docs: expand configuration docs for admin and BadgerDB

Update README to explain startup config precedence (defaults/env/admin overrides),
document admin/bootstrap and feature toggles, and clarify storage locations under
WARPBOX_DATA_DIR including BadgerDB metadata. Also refresh project layout to
include new config and metastore packages.docs: expand configuration docs for admin and BadgerDB

Update README to explain startup config precedence (defaults/env/admin overrides),
document admin/bootstrap and feature toggles, and clarify storage locations under
WARPBOX_DATA_DIR including BadgerDB metadata. Also refresh project layout to
include new config and metastore packages.

static/css/admin.css

@@ -0,0 +1,106 @@
+body {
+    min-height: 100vh;
+}
+
+.admin-window {
+    width: min(1120px, calc(100vw - 32px));
+    margin: 32px auto;
+}
+
+.admin-panel {
+    display: grid;
+    gap: 16px;
+    padding: 16px;
+}
+
+.admin-nav {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+    align-items: center;
+}
+
+.admin-spacer {
+    flex: 1;
+}
+
+.admin-grid {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
+    gap: 12px;
+}
+
+.admin-link {
+    min-height: 88px;
+    padding: 12px;
+    color: inherit;
+    text-decoration: none;
+}
+
+.admin-link strong,
+.admin-link span {
+    display: block;
+}
+
+.admin-link span {
+    margin-top: 8px;
+}
+
+.admin-table {
+    width: 100%;
+    border-collapse: collapse;
+    background: #fff;
+}
+
+.admin-table th,
+.admin-table td {
+    padding: 8px;
+    border: 1px solid #808080;
+    text-align: left;
+    vertical-align: top;
+}
+
+.admin-form {
+    display: grid;
+    gap: 10px;
+}
+
+.admin-form-row {
+    display: grid;
+    gap: 4px;
+}
+
+.admin-form-row input,
+.admin-form-row textarea,
+.admin-form-row select {
+    width: 100%;
+    box-sizing: border-box;
+}
+
+.admin-checks {
+    display: grid;
+    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
+    gap: 8px;
+}
+
+.admin-checks label {
+    display: flex;
+    gap: 6px;
+    align-items: center;
+}
+
+.admin-error {
+    padding: 8px;
+    border: 1px solid #800;
+    background: #ffdede;
+}
+
+.admin-summary {
+    display: flex;
+    flex-wrap: wrap;
+    gap: 8px;
+}
+
+.admin-summary span {
+    padding: 6px 8px;
+}