Fix terminal left clipping — consolidate duplicate padding

Removed conflicting padding from layout.css and terminal.css that
stacked to ~11px. Now a single 3px top+left padding is applied
directly on the .xterm element, keeping text visible and tidy.

frontend/src/css/layout.css

@@ -94,7 +94,7 @@
 .terminal-container {
     position: absolute;
     inset: 0;
-    padding: 3px;
+    padding: 0;
 }
 
 /* -----------------------------------------------------------------------

frontend/src/css/terminal.css

@@ -62,8 +62,7 @@
     flex: 1;
     position: relative;
     overflow: hidden;
-    /* Slight padding so terminal text doesn't hug edges */
-    padding: var(--space-1);
+    padding: 0;
 }
 
 /* xterm.js overrides for consistent look */
@@ -72,7 +71,7 @@
     flex: 1;
     height: 100%;
     min-height: 0;
-    padding: var(--space-1);
+    padding: 3px 0 0 3px;
 }
 
 .terminal-container .xterm-screen,