[fix](trx-frontend-http): tidy up the map's filter bar

The bar explained itself in prose: "All bands visible by default" sat
between the chips and the next group, taking width the bar could not
spare and reading as a stray line of text. An "All" chip says the same
thing in a chip's width and gives the selection somewhere to be undone.

Band chips also came up dimmed at the very moment every band was on the
map -- an empty selection is no filter at all, so nothing is dimmed
until something is picked. The path toggles drop their "On"/"Off"
suffix, which cost most of a row and only repeated what their own
highlight already said; state moves to aria-pressed and the tooltip.

The rest is alignment. The rule dividing the buttons from the filters
is drawn on the button block's edge, and a centred block left it
floating as a stub beside a two-row bar; stacked, it lay down the left
of a block that sits underneath. The labels sat at their natural
widths, so each row's first control started somewhere different, and
the two pairs of phase buttons differed in width, so the groups after
them missed each other by four pixels. One gutter for every label, one
width for both pairs, and the search field moved last where it can take
the room the fixed-width groups leave.

The map layout test now covers the chips, the divider's height and the
rows' shared start.

Signed-off-by: Stan Grams <sjg@haxx.space>

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

@@ -2570,7 +2570,10 @@ button.map-qso-card:focus-visible {
   z-index: 410;
   display: flex;
   flex-flow: row nowrap;
-  align-items: center;
+  /* Stretched, not centred: the rule dividing the filters from the buttons is
+     drawn on the button block's edge, and it has to run the height of the bar
+     rather than float beside it as a stub. */
+  align-items: stretch;
   gap: 0.5rem;
   width: auto;
   max-height: calc(100% - 1.4rem);
@@ -2590,6 +2593,9 @@ button.map-qso-card:focus-visible {
   flex: 1 1 auto;
   flex-flow: row wrap;
   align-items: center;
+  /* Rows keep their own height when the bar is taller than they are, so the
+     groups stay a bar's two rows rather than drifting apart to fill it. */
+  align-content: center;
   gap: 0.35rem 0.5rem;
   min-width: 0;
 }
@@ -2603,6 +2609,9 @@ button.map-qso-card:focus-visible {
 .map-overlay-actions {
   display: flex;
   flex: 0 0 auto;
+  /* The block spans the bar so its divider can; the buttons still sit level
+     with the middle of it. */
+  align-self: stretch;
   align-items: center;
   gap: 0.4rem;
 }
@@ -2625,17 +2634,29 @@ button.map-qso-card:focus-visible {
   padding-right: 0;
   border-right: 0;
 }
-/* The search field takes whatever room the fixed-width groups leave. */
+/* The search field takes whatever room the fixed-width groups leave, up to a
+   width past which a text box spanning the map reads as a mistake. */
 .map-overlay-panel .map-filter-grow {
   flex: 1 1 9rem;
+  max-width: 26rem;
 }
+/* One gutter for every label, so whichever group starts a row starts it in the
+   same place: at their natural widths the labels staggered each row's first
+   control by however much the label above it was wider or narrower. */
 .map-overlay-panel .map-locator-filter-label {
-  min-width: 0;
+  min-width: 3.5rem;
   padding-top: 0;
   font-size: 0.72rem;
   letter-spacing: 0.02em;
   white-space: nowrap;
 }
+/* The two rows of the bar are led by the two pairs of phase buttons, and
+   SOURCE|BAND is wider than TRX|CONTACT: left to their own widths the groups
+   after them missed each other by four pixels. One width for both pairs. */
+.map-overlay-panel .map-locator-phase-row {
+  flex: 0 0 auto;
+  min-width: 9rem;
+}
 .map-overlay-panel .map-history-select {
   flex: 0 0 auto;
   width: auto;
@@ -3471,6 +3492,23 @@ body.map-fake-fullscreen-active {
   border-color: color-mix(in srgb, var(--border-light) 68%, transparent);
   background: color-mix(in srgb, var(--input-bg) 96%, transparent);
 }
+/* "All" clears the selection rather than naming a band or a source, so it
+   borrows the phase buttons' look instead of a colour of its own — and says
+   in one chip's width what a line of helper text used to say in the bar. */
+.map-locator-chip-all {
+  --chip-color: var(--border-light);
+  color: var(--text-muted);
+}
+.map-locator-chip-all.is-active {
+  border-color: var(--accent-green);
+  background: color-mix(in srgb, var(--accent-green) 10%, var(--input-bg));
+  color: var(--accent-green);
+}
+.map-locator-chip-all .map-locator-chip-text {
+  font-weight: 700;
+  letter-spacing: 0.03em;
+  text-transform: uppercase;
+}
 .map-locator-chip-text {
   font-size: 0.78rem;
   font-weight: 600;
@@ -4196,9 +4234,23 @@ body[data-operator-layout="broadcast"] #cw-bar-overlay {
     padding-right: 0;
     border-right: 0;
   }
+  /* Stacked in a column the panel scrolls, and the search field is no use at
+     the bottom of it: it goes back to the top, where it needs no scrolling. */
+  .map-overlay-panel .map-filter-grow {
+    order: -1;
+    max-width: none;
+  }
   .map-overlay-actions {
     justify-content: flex-end;
   }
+  /* Stacked, the buttons sit under the filters rather than beside them, so the
+     rule that divides them has to lie across the panel, not down its left. */
+  .map-overlay-panel:not(.filters-hidden) .map-overlay-actions {
+    padding-left: 0;
+    padding-top: 0.5rem;
+    border-left: 0;
+    border-top: 1px solid color-mix(in srgb, var(--border-light) 55%, transparent);
+  }
   .map-overlay-panel .map-paths-hint {
     display: block;
     font-size: 0.75rem;