Initialize VG-Environment from stable VG-IV baseline

src/popup/popup.css

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+* {
+  box-sizing: border-box;
+}
+
+body {
+  margin: 0;
+  min-width: 280px;
+  font-family: Arial, sans-serif;
+  color: #e5edf5;
+  background: #111827;
+}
+
+.popup {
+  padding: 14px;
+}
+
+h1 {
+  margin: 0 0 12px;
+  font-size: 17px;
+  font-weight: 700;
+}
+
+.status {
+  display: grid;
+  gap: 6px;
+  margin-bottom: 14px;
+}
+
+.status-row {
+  display: grid;
+  grid-template-columns: 1fr auto;
+  align-items: center;
+  gap: 14px;
+  padding: 7px 0;
+  border-bottom: 1px solid #334155;
+  font-size: 13px;
+}
+
+.toggle {
+  display: grid;
+  grid-template-columns: 42px 34px;
+  align-items: center;
+  gap: 8px;
+  font-size: 13px;
+  font-weight: 700;
+}
+
+.toggle input {
+  position: absolute;
+  width: 1px;
+  height: 1px;
+  margin: 0;
+  opacity: 0;
+}
+
+.toggle span[id$="-status"] {
+  width: 42px;
+  text-align: right;
+}
+
+.toggle-slider {
+  position: relative;
+  width: 34px;
+  height: 18px;
+  border-radius: 999px;
+  background: #475569;
+  transition: background 120ms ease;
+}
+
+.toggle-slider::before {
+  content: "";
+  position: absolute;
+  top: 3px;
+  left: 3px;
+  width: 12px;
+  height: 12px;
+  border-radius: 50%;
+  background: #ffffff;
+  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.25);
+  transition: transform 120ms ease;
+}
+
+.toggle input:checked ~ .toggle-slider {
+  background: #22c55e;
+}
+
+.toggle input:checked ~ .toggle-slider::before {
+  transform: translateX(16px);
+}
+
+.toggle input:focus-visible ~ .toggle-slider {
+  outline: 2px solid #3b82f6;
+  outline-offset: 2px;
+}
+
+.toggle input:disabled ~ .toggle-slider {
+  opacity: 0.65;
+}
+
+.evidence-retention {
+  display: grid;
+  gap: 10px;
+}
+
+.evidence-retention h2 {
+  margin: 0;
+  font-size: 13px;
+  font-weight: 700;
+}
+
+.maintenance-warning {
+  padding: 8px 10px;
+  border: 1px solid #3f6f56;
+  border-radius: 4px;
+  font-size: 12px;
+  font-weight: 700;
+  line-height: 1.35;
+  color: #bbf7d0;
+  background: #14251d;
+}
+
+.maintenance-warning[hidden] {
+  display: none;
+}
+
+.evidence-counts {
+  display: grid;
+  gap: 6px;
+  margin: 0;
+}
+
+.evidence-counts div {
+  display: grid;
+  grid-template-columns: 1fr auto;
+  align-items: baseline;
+  gap: 10px;
+  min-width: 0;
+}
+
+.evidence-counts dt {
+  margin: 0;
+  font-size: 12px;
+  color: #cbd5e1;
+}
+
+.evidence-counts dd {
+  margin: 0;
+  min-width: 28px;
+  font-size: 13px;
+  font-weight: 700;
+  text-align: right;
+  word-break: break-word;
+}
+
+.retention-status {
+  min-height: 16px;
+  font-size: 12px;
+  line-height: 1.35;
+  color: #cbd5e1;
+  word-break: break-word;
+}
+
+button {
+  width: 100%;
+  padding: 8px 10px;
+  border: 1px solid #475569;
+  border-radius: 4px;
+  font: inherit;
+  font-size: 13px;
+  color: #e5edf5;
+  background: #1f2937;
+}
+
+button:disabled {
+  cursor: default;
+  opacity: 0.65;
+}