Fix terminal height: fit addon now measures real container size

- Show terminal container BEFORE calling fitAddon.fit() so it can
  measure actual dimensions (was measuring display:none → 0 height)
- Read actual terminal rows from JS after init (getDimensions)
- Remove max-height:600px CSS constraint, let terminal fill viewport
- Revert preRender approach that caused flickering on arrow selection
- Height is now dynamic (instance property) instead of hardcoded 30

src/OpenTheBox.Web/WebGameHost.cs

@@ -592,7 +592,7 @@ public sealed class WebGameHost
                 ColorSystem = ColorSystemSupport.TrueColor
             });
             bufferConsole.Profile.Width = WebTerminal.Width;
-            bufferConsole.Profile.Height = WebTerminal.Height;
+            bufferConsole.Profile.Height = _terminal.Height;
 
             bufferConsole.Write(InventoryPanel.Render(_state, _registry, _loc, scrollOffset, selectedIndex: selectedIndex));
 

src/OpenTheBox.Web/WebTerminal.cs

@@ -28,7 +28,7 @@ public sealed class WebTerminal
         });
 
     public const int Width = 120;
-    public const int Height = 30;
+    public int Height { get; private set; } = 30;
 
     public WebTerminal(IJSRuntime js)
     {
@@ -37,12 +37,23 @@ public sealed class WebTerminal
     }
 
     /// <summary>
-    /// Initializes the xterm.js terminal in the browser.
+    /// Initializes the xterm.js terminal in the browser and reads actual dimensions.
     /// </summary>
     public async Task InitAsync()
     {
         await _js.InvokeVoidAsync("terminalInterop.init");
+
+        // Read actual terminal dimensions after fitAddon has sized the terminal
+        try
+        {
+            var dims = await _js.InvokeAsync<TerminalDimensions>("terminalInterop.getDimensions");
+            if (dims.rows >= 30)
+                Height = dims.rows;
         }
+        catch { /* fallback to 30 */ }
+    }
+
+    private record TerminalDimensions(int cols, int rows);
 
     // ── Output ───────────────────────────────────────────────────────────
 
@@ -83,7 +94,7 @@ public sealed class WebTerminal
             ColorSystem = ColorSystemSupport.TrueColor
         });
         console.Profile.Width = Width;
-        console.Profile.Height = Height;
+        console.Profile.Height = _instance?.Height ?? 50;
         console.Write(renderable);
         return writer.ToString();
     }
@@ -227,6 +238,7 @@ public sealed class WebTerminal
 
         while (true)
         {
+
             int scrollOffset = 0;
             if (selected >= pageSize)
                 scrollOffset = selected - pageSize + 1;
@@ -262,7 +274,6 @@ public sealed class WebTerminal
                 console.MarkupLine("[dim]  ▼ ...[/]");
 
             string rendered = writer.ToString().Replace("\n", "\r\n");
-            // Count actual line breaks — Split('\n').Length overcounts by 1 due to trailing newline
             int lineCount = rendered.Count(c => c == '\n');
 
             await WriteAsync(rendered);
@@ -278,7 +289,6 @@ public sealed class WebTerminal
                     selected = (selected + 1) % options.Count;
                     break;
                 case ConsoleKey.Enter:
-                    // Clear the rendered selection before returning
                     await WriteAsync($"\x1b[{lineCount}A\x1b[J");
                     return selected;
                 case ConsoleKey.D1 or ConsoleKey.NumPad1: if (options.Count >= 1) { await WriteAsync($"\x1b[{lineCount}A\x1b[J"); return 0; } break;
@@ -292,7 +302,7 @@ public sealed class WebTerminal
                 case ConsoleKey.D9 or ConsoleKey.NumPad9: if (options.Count >= 9) { await WriteAsync($"\x1b[{lineCount}A\x1b[J"); return 8; } break;
             }
 
-            // Clear and re-render
+            // Clear menu before re-rendering
             await WriteAsync($"\x1b[{lineCount}A\x1b[J");
         }
     }

src/OpenTheBox.Web/wwwroot/css/terminal.css

@@ -31,8 +31,7 @@ body {
 #terminal {
     width: 100%;
     height: 100%;
-    max-width: 960px;
-    max-height: 600px;
+    max-width: 1200px;
 }
 
 /* Loading screen */

src/OpenTheBox.Web/wwwroot/js/terminal-interop.js

@@ -24,12 +24,17 @@ window.terminalInterop = {
         const fitAddon = new FitAddon.FitAddon();
         term.loadAddon(fitAddon);
 
+        // Show terminal container BEFORE opening so fitAddon can measure real dimensions
+        document.getElementById('loading').classList.add('hidden');
+        document.getElementById('terminal-container').classList.add('active');
+
         term.open(document.getElementById('terminal'));
 
-        // Fit to container, but enforce minimum dimensions for game readability
+        // Fit to container, enforce minimum dimensions for game readability
         fitAddon.fit();
-        if (term.cols < 120 || term.rows < 30) {
-            term.resize(Math.max(term.cols, 120), Math.max(term.rows, 30));
+        const minCols = 120, minRows = 30;
+        if (term.cols < minCols || term.rows < minRows) {
+            term.resize(Math.max(term.cols, minCols), Math.max(term.rows, minRows));
         }
 
         // Forward key input to C#
@@ -40,18 +45,13 @@ window.terminalInterop = {
         // Handle resize
         window.addEventListener('resize', function () {
             fitAddon.fit();
-            if (term.cols < 120 || term.rows < 30) {
-                term.resize(Math.max(term.cols, 120), Math.max(term.rows, 30));
+            if (term.cols < minCols || term.rows < minRows) {
+                term.resize(Math.max(term.cols, minCols), Math.max(term.rows, minRows));
             }
         });
 
         this.term = term;
         this.fitAddon = fitAddon;
-
-        // Show terminal, hide loading
-        document.getElementById('loading').classList.add('hidden');
-        document.getElementById('terminal-container').classList.add('active');
-
         term.focus();
     },
 
@@ -72,5 +72,12 @@ window.terminalInterop = {
         if (this.term) {
             this.term.focus();
         }
+    },
+
+    getDimensions: function () {
+        if (this.term) {
+            return { cols: this.term.cols, rows: this.term.rows };
+        }
+        return { cols: 120, rows: 30 };
     }
 };