feat(theming): settings-store, nav merge util and radius tokens

Phases 0-2 of docs/website/THEMING_AND_NAV.md. Groundwork only: no admin UI,
no consumer wiring, and an instance that never touches the new settings keys
renders exactly as it does today.

Phase 0 - settings store:
- settingsDb.remove() and DELETE /api/v1/admin/settings/:key, the "reset to
  default" primitive. Defaults for these keys live in BRAND_* env, theme.css
  and the hardcoded NAV arrays, so reset has to delete the row rather than
  store a copy of the default. Allowlisted to the five theming/nav keys plus
  hero_layout_draft, admin-only, idempotent.
- GET /api/v1/settings/nav behind requireAuth with no role gate. AdminLayout
  renders for editors and moderators and PlayerPortalLayout for players, and
  none of them can read GET /admin/settings, so without this their nav
  override would silently never apply.
- A fifth router group for it: /public is anonymous, /admin/settings is
  adminOnly, /player is self-scoped data. This is configuration that needs a
  login.
- parseJsonSetting() in utils/settingsJson.js. settings.value is TEXT, so
  every JSON key arrives as a string; malformed or wrong-shaped reads as
  absent, never as an error and never half-applied.
- theme_visual / brand_assets / nav_public join PUBLIC_KEYS; nav_admin and
  nav_player deliberately do not.

Phase 1 - client/src/lib/navOverrides.js, the pure merge util. Presentation
only: it can set label/order/hidden and (grouped navs) group, and nothing
else. It cannot introduce a `to`, cannot touch roles/feature, and hidden:false
cannot un-hide anything - the existing filters run afterward, unchanged, and
remain the boundary.

Phase 2 - promoted 23 border-radius literals in theme.css to four tokens at
today's values (14x8px, 4x999px, 4x10px, 1x12px). The 7px/6px editor chrome
and the two 50% circles stay literal. --shadow-card and --panel-grad were
already tokens.

Tests: 16 new server tests, 20 new client tests. The route-manifest guard now
also asserts /settings/** sits behind requireAuth. Swagger and both route
artifacts regenerated.

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

client/src/lib/navOverrides.js

@@ -0,0 +1,138 @@
+// Apply an admin's stored navigation overrides to a hardcoded NAV array.
+//
+// The three navs (public header, admin sidebar, player portal) stay declared in
+// code; this layer only reorders, relabels and hides what is already there.
+// See docs/website/THEMING_AND_NAV.md §7.
+//
+// **This is presentation, never authorization.** The override can carry
+// `label`, `order`, `hidden` and — admin nav only — `group`, and nothing else.
+// It cannot introduce a `to`, and it cannot touch `roles`, `feature`, `icon` or
+// `end`, so the existing role/feature filters in SiteHeader and AdminLayout run
+// *after* this merge, unchanged, and remain the actual boundary. An override
+// saying `hidden: false` on a role-gated item still shows nothing to a viewer
+// whose role check fails: hiding is subtractive here, never additive.
+//
+// Fail-safe throughout: anything unrecognized — an unknown `to`, a non-string
+// label, a group that does not exist — is ignored rather than rejected, so a
+// stale or hand-edited settings row degrades to the code default instead of
+// rendering a broken nav.
+
+// Two shapes are supported, because two exist:
+//   flat    [{ to, label, ... }]                      — public header, player portal
+//   grouped [{ title?, items: [{ to, label, ... }] }] — admin sidebar
+function isGrouped(nav) {
+  return nav.length > 0 && nav.every((g) => g && Array.isArray(g.items))
+}
+
+// A stored override entry is usable only field by field: a bad `label` must not
+// discard a good `order` alongside it.
+function cleanEntry(raw, groupTitles) {
+  if (!raw || typeof raw !== 'object' || Array.isArray(raw)) return null
+  const out = {}
+  if (typeof raw.label === 'string' && raw.label.trim()) out.label = raw.label.trim()
+  if (typeof raw.order === 'number' && Number.isFinite(raw.order)) out.order = raw.order
+  if (raw.hidden === true) out.hidden = true
+  // `group` may only name a section the base nav already declares. Anything else
+  // — a renamed group, a typo, an invented category — is dropped, so an item can
+  // never land in a header that does not exist.
+  if (typeof raw.group === 'string' && groupTitles.has(raw.group)) out.group = raw.group
+  return out
+}
+
+// Sort by effective order, where an item the admin never reordered keeps its
+// index in the base array as its key. Two tie-breaks, in order: an explicit
+// order beats a coincidental index (the admin said "first", so first), and two
+// explicit orders stay in code order (the sort is stable).
+//
+// In practice the editor writes an order for every item in a list, the way
+// drag-and-drop reordering does, so ties are the stale-row case rather than the
+// normal one. They still have to resolve predictably.
+function byOrder(items) {
+  return items
+    .map((item, index) => ({ item, key: item.__order ?? index, explicit: item.__order !== undefined }))
+    .sort((a, b) => a.key - b.key || Number(b.explicit) - Number(a.explicit))
+    .map(({ item }) => {
+      const { __order, ...rest } = item
+      return rest
+    })
+}
+
+// Apply label/hidden/order to one flat list. Returns visible items only, with
+// the sort key parked on `__order` for byOrder to consume.
+function mergeItems(items, entries) {
+  const out = []
+  for (const item of items) {
+    const o = entries.get(item.to)
+    if (o?.hidden) continue
+    // Spread the base item first so `to`, `roles`, `feature`, `icon` and `end`
+    // survive verbatim — the override only ever lands on `label`.
+    out.push({ ...item, ...(o?.label ? { label: o.label } : {}), __order: o?.order })
+  }
+  return out
+}
+
+/**
+ * @param {Array} baseNav  the hardcoded nav — the source of truth for `to`,
+ *   `roles`, `feature`, `icon` and `end`
+ * @param {object|null} overrides  the parsed settings JSON, keyed by `to`, or
+ *   null when the admin never touched this nav
+ * @returns {Array} a new array of the same shape, or `baseNav` itself when there
+ *   is nothing to apply
+ */
+export function applyNavOverrides(baseNav, overrides) {
+  if (!Array.isArray(baseNav)) return []
+  // The untouched path, and the one that matters most: no row, a malformed row,
+  // or a row with nothing usable in it all render the nav exactly as coded.
+  if (!overrides || typeof overrides !== 'object' || Array.isArray(overrides)) return baseNav
+
+  const grouped = isGrouped(baseNav)
+  const groupTitles = new Set(
+    grouped ? baseNav.map((g) => g.title).filter((t) => typeof t === 'string') : [],
+  )
+
+  // Keyed by `to`, and only for a `to` the base nav actually declares. An
+  // override for a route that no longer exists is dropped here, so deleting a
+  // route in code can never leave a dangling override that does something
+  // unexpected later.
+  const known = new Set(
+    grouped ? baseNav.flatMap((g) => g.items.map((i) => i.to)) : baseNav.map((i) => i.to),
+  )
+  const entries = new Map()
+  for (const [to, raw] of Object.entries(overrides)) {
+    if (!known.has(to)) continue
+    const entry = cleanEntry(raw, groupTitles)
+    if (entry && Object.keys(entry).length > 0) entries.set(to, entry)
+  }
+  if (entries.size === 0) return baseNav
+
+  if (!grouped) return byOrder(mergeItems(baseNav, entries))
+
+  // Grouped: an item may also be moved into another *existing* titled section.
+  // Groups keep their coded order — only membership and within-group order move.
+  const moved = new Map() // destination title → items pulled in from elsewhere
+  const kept = baseNav.map((g) => {
+    const items = []
+    for (const item of g.items) {
+      const o = entries.get(item.to)
+      if (o?.group && o.group !== g.title) {
+        if (!moved.has(o.group)) moved.set(o.group, [])
+        moved.get(o.group).push(item)
+        continue
+      }
+      items.push(item)
+    }
+    return { ...g, items }
+  })
+
+  return kept
+    .map((g) => ({
+      ...g,
+      items: byOrder(mergeItems([...g.items, ...(moved.get(g.title) || [])], entries)),
+    }))
+    // A group whose every item was hidden must not leave an orphaned header.
+    // AdminLayout drops empty groups again after its own role filter; doing it
+    // here too keeps the util correct on its own.
+    .filter((g) => g.items.length > 0)
+}
+
+export default applyNavOverrides

client/src/styles/theme.css

@@ -24,6 +24,22 @@
 
   --shadow-card: 0 14px 34px rgba(0, 0, 0, 0.3);
   --panel-grad: linear-gradient(180deg, var(--panel-a), var(--panel-b));
+
+  /* Corner radius, by the kind of surface rather than by the pixel value, so a
+     theme preset can restyle all of them at once (see
+     docs/website/THEMING_AND_NAV.md §4.7). Seeded at the values already in use
+     — this promotion is a no-op, and every existing instance must keep looking
+     exactly as it does today.
+
+     Deliberately four tokens, not three: .card/.panel are 10px and .panel-flat
+     is 12px, so collapsing them would have restyled every card on every
+     install. The 7px (.rte-btn) and 6px (.rte-linkmenu-item) values stay
+     literals — interior editor chrome, not brand surface — as do the 50%
+     circles, which are shapes rather than radii. */
+  --radius-pill: 999px;
+  --radius-panel: 12px;
+  --radius-card: 10px;
+  --radius-input: 8px;
 }
 
 * {
@@ -99,7 +115,7 @@ a {
   flex-direction: column;
   padding: 24px;
   border: 1px solid var(--line);
-  border-radius: 10px;
+  border-radius: var(--radius-card);
   text-decoration: none;
   color: var(--ink);
   background: var(--panel-grad);
@@ -123,19 +139,19 @@ a.card:focus-visible {
 }
 .panel {
   border: 1px solid var(--line);
-  border-radius: 10px;
+  border-radius: var(--radius-card);
   background: var(--panel-grad);
 }
 .panel-flat {
   border: 1px solid var(--line);
-  border-radius: 12px;
+  border-radius: var(--radius-panel);
   overflow: hidden;
   background: var(--panel-flat);
 }
 .note {
   border: 1px solid var(--line);
   border-left: 3px solid var(--accent);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   background: rgba(19, 36, 60, 0.4);
   padding: 18px 22px;
   color: var(--muted);
@@ -168,7 +184,7 @@ a.card:focus-visible {
 /* ===== Pills / buttons ===== */
 .pill {
   border: 1px solid var(--line);
-  border-radius: 999px;
+  border-radius: var(--radius-pill);
   padding: 7px 14px;
   color: var(--muted);
   background: rgba(11, 22, 48, 0.5);
@@ -186,7 +202,7 @@ a.card:focus-visible {
   outline: none;
 }
 .btn {
-  border-radius: 999px;
+  border-radius: var(--radius-pill);
   padding: 12px 26px;
   font-family: var(--sans);
   font-size: 0.92rem;
@@ -214,7 +230,7 @@ a.card:focus-visible {
   background: var(--blue);
 }
 .btn-sq {
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   padding: 10px 18px;
   font-size: 0.85rem;
 }
@@ -230,7 +246,7 @@ button[disabled] {
 .select {
   width: 100%;
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   padding: 11px 14px;
   background: var(--bg);
   color: var(--ink);
@@ -312,7 +328,7 @@ button[disabled] {
 }
 .prose img {
   max-width: 100%;
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   border: 1px solid var(--line);
 }
 
@@ -320,7 +336,7 @@ button[disabled] {
 .rte {
   position: relative;
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   background: var(--bg);
 }
 .rte:focus-within {
@@ -407,7 +423,7 @@ button[disabled] {
   width: min(360px, calc(100% - 20px));
   padding: 10px;
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   background: var(--panel-a);
   box-shadow: var(--shadow-card);
 }
@@ -449,7 +465,7 @@ button[disabled] {
   display: inline-block;
   padding: 3px 10px;
   border: 1px solid var(--line);
-  border-radius: 999px;
+  border-radius: var(--radius-pill);
   background: rgba(127, 153, 189, 0.1);
   color: var(--accent);
   font-family: var(--sans);
@@ -494,7 +510,7 @@ button[disabled] {
   width: 100%;
   padding: 8px 10px;
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   background: var(--panel-flat);
   color: var(--text);
   text-align: left;
@@ -532,7 +548,7 @@ button[disabled] {
   overflow-y: auto;
   padding: 12px 14px;
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   background: var(--bg);
 }
 .diff-add {
@@ -603,7 +619,7 @@ button[disabled] {
   vertical-align: middle;
 }
 .badge {
-  border-radius: 999px;
+  border-radius: var(--radius-pill);
   padding: 3px 11px;
   font-size: 0.72rem;
   font-weight: 700;
@@ -780,7 +796,7 @@ button[disabled] {
 }
 .page-image img {
   max-width: 100%;
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   border: 1px solid var(--line);
   display: block;
 }
@@ -863,7 +879,7 @@ button[disabled] {
 }
 .pb-column-editor {
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   padding: 12px;
   background: var(--panel-flat, transparent);
 }
@@ -881,7 +897,7 @@ button[disabled] {
 }
 .pb-subblock {
   border: 1px solid var(--line);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   padding: 10px;
   margin-top: 10px;
   background: var(--bg);
@@ -919,7 +935,7 @@ button[disabled] {
   border: 1px solid #6e3b38;
   background: rgba(110, 59, 56, 0.16);
   color: #e6a9a3;
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   padding: 10px 14px;
   margin-top: 14px;
   font-size: 0.86rem;
@@ -928,7 +944,7 @@ button[disabled] {
   border: 1px solid var(--accent);
   background: var(--blue);
   color: var(--accent-bright);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   padding: 8px 14px;
   margin-top: 14px;
   font-size: 0.86rem;
@@ -960,7 +976,7 @@ button[disabled] {
   gap: 8px;
   padding: 12px;
   border: 1px dashed var(--line);
-  border-radius: 10px;
+  border-radius: var(--radius-card);
   margin-bottom: 16px;
 }
 .pb-canvas {
@@ -970,7 +986,7 @@ button[disabled] {
 }
 .pb-block-card {
   border: 1px solid var(--line);
-  border-radius: 10px;
+  border-radius: var(--radius-card);
   background: var(--panel-flat, transparent);
 }
 .pb-block-card.is-dragging {
@@ -1082,7 +1098,7 @@ button[disabled] {
   border: 1px solid var(--accent);
   background: var(--blue);
   color: var(--accent-bright);
-  border-radius: 8px;
+  border-radius: var(--radius-input);
   padding: 8px 14px;
   margin-bottom: 20px;
   font-size: 0.85rem;