Implemented epics read/write

web/src/styles.css

@@ -994,33 +994,7 @@ body {
   border: 1px solid #3b82f6;
 }
 
-/* ── Time range / history navigation ──────────────────────────────────────── */
-
-.time-nav {
-  display: flex;
-  align-items: center;
-  gap: 0.35rem;
-  flex-wrap: wrap;
-}
-
-.time-input {
-  font-size: 0.75rem;
-  background: #1a2236;
-  border: 1px solid #2d3748;
-  border-radius: 4px;
-  color: #cbd5e1;
-  padding: 0.2rem 0.4rem;
-  cursor: pointer;
-}
-.time-input:focus { outline: none; border-color: #63b3ed; }
-
-/* Colour-scheme hint for the browser's native date-time picker */
-.time-input::-webkit-calendar-picker-indicator { filter: invert(0.8); }
-
-.time-sep {
-  color: #475569;
-  font-size: 0.8rem;
-}
+/* time-nav styles are in the time-nav-bar section at the bottom of this file */
 
 /* Overlay shown inside a plot widget while history is loading or unavailable */
 .hist-overlay {
@@ -1966,3 +1940,136 @@ kbd {
 }
 .ctx-help-link:hover { text-decoration: underline; }
 
+
+/* ── Historical time-nav bar (below main toolbar, hidden by default) ──────── */
+
+.time-nav-bar {
+  display: flex;
+  align-items: center;
+  gap: 0.5rem;
+  padding: 0.35rem 1rem;
+  background: #161b27;
+  border-bottom: 1px solid #2d3748;
+  flex-shrink: 0;
+  flex-wrap: wrap;
+}
+
+.time-input {
+  font-size: 0.75rem;
+  background: #1a2236;
+  border: 1px solid #2d3748;
+  color: #e2e8f0;
+  border-radius: 4px;
+  padding: 0.25rem 0.4rem;
+  cursor: pointer;
+  height: 28px;
+  box-sizing: border-box;
+}
+.time-input:focus { outline: none; border-color: #63b3ed; }
+.time-input::-webkit-calendar-picker-indicator { filter: invert(0.8); }
+
+.time-sep {
+  color: #475569;
+  font-size: 0.8rem;
+}
+
+/* ── Fullscreen mode ──────────────────────────────────────────────────────── */
+
+.fs-view {
+  width: 100vw;
+  height: 100vh;
+  overflow: auto;
+  background: #0f1117;
+  display: flex;
+}
+
+.fs-error {
+  width: 100vw;
+  height: 100vh;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  color: #f87171;
+  font-size: 1rem;
+}
+
+/* ── Signal drop menu (drop onto existing widget) ─────────────────────────── */
+
+.signal-drop-backdrop {
+  position: absolute;
+  inset: 0;
+  z-index: 9500;
+}
+
+.signal-drop-menu {
+  position: fixed;
+  background: #1a1f2e;
+  border: 1px solid #2d3748;
+  border-radius: 6px;
+  box-shadow: 0 4px 20px rgba(0,0,0,0.6);
+  min-width: 220px;
+  z-index: 9600;
+  overflow: hidden;
+  transform: translateY(4px);
+}
+
+.signal-drop-header {
+  padding: 0.5rem 0.75rem;
+  font-size: 0.75rem;
+  color: #64748b;
+  border-bottom: 1px solid #2d3748;
+}
+
+.signal-drop-header strong {
+  color: #94a3b8;
+}
+
+.ctx-cancel {
+  color: #6b7280;
+  border-top: 1px solid #2d3748;
+}
+
+/* ── Button widget: pressed / mode hint ──────────────────────────────────── */
+
+.btn-pressed {
+  background: #1e40af !important;
+  border-color: #3b82f6 !important;
+  color: #93c5fd !important;
+}
+
+.btn-mode-hint {
+  font-size: 0.65rem;
+  opacity: 0.7;
+  margin-left: 0.35rem;
+}
+
+/* ── PropertiesPane: signals list + hint text ─────────────────────────────── */
+
+.prop-signals-list {
+  display: flex;
+  flex-direction: column;
+  gap: 0.2rem;
+  width: 100%;
+}
+
+.prop-signal-row {
+  display: flex;
+  align-items: center;
+  gap: 0.25rem;
+  justify-content: space-between;
+}
+
+.prop-sig-remove {
+  font-size: 0.65rem;
+  opacity: 0.6;
+  flex-shrink: 0;
+}
+.prop-sig-remove:hover { opacity: 1; color: #f87171; }
+
+.prop-hint {
+  display: block;
+  font-size: 0.65rem;
+  color: #475569;
+  margin-top: 0.15rem;
+  line-height: 1.2;
+}