottom);  // Fill — added first
         pnlVoice.Controls.Add(flpVoiceTop);     // Top — added last
 
+        // ── Menu strip ────────────────────────────────────────────────────────
+        menuStrip = new MenuStrip();
+        menuStrip.AccessibleName = "Main menu";
+        menuStrip.Dock = DockStyle.Top;
+        menuStrip.TabIndex = 0;
+        MainMenuStrip = menuStrip;
+
         // ── Form ──────────────────────────────────────────────────────────────
         AutoScaleMode = AutoScaleMode.Font;
         ClientSize = new Size(960, 680);
@@ -358,6 +368,7 @@ partial class MainForm
         Controls.Add(splitMain);  // DockStyle.Fill
         Controls.Add(pnlVoice);   // DockStyle.Bottom
         Controls.Add(lblStatus);  // DockStyle.Top
+        Controls.Add(menuStrip);  // DockStyle.Top (placed at the very top)
         StartPosition = FormStartPosition.CenterScreen;
         Text = "VoiceCat";
     }