mobile: per-view ≤480px rules across the CSS bundle

Adds the @media (max-width: 480px) blocks specified in the design:

- dashboard.css: indicator table hides the 'mobile-hide'-tagged
  columns (Label, Ccy, 1y, anchor, as-of), keeping Symbol / Price /
  1d / 1m. Cell padding + font shrink. Group-tab buttons get a
  bigger touch target.
- panels.css: header padding tightens, scroll-body max-height drops
  to 60vh so log/news stay above the fold in the stacked layout.
- portfolio.css: overall grid keeps 2 cols (already at 640px) with
  tighter gap; action buttons wrap; composer input goes full-width.
- log-chat.css: chat bubbles edge-to-edge, input row stacks, font-
  size:14px on form fields to avoid iOS Safari zoom-on-focus.
- news.css: row collapses to age | (title / source) — source moves
  under the title. Tag filter strip wraps.
- settings.css: form rows stack (label above input). Import picker
  becomes single-column. Buttons full-width.
- auth.css: card padding tightens to free up vertical space when the
  iOS keyboard is up. font-size:14px on inputs.
- public.css: hero headline clamp() lower bound drops to 22px; CTAs
  stack full-width; pricing tier-grid stacks.

indicators.html: tagged the secondary cells with .mobile-hide rather
than relying on positional nth-child — the anchor column is
conditional and would have shifted positions.

336 tests still pass.

app/static/css/panels.css

@@ -90,3 +90,19 @@ table.dense tr:hover td { background: color-mix(in srgb, var(--accent) 5%, trans
   transition: opacity 0.2s;
 }
 .htmx-request .htmx-indicator { opacity: 1; }
+
+
+/* --- Mobile (≤480px) -------------------------------------------------- */
+
+@media (max-width: 480px) {
+  .panel-header {
+    padding: 8px 10px;
+    gap: 8px;
+  }
+  .panel-header .title { font-size: 12px; }
+  .panel-header .meta { font-size: 10px; }
+  .panel-body { padding: 4px 6px; }
+  /* Scroll panels lose some vertical room on small screens so the
+     stacked layout doesn't push log/news off the fold. */
+  .panel-body--scroll { max-height: 60vh; }
+}