fix(home): server-owned growth window; expose days

Home omits growth_days; backend auto (or home_growth_days 1/7) picks
the window. Response includes days alongside growth_days. Growth榜 link
uses the returned days. Non-growth sorts treat omitted/auto as 7.

reaction_board/web/queries.py

@@ -699,7 +699,7 @@ class DashboardQueries:
         sort: str = "heat",
         within_days: int | None = None,
         year: int | None = None,
-        growth_days: int | str = 7,
+        growth_days: int | str = "auto",
         folder_id: int | None = None,
         q: str | None = None,
         page: int = 1,
@@ -734,7 +734,7 @@ class DashboardQueries:
         sort: str = "heat",
         within_days: int | None = None,
         year: int | None = None,
-        growth_days: int | str = 7,
+        growth_days: int | str = "auto",
         folder_id: int | None = None,
         q: str | None = None,
         page: int = 1,
@@ -742,24 +742,29 @@ class DashboardQueries:
     ) -> dict[str, Any]:
         if sort not in VIDEO_SORTS:
             raise ValueError(f"不支持的排序: {sort}")
+        # auto：仅增长类排序由服务端选窗（配置 home_growth_days；默认先 7 再降 1）。
+        # 首页应省略 growth_days，勿自行探查。其它排序把 auto 当作 7（兼容旧默认）。
         if growth_days == "auto":
-            preferred = self.config_store.get().analytics.home_growth_days
-            if preferred in (1, 7):
-                growth_days = int(preferred)
+            if sort in {"growth", "growth_rate"}:
+                preferred = self.config_store.get().analytics.home_growth_days
+                if preferred in (1, 7):
+                    growth_days = int(preferred)
+                else:
+                    trial = self._list_videos_uncached(
+                        sort=sort,
+                        within_days=within_days,
+                        year=year,
+                        growth_days=7,
+                        folder_id=folder_id,
+                        q=q,
+                        page=page,
+                        page_size=page_size,
+                    )
+                    if trial.get("available") and int(trial.get("total") or 0) > 0:
+                        return trial
+                    growth_days = 1
             else:
-                trial = self._list_videos_uncached(
-                    sort=sort,
-                    within_days=within_days,
-                    year=year,
-                    growth_days=7,
-                    folder_id=folder_id,
-                    q=q,
-                    page=page,
-                    page_size=page_size,
-                )
-                if trial.get("available") and int(trial.get("total") or 0) > 0:
-                    return trial
-                growth_days = 1
+                growth_days = 7
         growth_days = int(growth_days)
         if growth_days < 1 or growth_days > 365:
             raise ValueError("growth_days 必须在 1~365 之间")
@@ -942,6 +947,8 @@ class DashboardQueries:
                 "within_days": within_days,
                 "year": year,
                 "growth_days": growth_days,
+                # days：与 growth_days 同步；首页 auto 时为 1|7，供前端链接/展示
+                "days": growth_days,
                 "page": page,
                 "page_size": page_size,
                 "total": total,

reaction_board/web/server.py

@@ -650,11 +650,10 @@ def _year_param(query: Mapping[str, list[str]]) -> int | None:
 
 
 def _growth_days_param(query: Mapping[str, list[str]]) -> int | str:
-    """榜单传 1~365；首页可传 auto（由查询层按 home_growth_days 解析）。"""
+    """省略或 auto：查询层按 home_growth_days 解析（默认 7→1）。
+    榜单应显式传 1~365。"""
     raw = _optional_str(query, "growth_days")
-    if raw is None:
-        return 7
-    if raw == "auto":
+    if raw is None or raw == "auto":
         return "auto"
     try:
         value = int(raw)

reaction_board/web/static/views/home.js

@@ -47,8 +47,8 @@ export async function renderHome(root) {
     api("/api/overview"),
     api("/api/videos", { sort: "published", within_days: 14, limit: 6 }),
     api("/api/videos", { sort: "heat", limit: 6 }),
-    // auto：服务端按 analytics.home_growth_days 解析；默认先试 7 天再降到 1 天
-    api("/api/videos", { sort: "growth", growth_days: "auto", limit: 6 }),
+    // 不带天数：后端按 home_growth_days（默认 auto：有 7 日则 7，否则 1）决定，响应带 days
+    api("/api/videos", { sort: "growth", limit: 6 }),
   ]);
 
   const fans = overview.fans;
@@ -60,7 +60,8 @@ export async function renderHome(root) {
   const pending = overview.counts?.candidates_pending || 0;
   // 候选提示仅对已登录（或未启用鉴权）用户可见，访客不展示运行期信息。
   const showCandidates = pending > 0 && canAccessProtected();
-  const growthDays = Number(growth.growth_days) || 1;
+  // 以后端返回的 days（与 growth_days 同步）为准，避免前端再探查
+  const growthDays = Number(growth.days ?? growth.growth_days) || 1;
   const growthLabel = `近 ${growthDays} 日`;
   const growthEmptyTitle = growth.reason
     || `近 ${growthDays} 日增长暂不可用`;