feat(devices): radar presence input + button-light output on the controller

Model the entry button (I1) and a Hikvision radar (I2) as named children of the
access controller, and drive the button's 12V lamp on a spare relay.

- Radar = the existing relays[].presenceInput one-car-one-ticket gate, now labelled
  presenceKind: loop|radar. A radar may idle opposite the button, so add a per-input
  active-level override: relays[].presenceActiveLow -> driver inputActiveLow set,
  inverting just that terminal (pure helper inputActive()). The Dingtian has one
  board-wide resting level otherwise.
- AuxOutputDevice.setAux(channel,on) capability on the device interface (Dingtian
  latch) so business logic drives a NON-barrier lamp through the interface. Barriers
  still only pulseOpen — barrier-not-a-door preserved.
- ButtonLightController: subscribes to the radar input edge + the camera lane status
  and drives a 3-state lamp — radar+car=solid, radar-only=blink (~1Hz), else off.
  Fails OFF on host loss/error; de-duped. A radar detection never opens a barrier on
  its own (advisory; threat model).
- SetupWizard: presence kind + active-low + a button-light relay picker; sq+en i18n.

Tests: button-light.test.ts (truth table + blink + fail-OFF + de-dupe),
access-dingtian.test.ts (active-level inversion). Workspace build+lint+test green
(158 server tests). Wiki: hikvision-radar, button-light-indicator + updates.

Claude-Session: https://claude.ai/code/session_01Xcm6ikLgGoCxxHrxtjkk5V

apps/server/src/device-resolve.ts

@@ -33,12 +33,32 @@ export interface RelaySpec {
    * Both absent = no guard (legacy behaviour). See wiki/concepts/entry-double-press.md.
    */
   readonly presenceInput?: number;
+  /** What kind of sensor is on `presenceInput` — an induction LOOP or a RADAR. Label
+   *  only (the gate behaviour is identical); drives UI copy + telemetry. Default loop. */
+  readonly presenceKind?: "loop" | "radar";
+  /** The presence terminal's ACTIVE level is LOW (idles HIGH). Maps to the driver's
+   *  per-input `inputActiveLow` override so a radar wired opposite the button reads
+   *  right. See wiki/entities/hikvision-radar.md. */
+  readonly presenceActiveLow?: boolean;
   readonly entryCooldownSec?: number;
 }
 
+/** A non-barrier indicator lamp wired to a spare relay (e.g. the entry button's
+ *  12 V light). Driven by the server LightController off the radar + lane status —
+ *  NOT a barrier. See wiki/concepts/button-light-indicator.md. */
+export interface ButtonLightSpec {
+  /** 1-based spare relay channel the lamp is wired to. */
+  readonly relay: number;
+  /** Blink cadence (ms on / ms off) for the radar-only state. Default 500/500. */
+  readonly blinkOnMs?: number;
+  readonly blinkOffMs?: number;
+}
+
 /** Access controller config (the `relays[]` map + connection fields). */
 interface AccessConfig {
   readonly relays?: RelaySpec[];
+  /** Optional button-lamp output on a spare relay. */
+  readonly buttonLight?: ButtonLightSpec;
   readonly [k: string]: unknown;
 }
 
@@ -60,9 +80,11 @@ export interface ResolvedRelay {
   readonly controller: DeviceRow;
   readonly relay: number;
   readonly direction: Direction;
-  /** 1-based presence-loop input gating this relay's entry (when wired). */
+  /** 1-based presence input gating this relay's entry (loop or radar, when wired). */
   readonly presenceInput?: number;
-  /** Cooldown seconds suppressing repeat presses (fallback when no presence loop). */
+  /** Sensor kind on the presence input (loop|radar) — telemetry/label only. */
+  readonly presenceKind?: "loop" | "radar";
+  /** Cooldown seconds suppressing repeat presses (fallback when no presence input). */
   readonly entryCooldownSec?: number;
 }
 
@@ -102,6 +124,7 @@ export function relayForButton(db: Db, controllerId: string, terminal: number):
     relay: spec.relay,
     direction: spec.direction,
     presenceInput: spec.presenceInput,
+    presenceKind: spec.presenceKind ?? "loop",
     entryCooldownSec: spec.entryCooldownSec,
   };
 }
@@ -122,7 +145,20 @@ export function relayForPresence(db: Db, controllerId: string, terminal: number)
   const spec = relaysOf(row).find((r) => r.presenceInput === terminal);
   if (!spec) return null;
   if (spec.direction !== "entry" && spec.direction !== "both") return null;
-  return { controller: row, relay: spec.relay, direction: spec.direction };
+  return {
+    controller: row,
+    relay: spec.relay,
+    direction: spec.direction,
+    presenceInput: spec.presenceInput,
+    presenceKind: spec.presenceKind ?? "loop",
+  };
+}
+
+/** The button-lamp output declared on an access controller, or null. */
+export function buttonLightOf(row: DeviceRow): ButtonLightSpec | null {
+  const cfg = row.config as AccessConfig;
+  const bl = cfg.buttonLight;
+  return bl && typeof bl.relay === "number" ? bl : null;
 }
 
 /**