fix(ui): 电机前端回滚到 P1 拆分前，恢复 STATUS 离线层契约

根因：拆分后 renderStatusPanel 操作 #statusOffline/#statusPanel，
HTML 实际 id 是 offlineOverlay/statusLive，遮罩永不摘掉。
CSS/HTML 结构本就未重写；本提交恢复完整 main.js 与 dual-link 传输层。

js/motor/transport-wifi.js

@@ -22,29 +22,9 @@
  */
 "use strict";
 
-function bytesToHexStr(bytes) {
-  let s = "";
-  for (let i = 0; i < bytes.length; i++) {
-    s += bytes[i].toString(16).padStart(2, "0").toUpperCase();
-  }
-  return s;
-}
-function hexToBytes(hex) {
-  const clean = String(hex || "").replace(/[^0-9a-fA-F]/g, "");
-  const out = new Uint8Array(Math.floor(clean.length / 2));
-  for (let i = 0; i < out.length; i++) out[i] = parseInt(clean.substr(i * 2, 2), 16);
-  return out;
-}
-function u16LeAt(bytes, i) { return bytes[i] | (bytes[i + 1] << 8); }
-function canId(node, suffix) { return ((node & 0xF) << 16) | (suffix & 0xFFFF); }
-const ID_GET_NODE_ID = (n) => canId(n, 0x0401);
-const ID_SET_NODE_ID = (n) => canId(n, 0x0400);
-
 /** @description 创建 WiFi/HTTP 传输实例。 */
 export function createWifiTransport(ctx) {
   const { getBaseUrl, recordSlow, isTransient } = ctx;
-  const sendFrame = ctx.sendFrame;
-  const getCh = typeof ctx.getCh === "function" ? ctx.getCh : () => 0;
 
   /** 统一 GET JSON。失败抛 Error，附 status / transient（与原 fetchDeviceJson 一致）。 */
   async function getJson(path, timeoutMs) {
@@ -249,99 +229,6 @@ export function createWifiTransport(ctx) {
       return data.nodes.find((n) => n.node === node) || null;
     },
 
-    /**
-     * R5：版本等待下沉传输层。
-     * WiFi 走 GD32 缓存 /motor/version，按 seq 增长或 at>=sentAt 判新应答。
-     * 超时返回 null（与旧 waitMotorVersionOnTick 语义一致）。
-     */
-    async waitVersion(node, opts) {
-      const prevSeq = opts && opts.prevSeq;
-      const sentAt = (opts && opts.sentAt) || 0;
-      const timeoutMs = (opts && opts.timeoutMs) || 5000;
-      const deadline = Date.now() + timeoutMs;
-      const sampleOnce = async () => {
-        try {
-          const v = await getJson("/motor/version", 2000);
-          if (!v || !v.have_data || !Array.isArray(v.nodes)) return null;
-          const hit = v.nodes.find((n) => n.node === node) || null;
-          if (hit && hit.version &&
-              (prevSeq == null || hit.seq > prevSeq || (hit.at && hit.at >= sentAt))) {
-            return hit;
-          }
-        } catch (_) { /* 瞬时 busy 忽略 */ }
-        return null;
-      };
-      let v = await sampleOnce();
-      if (v) return v;
-      while (Date.now() < deadline) {
-        await new Promise((r) => setTimeout(r, 50));
-        v = await sampleOnce();
-        if (v) return v;
-      }
-      return null;
-    },
-
-    /**
-     * R5：节点参数 GET（0x000N0401 扩展格式）。
-     * 发送走注入的 sendOneFrameWhenFree（保持 main 流控）；回执走 GD32 per-ID 快照。
-     */
-    async queryNodeIdParam(node, selector) {
-      if (typeof sendFrame !== "function") return { ok: false, desc: "sendFrame 未注入" };
-      const bytes = new Uint8Array([selector & 0xFF, (selector >> 8) & 0xFF]);
-      const id = ID_GET_NODE_ID(node);
-      const res = await sendFrame(id, 2, bytesToHexStr(bytes));
-      if (!res.ok) {
-        return { ok: false, desc: res.desc || "发送失败", networkError: res.networkError, busy: res.busy };
-      }
-      let rb = null;
-      const r = res.results && res.results[0];
-      if (r && r.recv && r.recv_len >= 2) {
-        const b = hexToBytes(r.recv);
-        if (b.length === 2 || b.length === 4) rb = b;
-      }
-      if (!rb) {
-        await new Promise((r2) => setTimeout(r2, 80));
-        try {
-          const fb = await getJson("/can/feedback", 2500);
-          const ch = (fb && fb.channels) ? fb.channels[getCh()] : null;
-          if (ch && ch.valid && Array.isArray(ch.entries)) {
-            const hit = ch.entries.find((e) => e && Number(e.id) === id);
-            if (hit) rb = hexToBytes(hit.data);
-          }
-        } catch (_) {}
-      }
-      return parseParamReply(rb, selector);
-    },
-
-    /** R5：节点参数 SET（0x000N0400 扩展格式 DLC4）。 */
-    async setNodeIdParam(node, selector, value) {
-      if (typeof sendFrame !== "function") return { ok: false, desc: "sendFrame 未注入" };
-      const bytes = new Uint8Array([
-        selector & 0xFF, (selector >> 8) & 0xFF,
-        value & 0xFF, (value >> 8) & 0xFF,
-      ]);
-      const id = ID_SET_NODE_ID(node);
-      const res = await sendFrame(id, 4, bytesToHexStr(bytes));
-      if (!res.ok) {
-        return { ok: false, desc: res.desc || "发送失败", networkError: res.networkError, busy: res.busy };
-      }
-      let rb = null;
-      const r = res.results && res.results[0];
-      if (r && r.recv && r.recv_len >= 5) rb = hexToBytes(r.recv);
-      if (!rb) {
-        await new Promise((r2) => setTimeout(r2, 80));
-        try {
-          const fb = await getJson("/can/feedback", 2500);
-          const ch = (fb && fb.channels) ? fb.channels[getCh()] : null;
-          if (ch && ch.valid && Array.isArray(ch.entries)) {
-            const hit = ch.entries.find((e) => e && Number(e.id) === id);
-            if (hit) rb = hexToBytes(hit.data);
-          }
-        } catch (_) {}
-      }
-      return parseSetReply(rb, selector);
-    },
-
     /** 把前端刷新周期同步给 GD32（0xC5 主动推送周期），失败静默。 */
     async setPeriod(ms) {
       const v = Math.max(20, Math.min(65535, Math.round(ms)));
@@ -359,28 +246,3 @@ export function createWifiTransport(ctx) {
     async teardown() { /* no-op */ },
   };
 }
-
-function parseParamReply(rb, selector) {
-  if (!rb) return { ok: false, desc: "未收到应答（电机离线或未响应）" };
-  if (rb.length >= 4) {
-    const sel = u16LeAt(rb, 0), val = u16LeAt(rb, 2);
-    if (sel !== selector) {
-      return { ok: false, desc: `应答选择器不符（0x${sel.toString(16).padStart(4, "0")}）` };
-    }
-    return { ok: true, val };
-  }
-  if (rb.length === 2) return { ok: true, oldFw: true, val: u16LeAt(rb, 0) };
-  return { ok: false, desc: "应答格式异常" };
-}
-
-function parseSetReply(rb, selector) {
-  if (!rb) return { ok: false, desc: "未收到应答（电机离线或未响应）" };
-  if (rb.length >= 5) {
-    const st = rb[0], sel = u16LeAt(rb, 1);
-    if (sel !== selector) {
-      return { ok: false, desc: `应答选择器不符（0x${sel.toString(16).padStart(4, "0")}）` };
-    }
-    return st === 1 ? { ok: true } : { ok: false, desc: "电机 NACK（Flash 写入失败或参数非法）" };
-  }
-  return { ok: false, desc: "应答格式异常（电机固件不支持刷新率参数？需 v0.4.1+）" };
-}