fix(docker): bars line up down the column; headers name the window (#5214)

Each figure after its bars takes a fixed width, so memory figures of
different lengths no longer shift their bars. CPU and Memory headers say
"last 6h" and the note gives the slice length.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

steward/static/steward.css

@@ -406,7 +406,7 @@ body.dash-editing .widget-drawer { transform:translateY(0); }
 .w-item .w-label a { color:inherit; text-decoration:none; }
 .w-item .w-meta { flex-shrink:0; font-size:0.72rem; color:var(--text-muted); font-variant-numeric:tabular-nums; }
 .w-note { font-size:0.7rem; color:var(--text-dim); margin-top:0.3rem; }
-.w-table col.w-barcol { width:9.5rem; }
+.w-table col.w-barcol { width:10.2rem; }
 /* Bars of a figure's recent past, inline before it (Busiest Containers, #5214):
    the row's tone, faint, with the newest bar solid. A gap is a slice with no
    samples. Heights are set per bar as a % of the row's roof. */
@@ -414,6 +414,8 @@ body.dash-editing .widget-drawer { transform:translateY(0); }
 .w-bars i { flex:1; min-height:1px; background:currentColor; opacity:0.4; border-radius:1px 1px 0 0; }
 .w-bars i:last-child { opacity:1; }
 .w-bars i.gap { background:none; }
+/* The figure after a row of bars takes a fixed width, so the bars line up down the column whatever the figure's length. */
+.w-fig { display:inline-block; min-width:4.9rem; text-align:right; }
 @container (max-width: 26rem) { .w-wide-only { display:none; } .w-table col.w-barcol { width:5.5rem; } }