refactor(P1): 5 项代码质量改进 — 消除重复、拆分巨型组件、统一基础设施

Task 4: 统一 amap.ts 为完整 API 客户端
- 扩展 amap.ts 为统一客户端（amapFetch 8s 超时 + 错误处理）
- 导出 searchPlaceText/searchPlaceAround/getInputTips/reverseGeocode/getTransitDirection
- 精简 4 个 location route 为单行调用，blindboxPlanGen 删除 ~80 行内联 API 代码

Task 2: 抽取 ShareCardShell 消除三兄弟重复
- 新建 ShareCardShell.tsx 共享外框/背景/品牌头/QR 底部
- RestaurantShareCard 406→268 行，BlindboxShareCard 341→173 行，BlindboxPlanShareCard 277→159 行

Task 3: 拆分 BlindboxPlan.tsx (742→371 行)
- 提取 planUtils.ts (guessCategory + formatDuration)
- 提取 PoiSearchField / SortablePlanItem / PlanItemEditModal 三个独立组件

Task 1: 拆分 blindbox/[code]/page.tsx 上帝组件 (1300→509 行)
- 提取 useBlindboxRoom / useBlindboxIdeas / useBlindboxPlan / useBlindboxDraw 四个 hooks
- 提取 BlindboxPoolPhase / BlindboxRevealPhase 两个子组件
- 主页面仅保留 phase 协调 + hook 组装 + 子组件渲染

Task 5: 统一 SWR 数据获取层
- 新建 fetcher.ts (FetchError 携带 status，401 不重试)
- 新建 useBlindboxRooms / useAchievements / useFavorites SWR hooks
- useRoomPolling 改用共享 fetcher
- blindbox 大厅/成就/个人中心页面删除手写 fetch 样板代码
- JWT 过期时自动弹出登录框而非反复重试

src/lib/blindboxPlanGen.ts

@@ -6,7 +6,7 @@
  * Fallback path: legacy pipeline (runLegacyPlanGeneration)
  */
 import { prisma } from "@/lib/prisma";
-import { requireAmapApiKey } from "@/lib/amap";
+import { searchPois, getTransitDirection } from "@/lib/amap";
 import { generateSchedule, runAgentLoop, type ScheduleContext, type AgentTool } from "@/lib/ai";
 import { ApiError } from "@/lib/api";
 
@@ -110,93 +110,6 @@ function selectIdeasForSlots(ideas: TaggedIdea[], availableHours: number): Tagge
   return selected;
 }
 
-// ---------------------------------------------------------------------------
-// Transit segment parser
-// ---------------------------------------------------------------------------
-
-function parseTransitSegments(
-  segments: Record<string, unknown>[],
-): { description: string; mode: string } {
-  const parts: string[] = [];
-  let hasSubway = false;
-  let hasBus = false;
-
-  for (const seg of segments) {
-    const bus = seg.bus as { buslines?: Record<string, unknown>[] } | undefined;
-    if (!bus?.buslines?.length) continue;
-    for (const line of bus.buslines) {
-      const rawName = String(line.name ?? "");
-      const name = rawName.replace(/\(.*?\)$/, "").trim(); // strip terminal info like "(上海南站--江杨北路)"
-      const viaNum = Number(line.via_num ?? 0);
-      const isSubway = String(line.type ?? "").includes("地铁") || String(line.type ?? "").includes("轨道");
-      if (isSubway) hasSubway = true; else hasBus = true;
-      const dep = (line.departure_stop as Record<string, unknown> | undefined)?.name;
-      const arr = (line.arrival_stop as Record<string, unknown> | undefined)?.name;
-      const stops = dep && arr ? ` ${dep}→${arr}` : "";
-      parts.push(viaNum > 0 ? `${name}${stops}(${viaNum}站)` : `${name}${stops}`);
-    }
-  }
-
-  const mode = hasSubway ? "地铁" : hasBus ? "公交" : "步行";
-  const description = parts.length > 0 ? parts.join(" → ") : mode;
-  return { description, mode };
-}
-
-// ---------------------------------------------------------------------------
-// POI search (shared by both paths)
-// ---------------------------------------------------------------------------
-
-export async function searchPois(
-  query: string,
-  searchType: string,
-  anchorLat: number,
-  anchorLng: number,
-): Promise<{ name: string; address: string; lat: number; lng: number; rating?: number }[]> {
-  const apiKey = requireAmapApiKey();
-
-  if (searchType === "category") {
-    const url = new URL("https://restapi.amap.com/v5/place/around");
-    url.searchParams.set("key", apiKey);
-    url.searchParams.set("location", `${anchorLng},${anchorLat}`);
-    url.searchParams.set("keywords", query);
-    url.searchParams.set("radius", "5000");
-    url.searchParams.set("show_fields", "business");
-    url.searchParams.set("page_size", "8");
-    const res = await fetch(url.toString());
-    const data = await res.json();
-    if (data.status !== "1" || !data.pois?.length) return [];
-    return mapPois(data.pois);
-  }
-
-  const url = new URL("https://restapi.amap.com/v5/place/text");
-  url.searchParams.set("key", apiKey);
-  url.searchParams.set("keywords", query);
-  url.searchParams.set("location", `${anchorLng},${anchorLat}`);
-  url.searchParams.set("show_fields", "business");
-  url.searchParams.set("page_size", "8");
-  const res = await fetch(url.toString());
-  const data = await res.json();
-  if (data.status !== "1" || !data.pois?.length) return [];
-  return mapPois(data.pois);
-}
-
-function mapPois(
-  pois: { name: string; address?: string; location?: string; business?: { rating?: string } }[],
-) {
-  return pois
-    .filter((p) => p.location)
-    .map((p) => {
-      const [lng, lat] = (p.location ?? "0,0").split(",").map(Number);
-      const ratingStr = p.business?.rating;
-      return {
-        name: p.name,
-        address: p.address || "",
-        lat,
-        lng,
-        rating: ratingStr && ratingStr !== "[]" ? parseFloat(ratingStr) || undefined : undefined,
-      };
-    });
-}
 
 // ---------------------------------------------------------------------------
 // Progress messages (kept for legacy path)
@@ -347,29 +260,16 @@ function buildAgentTools(
       required: ["origin_lat", "origin_lng", "dest_lat", "dest_lng"],
     },
     execute: async (args) => {
-      const oLat = Number(args.origin_lat);
-      const oLng = Number(args.origin_lng);
-      const dLat = Number(args.dest_lat);
-      const dLng = Number(args.dest_lng);
-      const apiKey = requireAmapApiKey();
-      const url = new URL("https://restapi.amap.com/v3/direction/transit/integrated");
-      url.searchParams.set("key", apiKey);
-      url.searchParams.set("origin", `${oLng},${oLat}`);
-      url.searchParams.set("destination", `${dLng},${dLat}`);
-      url.searchParams.set("city", city);
-      url.searchParams.set("cityd", city);
-      url.searchParams.set("output", "json");
       try {
-        const res = await fetch(url.toString());
-        const data = await res.json();
-        if (data.status !== "1" || !data.route?.transits?.length) {
-          return JSON.stringify({ error: "未找到公交路线" });
-        }
-        const transit = data.route.transits[0];
-        const durationMin = Math.ceil(Number(transit.duration) / 60);
-        const distanceKm = Math.round(Number(data.route.distance) / 100) / 10;
-        const { description, mode } = parseTransitSegments(transit.segments ?? []);
-        return JSON.stringify({ durationMin, distanceKm, description, mode });
+        const result = await getTransitDirection({
+          originLat: Number(args.origin_lat),
+          originLng: Number(args.origin_lng),
+          destLat: Number(args.dest_lat),
+          destLng: Number(args.dest_lng),
+          city,
+        });
+        if (!result) return JSON.stringify({ error: "未找到公交路线" });
+        return JSON.stringify(result);
       } catch (e) {
         console.error("getTravelTimeTool failed:", e);
         return JSON.stringify({ error: "路线查询失败" });
@@ -544,9 +444,12 @@ async function runLegacyPlanGeneration(
     }),
   );
 
+  const toCandidates = (pois: { name: string; address: string; lat: number; lng: number; rating?: number | null }[]) =>
+    pois.map((p) => ({ ...p, rating: p.rating ?? undefined }));
+
   const candidates: ScheduleContext["candidates"] = {};
   for (const result of searchResults) {
-    candidates[result.query] = result.pois;
+    candidates[result.query] = toCandidates(result.pois);
   }
 
   const catQueries = [...uniqueByQuery.values()].filter((i) => i.searchType === "category");
@@ -570,7 +473,7 @@ async function runLegacyPlanGeneration(
       }),
     );
     for (const result of catResults) {
-      candidates[result.query] = result.pois;
+      candidates[result.query] = toCandidates(result.pois);
     }
   }
 
@@ -626,7 +529,6 @@ async function runLegacyPlanGeneration(
 // ---------------------------------------------------------------------------
 
 async function queryTransit(
-  apiKey: string,
   oLng: number,
   oLat: number,
   dLng: number,
@@ -634,19 +536,15 @@ async function queryTransit(
   city: string,
 ): Promise<{ durationMin: number; description: string } | null> {
   try {
-    const url = new URL("https://restapi.amap.com/v3/direction/transit/integrated");
-    url.searchParams.set("key", apiKey);
-    url.searchParams.set("origin", `${oLng},${oLat}`);
-    url.searchParams.set("destination", `${dLng},${dLat}`);
-    url.searchParams.set("city", city);
-    url.searchParams.set("cityd", city);
-    url.searchParams.set("output", "json");
-    const res = await fetch(url.toString());
-    const data = await res.json();
-    if (data.status !== "1" || !data.route?.transits?.length) return null;
-    const transit = data.route.transits[0];
-    const { description } = parseTransitSegments(transit.segments ?? []);
-    return { durationMin: Math.ceil(Number(transit.duration) / 60), description };
+    const result = await getTransitDirection({
+      originLat: oLat,
+      originLng: oLng,
+      destLat: dLat,
+      destLng: dLng,
+      city,
+    });
+    if (!result) return null;
+    return { durationMin: result.durationMin, description: result.description };
   } catch (e) {
     console.error("queryTransit failed:", e);
     return null;
@@ -669,7 +567,6 @@ async function enrichTransitInfo(
   homeLat: number,
   homeLng: number,
 ): Promise<void> {
-  const apiKey = requireAmapApiKey();
   const cityParam = city || "上海";
 
   for (const day of days) {
@@ -680,7 +577,7 @@ async function enrichTransitInfo(
       const dLat = Number(items[0].lat);
       const dLng = Number(items[0].lng);
       if (dLat && dLng) {
-        const result = await queryTransit(apiKey, homeLng, homeLat, dLng, dLat, cityParam);
+        const result = await queryTransit(homeLng, homeLat, dLng, dLat, cityParam);
         if (result) {
           day.transitFromStart = result.durationMin;
           day.transitFromStartDescription = result.description;
@@ -695,7 +592,7 @@ async function enrichTransitInfo(
       const dLat = Number(items[i + 1].lat);
       const dLng = Number(items[i + 1].lng);
       if (!oLat || !oLng || !dLat || !dLng) continue;
-      const result = await queryTransit(apiKey, oLng, oLat, dLng, dLat, cityParam);
+      const result = await queryTransit(oLng, oLat, dLng, dLat, cityParam);
       if (result) {
         items[i].transitToNext = result.durationMin;
         items[i].transitDescription = result.description;
@@ -708,7 +605,7 @@ async function enrichTransitInfo(
       const oLat = Number(last.lat);
       const oLng = Number(last.lng);
       if (oLat && oLng) {
-        const result = await queryTransit(apiKey, oLng, oLat, homeLng, homeLat, cityParam);
+        const result = await queryTransit(oLng, oLat, homeLng, homeLat, cityParam);
         if (result) {
           day.transitToEnd = result.durationMin;
           day.transitToEndDescription = result.description;