feat(ui): static shell + router + api wrapper

Three-column grid (sidebar / main / right rail) with Cradle aesthetic:
blackflame accent on Cinzel display headings + Cormorant Garamond body
in cards, system UI for chrome. Hash-based router covers all entity
routes plus search, inbox, sacred-valley. api.js stores OWNER_TOKEN in
localStorage and prompts via a modal on 401. dom.js provides safe el()
+ mount() builders so no component ever assigns innerHTML from API data
(the only exception is an explicit, scary-named html: opt-in for
sanitizer output, used later by the markdown editor).

state.js is a tiny event bus for shared chrome state (pending count).
Components and views are loaded as ES modules — sidebar / topbar /
rightrail + 9 view stubs that the later Phase E tasks fill in.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

public/style.css

@@ -0,0 +1,141 @@
+/* Void 2.0 — Cradle / blackflame palette. Three-column grid shell. */
+:root {
+  --bg:        #0a0a0e;
+  --panel:     #14141c;
+  --panel-2:   #1c1c26;
+  --border:    #2a2a36;
+  --text:      #e8e6ed;
+  --muted:     #888094;
+  --accent:    #ff4f2e;        /* blackflame */
+  --accent-dim:#7a2716;
+  --accent-soft:#3a1610;
+  --ok:        #6fa86a;
+  --warn:      #d4a04a;
+  --bad:       #c45a4a;
+
+  --topbar-h:    48px;
+  --sidebar-w:   280px;
+  --rail-w:      360px;
+  --rail-w-min:  40px;
+
+  --font-display: 'Cinzel', 'Cormorant Garamond', serif;
+  --font-body:    'Cormorant Garamond', Georgia, serif;
+  --font-ui:      system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
+  --font-mono:    'JetBrains Mono', 'SF Mono', Consolas, monospace;
+}
+
+* { box-sizing: border-box; }
+html, body { margin: 0; padding: 0; height: 100%; background: var(--bg); color: var(--text); font-family: var(--font-ui); font-size: 14px; }
+
+#shell {
+  display: grid;
+  grid-template-columns: var(--sidebar-w) 1fr var(--rail-w);
+  grid-template-rows: var(--topbar-h) 1fr;
+  grid-template-areas:
+    "topbar topbar topbar"
+    "sidebar main rail";
+  height: 100vh;
+  width: 100vw;
+}
+#shell.rail-collapsed { grid-template-columns: var(--sidebar-w) 1fr var(--rail-w-min); }
+
+#topbar   { grid-area: topbar;  border-bottom: 1px solid var(--border); background: var(--panel); display: flex; align-items: center; padding: 0 16px; gap: 12px; }
+#sidebar  { grid-area: sidebar; border-right:  1px solid var(--border); background: var(--panel); overflow-y: auto; padding: 12px 0; }
+#main     { grid-area: main;    overflow-y: auto; padding: 24px 32px; }
+#rightrail{ grid-area: rail;    border-left:   1px solid var(--border); background: var(--panel); overflow: hidden; display: flex; flex-direction: column; }
+
+/* topbar */
+.brand { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.18em; font-size: 13px; color: var(--accent); text-transform: uppercase; padding: 0 6px; }
+.topbar-search { flex: 1; max-width: 520px; }
+.topbar-search input {
+  width: 100%; background: var(--bg); border: 1px solid var(--border); color: var(--text);
+  padding: 7px 10px; border-radius: 4px; font-family: var(--font-ui); font-size: 13px; outline: none;
+}
+.topbar-search input:focus { border-color: var(--accent-dim); }
+.topbar-spacer { flex: 1; }
+.icon-btn { background: transparent; border: 1px solid var(--border); color: var(--text); padding: 5px 10px; border-radius: 4px; cursor: pointer; font-size: 12px; }
+.icon-btn:hover { border-color: var(--accent-dim); color: var(--accent); }
+.badge {
+  display: inline-block; min-width: 16px; padding: 1px 5px; border-radius: 8px;
+  background: var(--accent); color: var(--bg); font-size: 10px; font-weight: 700; text-align: center; margin-left: 4px;
+}
+
+/* sidebar */
+.sb-section { padding: 8px 12px; }
+.sb-title { font-family: var(--font-display); font-size: 10px; letter-spacing: 0.16em; color: var(--muted); text-transform: uppercase; padding: 6px 4px; }
+.sb-item {
+  display: flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: 3px; cursor: pointer;
+  color: var(--text); text-decoration: none; font-size: 13px;
+}
+.sb-item:hover { background: var(--panel-2); }
+.sb-item.active { background: var(--accent-soft); color: var(--accent); }
+.sb-item .caret { color: var(--muted); width: 10px; text-align: center; font-size: 10px; }
+.sb-children { padding-left: 18px; }
+
+/* rightrail */
+.rail-toggle {
+  height: var(--topbar-h); border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: center;
+  cursor: pointer; color: var(--muted); font-size: 11px;
+}
+.rail-body { flex: 1; padding: 14px 14px; overflow-y: auto; font-size: 13px; color: var(--muted); }
+#shell.rail-collapsed .rail-body { display: none; }
+
+/* main / views */
+.view-h1 { font-family: var(--font-display); font-size: 26px; font-weight: 500; letter-spacing: 0.04em; margin: 0 0 4px; color: var(--text); }
+.view-sub { color: var(--muted); margin-bottom: 24px; font-family: var(--font-body); font-size: 15px; }
+.card {
+  background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 16px 18px; margin-bottom: 12px;
+}
+.card h3 { font-family: var(--font-display); font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; margin: 0 0 10px; color: var(--accent); font-weight: 500; }
+.row { display: flex; gap: 16px; }
+.row > * { flex: 1; min-width: 0; }
+.muted { color: var(--muted); }
+.kbd { font-family: var(--font-mono); background: var(--panel-2); padding: 1px 6px; border: 1px solid var(--border); border-radius: 3px; font-size: 11px; }
+pre, code { font-family: var(--font-mono); font-size: 12px; }
+pre { background: var(--panel-2); border: 1px solid var(--border); padding: 10px 12px; border-radius: 4px; overflow-x: auto; }
+a { color: var(--accent); text-decoration: none; }
+a:hover { text-decoration: underline; }
+hr { border: none; border-top: 1px solid var(--border); margin: 18px 0; }
+
+/* form */
+input[type=text], input[type=password], textarea, select {
+  background: var(--bg); border: 1px solid var(--border); color: var(--text);
+  padding: 6px 8px; border-radius: 3px; font-family: var(--font-ui); font-size: 13px; outline: none;
+}
+input:focus, textarea:focus, select:focus { border-color: var(--accent-dim); }
+button.primary {
+  background: var(--accent-dim); color: var(--text); border: 1px solid var(--accent); padding: 6px 14px;
+  border-radius: 3px; cursor: pointer; font-family: var(--font-ui); font-size: 13px;
+}
+button.primary:hover { background: var(--accent); color: var(--bg); }
+button.ghost {
+  background: transparent; color: var(--muted); border: 1px solid var(--border); padding: 6px 12px;
+  border-radius: 3px; cursor: pointer; font-size: 13px;
+}
+button.ghost:hover { color: var(--text); border-color: var(--accent-dim); }
+
+/* modal */
+.modal-backdrop { position: fixed; inset: 0; background: rgba(0,0,0,0.6); display: flex; align-items: center; justify-content: center; z-index: 100; }
+.modal {
+  background: var(--panel); border: 1px solid var(--border); border-radius: 6px; padding: 22px 24px; min-width: 380px; max-width: 520px;
+}
+.modal h2 { font-family: var(--font-display); font-size: 18px; margin: 0 0 12px; color: var(--accent); letter-spacing: 0.06em; }
+.modal .actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 16px; }
+
+/* lists */
+ul.plain { list-style: none; padding: 0; margin: 0; }
+ul.plain li { padding: 6px 0; border-bottom: 1px solid var(--border); }
+ul.plain li:last-child { border-bottom: none; }
+
+/* badges (status) */
+.status { display: inline-block; padding: 1px 6px; border-radius: 8px; font-size: 10px; text-transform: uppercase; letter-spacing: 0.08em; border: 1px solid var(--border); color: var(--muted); }
+.status.ok    { color: var(--ok);   border-color: var(--ok); }
+.status.warn  { color: var(--warn); border-color: var(--warn); }
+.status.bad   { color: var(--bad);  border-color: var(--bad); }
+.status.idle  { color: var(--muted); }
+
+/* search results */
+.search-group { margin-bottom: 22px; }
+.search-group .group-h { font-family: var(--font-display); font-size: 11px; letter-spacing: 0.18em; color: var(--accent); text-transform: uppercase; margin-bottom: 6px; }
+.search-hit { padding: 8px 10px; border: 1px solid var(--border); border-radius: 3px; margin-bottom: 6px; background: var(--panel); }
+.search-hit .hit-meta { color: var(--muted); font-size: 11px; }