[style](trx-frontend-http): tighten APRS bar spacing, shrink clear btn, remove cap

- Reduce frame line-height 1.45→1.3 and pos sub-line to 1.1 to close
  the gap between the info and coordinate rows within each entry
- Shrink clear button (smaller padding, 0.78em font)
- Remove 5-entry cap; full history visible via scroll

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -662,9 +662,9 @@ small { color: var(--text-muted); }
   background: none;
   border: 1px solid color-mix(in srgb, var(--accent-green) 40%, transparent);
   border-radius: 999px;
-  padding: 0.05rem 0.45rem;
+  padding: 0.02rem 0.3rem;
   font-family: inherit;
-  font-size: inherit;
+  font-size: 0.78em;
   font-weight: 600;
   letter-spacing: 0.06em;
   color: var(--accent-green);
@@ -682,7 +682,7 @@ small { color: var(--text-muted); }
   font-size: clamp(0.58rem, 1.05vw, 0.74rem);
   display: flex;
   flex-direction: column;
-  line-height: 1.45;
+  line-height: 1.3;
   opacity: 1;
 }
 .aprs-bar-frame-main {
@@ -690,6 +690,10 @@ small { color: var(--text-muted); }
   overflow: hidden;
   text-overflow: ellipsis;
 }
+.aprs-bar-frame-pos {
+  line-height: 1.1;
+  margin-bottom: 0.1rem;
+}
 .aprs-bar-frame-pos {
   display: block;
   white-space: nowrap;