Accounts with limits: a Newznab key and a tier per user, daily API and NZB counts, invites

ACCESS=accounts (config/access.ts; open stays the default and behaves as
before): Newznab and the catalog's releases routes name a user (apikey or
the web interface's token), whose tier sets searches and NZBs per UTC day
(Newznab 500/501, the catalog 429) and how far back they see (102/403).
Counted in one upsert per use, so the last one can't be taken twice;
caps, stats and refused requests aren't counted. Signup takes an invite
(SIGNUP), which may give a tier; ace access:invite, access:tier (extends a
running tier), access:suspend. The web interface signs in and shows the
day's usage and the Newznab key.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

public/app.css

@@ -891,3 +891,129 @@ kbd {
   margin-top: 4px;
   color: var(--faint);
 }
+
+/* --- Account (ACCESS=accounts) ------------------------------------------ */
+
+.account-button {
+  height: 32px;
+  padding: 0 12px;
+  font-size: 13px;
+}
+
+.account-button .tier {
+  color: var(--accent);
+  text-transform: uppercase;
+  font-size: 11px;
+  letter-spacing: 0.04em;
+}
+
+.dialog {
+  width: min(420px, calc(100vw - 32px));
+  padding: 0;
+  border: 1px solid var(--border);
+  border-radius: var(--radius);
+  background: var(--surface);
+  color: var(--text);
+  box-shadow: var(--shadow);
+}
+
+.dialog::backdrop {
+  background: rgba(10, 14, 20, 0.35);
+}
+
+.dialog-head {
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  padding: 14px 18px;
+  border-bottom: 1px solid var(--border);
+}
+
+.dialog-head h2 {
+  margin: 0;
+  font-size: 16px;
+}
+
+.dialog-body {
+  padding: 18px;
+}
+
+.form {
+  display: grid;
+  gap: 12px;
+}
+
+.form label {
+  display: grid;
+  gap: 4px;
+  font-size: 13px;
+  color: var(--muted);
+}
+
+.form input {
+  height: 38px;
+  padding: 0 10px;
+  border: 1px solid var(--border);
+  border-radius: 8px;
+  background: var(--bg);
+  color: var(--text);
+  font-size: 14px;
+}
+
+.form input:focus {
+  outline: 2px solid var(--accent-soft);
+  border-color: var(--accent);
+}
+
+.form .button {
+  justify-content: center;
+}
+
+.form-switch {
+  margin: 4px 0 0;
+  font-size: 13px;
+  color: var(--muted);
+  text-align: center;
+}
+
+.form-error {
+  margin: 0;
+  color: var(--bad);
+  font-size: 13px;
+}
+
+.api-key {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+  margin-bottom: 18px;
+}
+
+.api-key code {
+  flex: 1;
+  min-width: 0;
+  padding: 8px 10px;
+  border-radius: 8px;
+  background: var(--bg);
+  font-family: var(--mono);
+  font-size: 12.5px;
+  overflow-wrap: anywhere;
+}
+
+.meter {
+  height: 6px;
+  margin-top: 4px;
+  border-radius: 3px;
+  background: var(--border);
+  overflow: hidden;
+}
+
+.meter span {
+  display: block;
+  height: 100%;
+  background: var(--accent);
+}
+
+.meter-full span {
+  background: var(--bad);
+}