[feat](trx-frontend-http): use DSEG14 Classic font for frequency display

Load DSEG14 Classic 14-segment LCD font from CDN and apply it to
the frequency input at 2x size for a realistic radio display look.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Stanislaw Grams <stanislawgrams@gmail.com>

src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css

@@ -19,6 +19,7 @@ body { font-family: sans-serif; margin: 0; min-height: 100vh; display: flex; ali
 .label { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 6px; display: block; }
 .status { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1.1rem 1rem; }
 input.status-input, select.status-input { width: 100%; padding: 0.45rem 0.5rem; font-size: 1rem; border: 1px solid var(--border-light); border-radius: 6px; background: var(--input-bg); color: var(--text); }
+#freq { font-family: 'DSEG14 Classic', monospace; font-size: 2rem; padding: 0.5rem 0.6rem; letter-spacing: 0.05em; }
 .controls-row {
   display: grid;
   grid-template-columns: 1fr 1fr;