feat(ui): M6.38批 — P1 MD3细化(SDK对话框28)+批②底部上滑回桌面+批6 ncm顶栏回播放页+批④面板后台列表+launcher UI微调(歌词页黑半透明底/播放页布局下移)+封面空artwork保留修复

- P1: meow_ui_dialog.c 对话框底框 radius_card→MEOW_SHAPE_EXTRA_LARGE(28) 三处(:103填充/:104描边/:361 BottomSheet); meow_ui_widgets.h 新增 MEOW_SHAPE_EXTRA_LARGE 28 宏; TextField/FAB/Slider/Progress 按设计文档保留
- 批②: np_gesture.h 新增 NP_GEST_HOME+np_home_gesture(底部热区上滑,与左缘返回对称互斥); now_playing.c 新增 np_draw_home_bar(屏底左缘pill指示条)+手势衔接; test_now_playing_widgets G5b
- 批6: ncm home.c 顶栏加回播放页按钮(MEOW_ICON_QUEUE_MUSIC)→push(ACT_PLAYER), 无音频也生效
- 批④: meowpanel /api/ams/bg 只读端点+前端后台列表页+杀/清复用kill通道
- UI微调: now_playing.c 播放页布局宏下移(NP_COVER_Y 84/NP_BTN_Y 612消底部留白)+歌词页背景统一黑色半透明叠层(弃封面取色底,删 np_draw_lyric_coverbg)
- 封面保留: now_playing.c/notif_center.c 空artwork保留上一张已解码封面(防暂停/开歌单致META报空artwork后封面闪没); test_np_cover C2断言更新+mirror同步

0warning;宿主测试 test_np_cover ALL PASS;launcher/ncm/panel 宿主测试无回归。二进制留批量批次未入库

patch_v2/meow_launcherd/notif_center.c

@@ -900,6 +900,7 @@ static void ncp_media_cover_load(const meow_media_session_t *s)
 {
     if (!s) return;
     if (strcmp(g_ncp_media_cover_path, s->artwork) == 0) return;
+    if (!s->artwork[0]) return;   /* 用户 2026-09-04：空 artwork 保留上一张媒体卡封面（勿清，防暂停/开歌单后封面闪没） */
     if (g_ncp_media_cover) { meow_img_free(g_ncp_media_cover); g_ncp_media_cover = NULL; }
     ncp_strncpy(g_ncp_media_cover_path, s->artwork, sizeof g_ncp_media_cover_path);
     if (!s->artwork[0]) return;

patch_v2/meow_launcherd/now_playing.c

@@ -17,20 +17,28 @@
 
 #define NP_COVER     300          /* 封面边长（方，居中） */
 #define NP_COVER_X   ((fb_xres - NP_COVER) / 2)
-#define NP_COVER_Y   60
+#define NP_COVER_Y   84            /* 用户 2026-09-04：控件组整体下移，消除底部大留白 */
-#define NP_TITLE_Y   412
+#define NP_TITLE_Y   436
-#define NP_ARTIST_Y  450
+#define NP_ARTIST_Y  476
-#define NP_ALBUM_Y   480
+#define NP_ALBUM_Y   508
 #define NP_PROG_X    40
 #define NP_PROG_W    (fb_xres - 80)
-#define NP_PROG_Y    518
+#define NP_PROG_Y    548
-#define NP_TIME_Y    492
+#define NP_TIME_Y    526
-#define NP_BTN_Y     568          /* 控制按钮中心 y */
+#define NP_BTN_Y     612          /* 控制按钮中心 y */
 #define NP_PLAY_CX   (fb_xres / 2)
 #define NP_PREV_CX   (NP_PLAY_CX - 78)
 #define NP_NEXT_CX   (NP_PLAY_CX + 78)
 #define NP_PLAY_R    30
 #define NP_PREV_R    22
+/* 批② home 指示条（底部上滑回桌面）：位于屏底左缘、避开左缘返回区（NP_EDGE_W=24）。
+ * 与 np_gesture.h np_home_gesture 的起滑区一致（down_x>=NP_EDGE_W 才认 home），保证
+ * 「指示条可触发手势」自洽。y 距屏底 16px，高 6px（镜像 SDK meow_ui_swipe_hint 提示线高一档）。
+ */
+#define NP_HOME_BAR_X  (NP_EDGE_W + 8)   /* 左缘 32：紧贴左缘返回区右侧 */
+#define NP_HOME_BAR_W  48
+#define NP_HOME_BAR_H  6
+#define NP_HOME_BAR_Y  (fb_yres - 16)
 
 static meow_img *g_np_cover = NULL;
 static char      g_np_cover_path[200] = "";
@@ -59,6 +67,8 @@ static void np_cover_load(const meow_media_session_t *s)
 {
     if (!s) return;
     if (g_np_cover && strcmp(g_np_cover_path, s->artwork) == 0) return;  /* 已载且未变 → 跳过 */
+    if (!s->artwork[0]) return;   /* 用户 2026-09-04：空 artwork（如打开歌单清 g_cover_path 致 META 报空）
+                                   * 时保留上一张已解码封面，勿据此清封面 → 播放页/歌词页封面不闪没 */
     if (g_np_cover) { meow_img_free(g_np_cover); g_np_cover = NULL; }
     snprintf(g_np_cover_path, sizeof g_np_cover_path, "%s", s->artwork);
     if (!s->artwork[0]) return;
@@ -326,20 +336,18 @@ static void np_lyric_refresh(const meow_media_session_t *s)
     g_np_lyric_last_valid = valid;
 }
 
-/* 歌词页封面作整页背景：等比 cover 到 max(W, H-SB_BAR_H) 方块、居中铺满内容区（裁剪溢出
+/* 批② home 指示条：底部上滑回桌面的可见反馈（镜向左缘返回提示条；唯位置=屏底左缘）。
- * 部分），衬在 lyric_view 半透明 scrim 之下形成压暗封面；无封面不画（回退渐变/主题面）。
+ * 主题用 on_surface_variant（淡灰指示，iOS home 指示同款语义）；draw 在整页/空态/歌词页
- * 批6：批5 只铺渐变、从不画封面 → 歌词页无封面；此处补上封面背景，取色只做附加。 */
+ * 均调用一次（np_draw_page 播放分支/空态分支 + np_draw_lyric_page）。 */
-static void np_draw_lyric_coverbg(int W, int H)
+static void np_draw_home_bar(void)
 {
-    if (!g_np_cover) return;
+    const meow_ui_theme_t *th = s_ui_theme();
-    int size = W > (H - SB_BAR_H) ? W : (H - SB_BAR_H);
+    meow_gfx_fill_round(NP_HOME_BAR_X, NP_HOME_BAR_Y, NP_HOME_BAR_W, NP_HOME_BAR_H,
-    int x = (W - size) / 2;
+                        NP_HOME_BAR_H / 2, th->on_surface_variant);
-    int y = SB_BAR_H + (H - SB_BAR_H - size) / 2;
-    if (y < SB_BAR_H) y = SB_BAR_H;
-    meow_ui_img_cover(x, y, size, g_np_cover);
 }
 
-/* 歌词页整页绘制：铺封面取色渐变（或 theme surface）底 → lyric_view（自绘 scrim + 歌词/空态）。 */
+/* 歌词页整页绘制：背景统一黑色半透明叠加层（用户 2026-09-04，弃封面取色/封面图半透明底，
+ * 保证高亮封面下歌词对比度）→ lyric_view（自绘 scrim + 歌词/空态）。 */
 static void np_draw_lyric_page(int redraw_sb)
 {
     const meow_ui_theme_t *th = s_ui_theme();
@@ -354,15 +362,13 @@ static void np_draw_lyric_page(int redraw_sb)
     np_cover_load(meow_media_current());
     np_cover_theme_update();
     np_apply_lyric_colors();
-    if (g_np_cover)
+    /* 用户 2026-09-04：歌词页背景统一黑色半透明叠加层（弃封面取色/封面图半透明底）——
-        np_draw_lyric_coverbg(W, H);
+     * 部分高亮度封面对歌词显示不友好，黑底保证对比度。歌词行颜色/布局/滚动不变。 */
-    else if (g_np_cc_valid)
+    meow_ui_fill_rect_alpha(0, SB_BAR_H, W, H - SB_BAR_H, 0x000000, 176);
-        np_fill_gradient(0, SB_BAR_H, W, H - SB_BAR_H, g_np_cc.bg_top, g_np_cc.bg_bottom);
-    else
-        fill_rect(0, SB_BAR_H, W, H - SB_BAR_H, th->surface);
     np_lyric_refresh(meow_media_current());
     if (g_np_lyric)
         meow_widget_draw(meow_lyric_view_widget(g_np_lyric));
+    np_draw_home_bar();                     /* 批②：歌词页也示 home 指示（底部上滑可回桌面） */
     if (redraw_sb) draw_statusbar();
 }
 
@@ -388,6 +394,7 @@ static void np_draw_page(int redraw_sb)
         ui_draw((W - ui_width(t2, 18)) / 2, 348, t2, th->on_surface_variant, 18);
         const char *t3 = meow_str_zh("np.edge_back", "左缘右滑返回");
         ui_draw((W - ui_width(t3, 16)) / 2, 396, t3, th->on_surface_variant, 16);
+        np_draw_home_bar();                 /* 批②：空态也示 home 指示（底部上滑可回桌面） */
         if (redraw_sb) draw_statusbar();
         return;
     }
@@ -424,8 +431,9 @@ static void np_draw_page(int redraw_sb)
     np_draw_progress(s, pos, th);
     /* 控制按钮（SDK meow_iconbtn，命中/状态走 SDK） */
     np_draw_ctl(s);
-    /* 播放页底部干净（M6.33：歌词占位已移除——已有独立歌词页，占位多余；
+    /* 播放页底部（M6.33：歌词占位已移除——已有独立歌词页，占位多余；批②：底部仅示
-     * 歌词页无歌词时的空态由歌词页自身承载，播放页不再显示歌词占位文案）。 */
+     * home 指示条，非歌词占位）。 */
+    np_draw_home_bar();                     /* 批②：播放页示 home 指示（底部上滑可回桌面） */
     if (redraw_sb) draw_statusbar();
 }
 
@@ -553,6 +561,11 @@ void run_now_playing(struct app *apps, int napps)
                                  * 的方向感知判定（真机定位「返回滑不出」根因曾依赖此日志；
                                  * 保留，键改为 ges=np_gesture_decide 返回值）。 */
                                 np_gest_t gnp = np_gesture_decide(g_np_page, tdx, tdy, dx, dy);
+                                /* 批②：底部上滑（home）优先——该手势竖向主导、起点在底部起滑区，
+                                 * 与左缘返回（横向+左缘起点）/顶部下滑（顶部热区）互斥，故先判 home
+                                 * 覆盖（np_gesture_decide 对纵滑返回 NONE，不冲突）。 */
+                                if (np_home_gesture(tdx, tdy, dx, dy, fb_yres))
+                                    gnp = NP_GEST_HOME;
                                 logmsg("np up: page=%d down=(%d,%d) d=(%d,%d) adx=%d ady=%d ges=%d",
                                        g_np_page, tdx, tdy, dx, dy, adx, ady, (int)gnp);
                                 switch (gnp) {
@@ -576,6 +589,12 @@ void run_now_playing(struct app *apps, int napps)
                                     logmsg("np: BACK break (exit, page=%d)", g_np_page);
                                     np_exit = 1;
                                     break;
+                                case NP_GEST_HOME:
+                                    /* 批②：底部上滑 → 回桌面（后台）。媒体会话续播/进程保活归批①
+                                     * keepalive（本页退出不改保活核心），此处仅走回桌面的既有路径。 */
+                                    logmsg("np: HOME bottom-swipe-up -> back to desktop (bg)");
+                                    np_exit = 1;
+                                    break;
                                 case NP_GEST_NEXT:
                                     /* 播放页 右→左滑 → 进歌词页。 */
                                     g_np_page = NP_PAGE_LYRIC;

patch_v2/meow_launcherd/np_gesture.h

@@ -25,6 +25,7 @@ typedef enum {
     NP_GEST_NEXT,       /* 播放页 右→左滑 → 进入歌词页 */
     NP_GEST_PREV,       /* 歌词页 左→右滑 → 回到播放页 */
     NP_GEST_EXIT,       /* 播放页 任意右滑 → 返回桌面 */
+    NP_GEST_HOME,       /* 批②：底部上滑 → 返回桌面（后台保留） */
     NP_GEST_TAP,        /* 近点按（按当前页分派：播放页=按钮/进度看点） */
 } np_gest_t;
 
@@ -47,6 +48,12 @@ typedef enum {
 #ifndef NP_EDGE_SWIPE
 #define NP_EDGE_SWIPE 65     /* 左缘右滑位移阈值（镜像 meow_touch.h MEOW_EDGE_SWIPE） */
 #endif
+#ifndef NP_HOME_EDGE_H
+#define NP_HOME_EDGE_H 28    /* 底部起滑区高（自屏底向上；镜像顶部热区 NP_TOP_HOTZONE 同为 28） */
+#endif
+#ifndef NP_HOME_SWIPE
+#define NP_HOME_SWIPE 65     /* 底部上滑位移阈值（镜像 NP_SWIPE_THRESH / meow_edge_back 同口径） */
+#endif
 
 /* 左缘返回（镜像 meow_touch.c meow_edge_back：down_x∈[0,NP_EDGE_W) 且 dx>=NP_EDGE_SWIPE
  * 且横向主导）。为宿主测试免链 meow_touch.c，此处 static inline 复刻同口径。 */
@@ -58,6 +65,20 @@ static inline int np_edge_back(int down_x, int dx, int dy)
     return 0;
 }
 
+/* 批② 底部上滑返回桌面（home，与左缘返回 np_edge_back 对称）：原点在底部起滑区
+ * （down_y∈[fb_h-NP_HOME_EDGE_H, fb_h)）且**不在左缘**（down_x>=NP_EDGE_W，与 np_edge_back 按
+ * 原点分界互斥——左缘 24px 列留给左缘返回）+ 向上位移≥NP_HOME_SWIPE 且竖向主导（adx<-dy）。
+ * fb_h=屏高（调用方喂 fb_yres，宿主单测亦可喂固定值）。其余（顶部/中部起滑、横向主导、
+ * 向下滑、未达阈值）一律 0，不与顶部下滑/横向切页/点按冲突。 */
+static inline int np_home_gesture(int down_x, int down_y, int dx, int dy, int fb_h)
+{
+    int adx = dx < 0 ? -dx : dx;
+    if (down_x >= NP_EDGE_W && down_y >= fb_h - NP_HOME_EDGE_H && down_y >= 0 &&
+        dy <= -NP_HOME_SWIPE && adx < -dy)
+        return 1;
+    return 0;
+}
+
 /* 按当前页把手势几何 → 动作。down_x/down_y=抬手原点；dx/dy=抬手位移（释放-原点，即 tlx-tdx）。
  * 优先级：顶部下滑 > 横向主导切页/返回 > 点按。横向反向或无主导 → NONE（调用方忽略，不误切）。 */
 static inline np_gest_t np_gesture_decide(int page, int down_x, int down_y, int dx, int dy)

patch_v2/meow_launcherd/test_now_playing_widgets.c

@@ -308,6 +308,50 @@ int main(void)
     CHECK(np_gesture_decide(NP_PAGE_PLAY, 200, 300, 5, 80) == NP_GEST_NONE,
           "vertical dominant -> NONE");
 
+    /* ============ G5b 批② 底部上滑（home）手势（np_gesture.h np_home_gesture，纯逻辑） ============ */
+    printf("G5b bottom-swipe-up home gesture\n");
+    const int FBRES = 720;   /* 屏高（宿主 480x720；真机 fb_yres=720） */
+    const int BZ = FBRES - NP_HOME_EDGE_H;   /* 底部起滑区上界 692 */
+    /* 底部起滑 + 向上主导 ≥阈值 → HOME */
+    CHECK(np_home_gesture(200, BZ + 10, 0, -120, FBRES) == 1,
+          "home: bottom zone + up-swipe -> HOME");
+    CHECK(np_home_gesture(100, FBRES - 1, 20, -80, FBRES) == 1,
+          "home: very bottom + slight right-drift up -> HOME");
+    /* 与左缘返回互斥：左缘起点（down_x<NP_EDGE_W）不认 home（让给左缘返回） */
+    CHECK(np_home_gesture(10, BZ + 10, 0, -120, FBRES) == 0,
+          "home: left-edge origin -> NOT home (reserved for edge-back)");
+    /* 起点不在底部起滑区（顶部/中部）不认 home */
+    CHECK(np_home_gesture(200, 10, 0, -120, FBRES) == 0,
+          "home: top origin -> NOT home");
+    CHECK(np_home_gesture(200, 300, 0, -120, FBRES) == 0,
+          "home: mid origin -> NOT home");
+    /* 横向主导（向右滑）不认 home（该判给左缘返回/切页） */
+    CHECK(np_home_gesture(200, BZ + 10, 120, 0, FBRES) == 0,
+          "home: right-dominant -> NOT home");
+    /* 向下滑 / 未达阈值 / 竖向不主导 不认 home */
+    CHECK(np_home_gesture(200, BZ + 10, 0, 120, FBRES) == 0,
+          "home: downward -> NOT home");
+    CHECK(np_home_gesture(200, BZ + 10, 0, -NP_HOME_SWIPE + 1, FBRES) == 0,
+          "home: below up-threshold -> NOT home");
+    CHECK(np_home_gesture(200, BZ + 10, -120, -80, FBRES) == 0,
+          "home: horizontal-dominant up -> NOT home");
+    /* 与 now_playing.c 集成顺序一致：np_gesture_decide 对底部纵滑返回 NONE，再由 home 覆盖为 HOME */
+    {
+        int dx = 0, dy = -120, tdx = 200, tdy = BZ + 10;
+        np_gest_t gnp = np_gesture_decide(NP_PAGE_PLAY, tdx, tdy, dx, dy);
+        if (np_home_gesture(tdx, tdy, dx, dy, FBRES)) gnp = NP_GEST_HOME;
+        CHECK(gnp == NP_GEST_HOME,
+              "integration: bottom up-swipe -> HOME (overrides decide-NONE)");
+    }
+    /* 集成：左缘起点底部上滑不被误判为 home（保留给左缘返回） */
+    {
+        int tdx = 8, tdy = BZ + 10, dx = 0, dy = -120;   /* 左缘 + 上滑（竖向主导） */
+        np_gest_t gnp = np_gesture_decide(NP_PAGE_PLAY, tdx, tdy, dx, dy);
+        if (np_home_gesture(tdx, tdy, dx, dy, FBRES)) gnp = NP_GEST_HOME;
+        CHECK(gnp != NP_GEST_HOME,
+              "integration: left-edge origin up-swipe -> NOT home");
+    }
+
     /* ============ G6 歌词页：空态 + 渲染（批2 控件 + 批3 数据语义） ============ */
     printf("G6 lyric view: empty + render\n");
     meow_ui_activity_push(NP_SENTINEL);

patch_v2/meow_launcherd/test_np_cover.c

@@ -48,6 +48,7 @@ static void np_cover_load(const meow_media_session_t *s)
 {
     if (!s) return;
     if (g_np_cover && strcmp(g_np_cover_path, s->artwork) == 0) return;  /* 已载且未变 → 跳过 */
+    if (!s->artwork[0]) return;   /* 镜像 now_playing.c 2026-09-04：空 artwork 保留上一张封面（勿清） */
     if (g_np_cover) { meow_img_free(g_np_cover); g_np_cover = NULL; }
     snprintf(g_np_cover_path, sizeof g_np_cover_path, "%s", s->artwork);
     if (!s->artwork[0]) return;
@@ -135,12 +136,12 @@ int main(void)
     np_cover_load(&s);
     CHECK(g_np_cover == keep, "same path unchanged -> cache hit (no reload)");
 
-    /* ============ C2 artwork 空 → 封面清空（回退主题占位） ============ */
+    /* ============ C2 artwork 空 → 封面保留（用户 2026-09-04：勿因空 artwork 清封面） ============ */
-    printf("C2 artwork empty -> cover cleared (theme placeholder)\n");
+    printf("C2 artwork empty -> cover kept (NOT cleared)\n");
     memset(s.artwork, 0, sizeof s.artwork);
     np_cover_load(&s);
-    CHECK(g_np_cover == NULL, "artwork empty -> cover NULL (theme placeholder)");
+    CHECK(g_np_cover == keep, "artwork empty -> cover kept (non-NULL, NOT cleared)");
-    CHECK(g_np_cover_path[0] == 0, "empty -> cached path reset to \"\"");
+    CHECK(strcmp(g_np_cover_path, pa) == 0, "empty -> cached path kept (still pa)");
 
     /* ============ C3 artwork 从空复原（同路径）→ 封面重载（M6.33 修复） ============ */
     printf("C3 artwork restored (same path) -> cover reloads (M6.33)\n");

patch_v2/meowpanel/src/mp.h

@@ -292,7 +292,10 @@ int txt_tokens(char *buf, char **toks, int maxtoks);
 void join_tokens(char **toks, int from, int to, char *out, size_t cap);
 void ams_fill(sbuf_t *s);
 void ams_fg_fill(sbuf_t *s);
+void ams_bg_fill(sbuf_t *s);
+void ams_bg_parse(char *list_text, sbuf_t *s);   /* 已 strip 的 am list 文本 → bg 列表 JSON（含 /proc 采样） */
 int api_ams(int sock);
+int api_ams_bg(int sock);
 int ams_pkg_ok(const char *pkg);
 void ams_history_parse(char *out, sbuf_t *s, const char *pkg);
 void ams_history_fill(sbuf_t *s, const char *pkg);

patch_v2/meowpanel/src/mp_ams.c

@@ -194,3 +194,123 @@ int api_ams_ctl(int sock, const char *pkg, int kill)
     if (strstr(detail, "launcher offline")) return send_err(sock, 503, "AMS_UNAVAILABLE", "amsd/launcher 不可达");
     return send_err(sock, 500, "INTERNAL", detail);
 }
+
+/* ---- 批④ 后台活动列表：/api/ams/bg（只读） ----
+ * 数据源＝amsd FG/BG 注册表（am list 的 `state=bg` 行）+ 每进程 pcpu/rss（读 /proc/<pid>，
+ * 与 launcher bg_page 的 bgm_proc_sample 同源同口径，单线程静态差分缓存取 CPU 占用）。
+ * CPU/内存诚实原则：pid 读不到 / 首采样无差分基线 → 对应字段为 null（前端显示「—」），绝不编造。 */
+#define BG_CACHE_MAX 8
+static long g_bg_pid[BG_CACHE_MAX];                     /* /proc/<pid>/stat utime+stime 差分缓存（单线程串行持有） */
+static unsigned long long g_bg_tick[BG_CACHE_MAX];
+
+/* 采样单进程 CPU/内存：*pcpu<0=未知（无基线/读不到）、*rss_kb<0=未知。 */
+static void bg_proc_sample(int pid, double *pcpu, long *rss_kb)
+{
+    *pcpu = -1.0;
+    *rss_kb = -1;
+    if (pid <= 0) return;
+    char path[64], line[1024];
+    /* 内存：VmRSS（KB） */
+    snprintf(path, sizeof path, "/proc/%d/status", pid);
+    if (read_small_file(path, line, sizeof line) >= 0) {
+        char *p = strstr(line, "VmRSS:");
+        if (p) {
+            p = strchr(p, ' ');
+            if (p) { while (*p == ' ' || *p == '\t') p++; if (*p) *rss_kb = atol(p); }
+        }
+    }
+    /* CPU：/proc/<pid>/stat 的 utime(14)+stime(15) 差分 / hz（%） */
+    snprintf(path, sizeof path, "/proc/%d/stat", pid);
+    if (read_small_file(path, line, sizeof line) >= 0) {
+        char *rp = strrchr(line, ')');
+        if (rp) {
+            char *p = rp + 2;
+            unsigned long long ut = 0, st = 0;
+            for (int f = 0; f < 14 && *p; f++) {
+                while (*p == ' ' || *p == '\t') p++;
+                if (!*p) break;
+                char *end;
+                unsigned long long v = strtoull(p, &end, 10);
+                if (end == p) { p++; continue; }
+                p = end;
+                if (f == 11) ut = v;        /* utime */
+                if (f == 12) st = v;        /* stime */
+            }
+            unsigned long long cur = ut + st;
+            static double hz = 0.0;
+            if (hz <= 0) { hz = (double)sysconf(_SC_CLK_TCK); if (hz <= 0) hz = 100.0; }
+            int slot = -1, had = 0;
+            unsigned long long prev = 0;
+            for (int i = 0; i < BG_CACHE_MAX; i++)
+                if (g_bg_pid[i] == pid) { had = 1; slot = i; prev = g_bg_tick[i]; break; }
+            if (!had) {
+                for (int i = 0; i < BG_CACHE_MAX; i++) if (g_bg_pid[i] == 0) { slot = i; break; }
+                if (slot < 0) slot = 0;
+            }
+            if (slot >= 0) { g_bg_pid[slot] = pid; g_bg_tick[slot] = cur; }
+            if (had) { *pcpu = 100.0 * (double)(cur - prev) / hz; if (*pcpu < 0) *pcpu = 0; }
+        }
+    }
+}
+
+/* 解析已 strip 的 `am list` 全文 → bg 列表 JSON（state=bg 的 APP 行）。 */
+void ams_bg_parse(char *list_text, sbuf_t *s)
+{
+    char *toks[256];
+    sbuf_t apps = {0};
+    int first = 1, count = 0;
+    char *ln = list_text;
+    while (*ln) {
+        char *nl = strchr(ln, '\n');
+        if (nl) *nl = 0;
+        if (strncmp(ln, "APP ", 4) == 0) {
+            int n = txt_tokens(ln, toks, 256);
+            if (n >= 9) {
+                /* 自右向左固定（与 ams_fill 同布局）：state=tok[n-6], pid=n-5；pkg=tok[1]，name=join(tok[2..n-6)) */
+                const char *st = toks[n - 6];
+                if (strcmp(st, "bg") == 0) {
+                    char nm[128];
+                    join_tokens(toks, 2, n - 6, nm, sizeof nm);
+                    int pid = atoi(toks[n - 5]);
+                    double pcpu; long rss;
+                    bg_proc_sample(pid, &pcpu, &rss);
+                    if (!first) sA(&apps, ",");
+                    first = 0; count++;
+                    sA(&apps, "{\"pkg\":"); sA_str(&apps, toks[1]);
+                    sA(&apps, ",\"name\":"); sA_str(&apps, nm);
+                    sA(&apps, ",\"pid\":%d", pid);
+                    sA(&apps, ",\"state\":"); sA_str(&apps, st);
+                    sA(&apps, ",\"cpu_pct\":");
+                    if (pcpu < 0) sA(&apps, "null"); else sA(&apps, "%.1f", pcpu);
+                    sA(&apps, ",\"rss_kb\":");
+                    if (rss < 0) sA(&apps, "null"); else sA(&apps, "%ld", rss);
+                    sA(&apps, "}");
+                }
+            }
+        }
+        if (nl) { *nl = '\n'; ln = nl + 1; } else break;
+    }
+    sA(s, "{\"available\":true,\"count\":%d,\"ts\":%ld,\"apps\":[%s]}",
+       count, (long)time(NULL), apps.b ? apps.b : "");
+    sbuf_free(&apps);
+}
+
+void ams_bg_fill(sbuf_t *s)
+{
+    char out[16384];
+    char cmd[300];
+    snprintf(cmd, sizeof cmd, "%s list 2>/dev/null", ams_bin());
+    int code = run_cmd(cmd, out, sizeof out);
+    if (code != 0 || !strstr(out, "APP")) { sA(s, "{\"available\":false}"); return; }
+    panel_strip_ansi(out);
+    ams_bg_parse(out, s);
+}
+
+int api_ams_bg(int sock)
+{
+    sbuf_t s = {0};
+    ams_bg_fill(&s);
+    int rc = send_json(sock, 200, s.b ? s.b : "{\"available\":false}");
+    sbuf_free(&s);
+    return rc;
+}

patch_v2/meowpanel/src/mp_server.c

@@ -289,6 +289,7 @@ int handle(int sock, req_t *r)
     if (!strcmp(r->method, "GET") && !strcmp(p, "/api/power/history")) return api_power_history(sock);
     if (!strcmp(r->method, "GET") && !strcmp(p, "/api/power/events")) return api_power_events(sock);
     if (!strcmp(r->method, "GET") && !strcmp(p, "/api/ams")) return api_ams(sock);
+    if (!strcmp(r->method, "GET") && !strcmp(p, "/api/ams/bg")) return api_ams_bg(sock);   /* 批④ 后台活动列表（只读） */
     if (!strcmp(r->method, "GET") && !strcmp(p, "/api/svcd")) return api_svcd(sock);
     if (!strcmp(r->method, "GET") && !strcmp(p, "/api/overview")) return api_overview(sock);
     if (!strcmp(r->method, "GET")) {
@@ -536,6 +537,36 @@ int panel_selftest(void)
         sbuf_free(&h2);
     }
 
+    /* 6) ams_bg_parse：喂含 bg/fg 混合 state 的 am list 文本 → 仅 bg 条目、合法 JSON，
+     *    cpu_pct/rss_kb 为 null（读不到/首采样）或数字——绝不编造不一致字段。 */
+    {
+        char list[] =
+            "# amd register+state\n"
+            "APP os.meow.a 名A bg 1 1 0 clean 0\n"
+            "APP os.meow.b 名B fg 9999992 1 0 clean 0\n"
+            "APP os.meow.c 名C bg 9999991 2 1 exit 1\n";
+        sbuf_t b = {0};
+        ams_bg_parse(list, &b);
+        if (!b.b || !utf8_valid_n(b.b, b.n)) { printf("SELFTEST FAIL: ams_bg_parse 产物非法字节/为空\n"); sbuf_free(&b); return 1; }
+        jv_t *br = jv_parse(b.b, (int)b.n);
+        if (!br) { printf("SELFTEST FAIL: ams_bg_parse 产物 JSON 无法解析\n"); sbuf_free(&b); return 1; }
+        jv_t *bapps = jv_obj_get(br, "apps");
+        if (!bapps || bapps->type != J_ARR) { printf("SELFTEST FAIL: ams_bg_parse 缺 apps 数组\n"); jv_free(br); sbuf_free(&b); return 1; }
+        int bcnt = 0;
+        for (jv_t *e = bapps->child; e; e = e->next) {
+            bcnt++;
+            jv_t *st = jv_obj_get(e, "state");
+            if (!st || st->type != J_STR || strcmp(st->str, "bg") != 0) { printf("SELFTEST FAIL: ams_bg_parse 条目 state 非 bg\n"); jv_free(br); sbuf_free(&b); return 1; }
+            jv_t *cp = jv_obj_get(e, "cpu_pct");
+            jv_t *rs = jv_obj_get(e, "rss_kb");
+            if (!cp || (cp->type != J_NULL && cp->type != J_NUM)) { printf("SELFTEST FAIL: ams_bg_parse cpu_pct 非 null/数字\n"); jv_free(br); sbuf_free(&b); return 1; }
+            if (!rs || (rs->type != J_NULL && rs->type != J_NUM)) { printf("SELFTEST FAIL: ams_bg_parse rss_kb 非 null/数字\n"); jv_free(br); sbuf_free(&b); return 1; }
+        }
+        if (bcnt != 2) { printf("SELFTEST FAIL: ams_bg_parse bg 条目应 2 个，实际 %d\n", bcnt); jv_free(br); sbuf_free(&b); return 1; }
+        jv_free(br);
+        sbuf_free(&b);
+    }
+
     printf("SELFTEST PASS: 截断 UTF-8「流媒体客户\\xE7」+ net/power/ams 新增端点池 → 合法 JSON + 无非法字节\n");
     return 0;
 }

patch_v2/meowpanel/web/index.html

@@ -69,6 +69,10 @@
         <span class="nav-ico"><svg viewBox="0 0 24 24"><path d="M4 6h16M4 12h16M4 18h16" stroke="currentColor" stroke-width="2" stroke-linecap="round"/><circle cx="9" cy="6" r="2.2" fill="var(--bg)"/><circle cx="15" cy="12" r="2.2" fill="var(--bg)"/><circle cx="7" cy="18" r="2.2" fill="var(--bg)"/></svg></span>
         <span class="nav-label">进程·服务</span>
       </button>
+      <button class="nav-item" data-route="bg"      title="后台活动（App 后台常驻：CPU/内存占用 + 一键清后台）">
+        <span class="nav-ico"><svg viewBox="0 0 24 24"><path d="M12 3 3 8l9 5 9-5-9-5z" fill="none" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="M3 12l9 5 9-5" fill="none" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/><path d="M3 16l9 5 9-5" fill="none" stroke="currentColor" stroke-width="2" stroke-linejoin="round"/></svg></span>
+        <span class="nav-label">后台</span>
+      </button>
       <button class="nav-item" data-route="system"  title="系统信息 / 升级">
         <span class="nav-ico"><svg viewBox="0 0 24 24"><rect x="6" y="3" width="12" height="18" rx="2" fill="none" stroke="currentColor" stroke-width="2"/><path d="M9 8h6M9 12h6M9 16h3" stroke="currentColor" stroke-width="2" stroke-linecap="round"/></svg></span>
         <span class="nav-label">系统</span>
@@ -92,6 +96,7 @@
       </button>
       <h1 class="topbar-title" id="page-title">首页仪表盘</h1>
       <div class="topbar-actions">
+        <button class="btn topbar-btn" id="bg-clear" hidden>一键清后台</button>
         <span class="conn" id="conn-dot" data-state="unknown" title="后端连接">
           <span class="conn-dot"></span><span class="conn-text" id="conn-text">检测中…</span>
         </span>

patch_v2/meowpanel/web/meowpanel.css

@@ -171,6 +171,8 @@ body{
 .conn[data-state="bad"] .conn-dot{ background:var(--error); }
 .conn[data-state="ok"]{ color:var(--success); }
 .conn[data-state="bad"]{ color:var(--error); }
+.topbar-actions{ display:flex; align-items:center; gap:8px; }
+.topbar-btn{ padding:6px 12px; font-size:12px; }
 
 /* 内容区 */
 .content{ flex:1; overflow-y:auto; padding:20px; }
@@ -269,6 +271,19 @@ input[type=range]{ width:100%; accent-color:var(--primary); }
 .app-card .app-meta{ font-size:12px; color:var(--on-surface-variant); }
 .app-card .app-actions{ display:flex; gap:6px; margin-top:auto; flex-wrap:wrap; }
 
+/* 后台活动列表（批④，与启动器后台管理页观感呼应：MD3 圆角卡 + 行右杀按钮） */
+.bg-list{ display:flex; flex-direction:column; gap:8px; }
+.bg-row{
+  display:flex; align-items:center; gap:12px;
+  padding:12px 14px; background:var(--surface-variant);
+  border-radius:var(--radius-l); border:var(--outline-w) solid var(--outline-variant);
+}
+.bg-row .bg-ico{ width:40px; height:40px; border-radius:var(--radius-m); background:var(--primary); color:var(--on-primary); display:flex; align-items:center; justify-content:center; font-weight:700; font-size:16px; flex:0 0 40px; }
+.bg-row .bg-info{ flex:1; min-width:0; }
+.bg-row .bg-name{ font-weight:600; }
+.bg-row .bg-sub{ font-size:12px; color:var(--on-surface-variant); margin-top:2px; display:flex; align-items:center; gap:6px; flex-wrap:wrap; }
+.bg-row .btn{ flex:0 0 auto; }
+
 /* 实时屏幕（屏幕页） */
 .screen-frame{ display:flex; justify-content:center; max-width:480px; margin:0 auto; }
 .screen-frame img{

patch_v2/meowpanel/web/meowpanel.js

@@ -3,7 +3,7 @@
 (function () {
   'use strict';
   var MP = window.MP;
-const { $, $$, LOG_GROUP_NAME, SPARK_MAX, api, apiDownload, applyTheme, authMode, authRequired, barHtml, bindLogin, bindPwDlg, bindSlider, bindThemeUi, browserMode, confirmDlg, dbPct, dbg, dbgErr, debounce, deciToDb, devStyleLabel, devThemeLabel, doLogin, drawSpark, emptyState, errText, esc, fmtBytes, fmtDb, fmtTime, fmtUptime, hideLogin, homeCard, homeKv, homeUnavailable, initTheme, isAvail, levelMeterHtml, loginErr, modePill, passwordDlg, pct, pushSpark, refreshAuthGate, resetSpark, resolveMode, resolveStyle, saveSetting, setConn, showLogin, slur, sparkPeak, sparkRms, sparklineHtml, sparklinePoints, stat, state, storageDel, storageGet, storageSet, storedMode, storedStyle, toast, toastTimer, updateLevelMeter, volTimer, absFor, appInfo, appStatePill, appUninstall, applyScreenDeltaDom, audioCard, audioCtlHtml, audioFlowHtml, audioPortName, audioRouteLabel, batteryCard, batteryCardBody, bindApps, bindAudio, bindFiles, bindFonts, bindHome, bindLogs, bindNet, bindNotif, bindPin, bindPower, bindProc, bindScreen, bindSettings, bindSystem, breakdownCardBody, btCard, createImgFromBlob, crumbHtml, deviceCard, doDownload, ensureScreenCanvas, escSafeAttr, estimateCardBody, eventsBar, fetchAudioOnce, fetchHomeLevel, fetchHomeSystem, fetchNetConns, fetchNetLog, fetchNetOnce, fetchOverviewOnce, fetchPerfOnce, fetchPowerOnce, fetchProcOnce, fetchScreen, fmtDur, fmtFrames, groupName, handleRemoteGesture, healthCard, importFont, importFontPage, installFromFile, installFromPath, joinRel, loadFonts, loadFontsPage, loadPinStatus, logsCrashCard, mkdirFile, navFiles, netBadge, netBannerErr, netCard, netConnsBody, netDnsBody, netIfaceCards, netPolicyCard, netStateCls, netStatusCards, newestStdout, perfCard, pinEdit, pinEditDlg, powerEventsCard, powerHistoryCard, powerPolicyCard, powerProfileLabel, powerSummaryCard, pubBytesCard, remoteBtn, remotePadHtml, remotePointerDown, remotePointerUp, removeFile, renameFile, renderApps, renderAudio, renderBright, renderFiles, renderFontsPage, renderHome, renderHomeCards, renderLogs, renderLogsFiles, renderNet, renderNotif, renderPerf, renderPerfData, renderPower, renderPowerBody, renderProc, renderProcBody, renderScreen, renderSettings, renderSystem, restartScreenPoll, row, screenTap, seedScreenCanvas, segments, sendKey, sendKeyLabel, sendKeyRepeat, sendTheme, setBrightCtl, setPanelPassword, settingControl, srcPill, stopAudio, stopHome, stopNet, stopPerf, stopPower, stopProc, stopScreenPoll, storageCard, svcStatePill, uploadFiles, viewAppStdout, viewLogsCrashTail, volSteps } = MP;
+const { $, $$, LOG_GROUP_NAME, SPARK_MAX, api, apiDownload, applyTheme, authMode, authRequired, barHtml, bindLogin, bindPwDlg, bindSlider, bindThemeUi, browserMode, confirmDlg, dbPct, dbg, dbgErr, debounce, deciToDb, devStyleLabel, devThemeLabel, doLogin, drawSpark, emptyState, errText, esc, fmtBytes, fmtDb, fmtTime, fmtUptime, hideLogin, homeCard, homeKv, homeUnavailable, initTheme, isAvail, levelMeterHtml, loginErr, modePill, passwordDlg, pct, pushSpark, refreshAuthGate, resetSpark, resolveMode, resolveStyle, saveSetting, setConn, showLogin, slur, sparkPeak, sparkRms, sparklineHtml, sparklinePoints, stat, state, storageDel, storageGet, storageSet, storedMode, storedStyle, toast, toastTimer, updateLevelMeter, volTimer, absFor, appInfo, appStatePill, appUninstall, applyScreenDeltaDom, audioCard, audioCtlHtml, audioFlowHtml, audioPortName, audioRouteLabel, batteryCard, batteryCardBody, bindApps, bindAudio, bindBg, bindFiles, bindFonts, bindHome, bindLogs, bindNet, bindNotif, bindPin, bindPower, bindProc, bindScreen, bindSettings, bindSystem, breakdownCardBody, btCard, createImgFromBlob, crumbHtml, deviceCard, doDownload, ensureScreenCanvas, escSafeAttr, estimateCardBody, eventsBar, fetchAudioOnce, fetchHomeLevel, fetchHomeSystem, fetchNetConns, fetchNetLog, fetchNetOnce, fetchOverviewOnce, fetchPerfOnce, fetchPowerOnce, fetchProcOnce, fetchScreen, fmtDur, fmtFrames, groupName, handleRemoteGesture, healthCard, importFont, importFontPage, installFromFile, installFromPath, joinRel, loadFonts, loadFontsPage, loadPinStatus, logsCrashCard, mkdirFile, navFiles, netBadge, netBannerErr, netCard, netConnsBody, netDnsBody, netIfaceCards, netPolicyCard, netStateCls, netStatusCards, newestStdout, perfCard, pinEdit, pinEditDlg, powerEventsCard, powerHistoryCard, powerPolicyCard, powerProfileLabel, powerSummaryCard, pubBytesCard, remoteBtn, remotePadHtml, remotePointerDown, remotePointerUp, removeFile, renameFile, renderApps, renderAudio, renderBg, renderBgBody, renderBright, renderFiles, renderFontsPage, renderHome, renderHomeCards, renderLogs, renderLogsFiles, renderNet, renderNotif, renderPerf, renderPerfData, renderPower, renderPowerBody, renderProc, renderProcBody, renderScreen, renderSettings, renderSystem, restartScreenPoll, row, screenTap, seedScreenCanvas, segments, sendKey, sendKeyLabel, sendKeyRepeat, sendTheme, setBrightCtl, setPanelPassword, settingControl, srcPill, stopAudio, stopBg, stopHome, stopNet, stopPerf, stopPower, stopProc, stopScreenPoll, storageCard, svcStatePill, uploadFiles, viewAppStdout, viewLogsCrashTail, volSteps } = MP;
 
   const ROUTES = {
     home: { title: '首页仪表盘', render: renderHome, bind: bindHome },
@@ -20,7 +20,8 @@ const { $, $$, LOG_GROUP_NAME, SPARK_MAX, api, apiDownload, applyTheme, authMode
     logs: { title: '系统日志', render: renderLogs, bind: bindLogs },
     notif: { title: '通知中心', render: renderNotif, bind: bindNotif },
     power: { title: '电源 / 功耗', render: renderPower, bind: bindPower },
-    proc: { title: '进程 / 服务', render: renderProc, bind: bindProc }
+    proc: { title: '进程 / 服务', render: renderProc, bind: bindProc },
+    bg: { title: '后台管理', render: renderBg, bind: bindBg }
   };
   let started = false;
 
@@ -33,7 +34,7 @@ const { $, $$, LOG_GROUP_NAME, SPARK_MAX, api, apiDownload, applyTheme, authMode
     bindNav();
     bindThemeUi();
     bindSlider();
-    bindFiles(); bindApps(); bindFonts(); bindSettings(); bindScreen(); bindSystem(); bindLogs(); bindNotif(); bindNet(); bindHome(); bindProc(); bindPin(); bindAudio();
+    bindFiles(); bindApps(); bindFonts(); bindSettings(); bindScreen(); bindSystem(); bindLogs(); bindNotif(); bindNet(); bindHome(); bindProc(); bindBg(); bindPin(); bindAudio();
     bindLogin();
     bindPwDlg();
     // 首次进入：访问级 PIN 鉴权——已登录直接进；未设 PIN（且无旧密码）→ 首次设置流程；已设 → 登录
@@ -58,8 +59,12 @@ const { $, $$, LOG_GROUP_NAME, SPARK_MAX, api, apiDownload, applyTheme, authMode
     stopHome();
     stopPower();
     stopProc();
+    stopBg();
     $$('.nav-item').forEach(b => b.classList.toggle('active', b.dataset.route === id));
     $('#page-title').textContent = r.title;
+    // 顶栏「一键清后台」仅后台管理页显示（内容由 fetchBgOnce 按数据更新）
+    const bc = $('#bg-clear');
+    if (bc) { bc.hidden = (id !== 'bg'); if (id !== 'bg') bc.disabled = false; }
     r.render();
   }
 

patch_v2/meowpanel/web/mp_pages.js

@@ -885,6 +885,105 @@ const { $, $$, LOG_GROUP_NAME, SPARK_MAX, api, apiDownload, applyTheme, authMode
     });
   }
 
+  /* ---- 批④ 后台活动页（#/bg）：列表 + 行内「杀死」 + 顶栏「一键清后台」（复用 /api/ams/bg 只读 + /api/ams/:pkg/kill） ---- */
+  let bgTimer = null;
+  let bgData = null;   // {available,count,apps:[{pkg,name,pid,state,cpu_pct,rss_kb}]}
+
+  function stopBg() { if (bgTimer) { clearInterval(bgTimer); bgTimer = null; } }
+
+  function bgIconHtml(a) {
+    const ch = esc((a.name || a.pkg || '?').charAt(0).toUpperCase());
+    return '<span class="bg-ico">' + ch + '</span>';
+  }
+
+  function renderBgBody(d) {
+    let h = '<div class="page" id="bg-page">';
+    h += '<div class="card"><h3 class="card-title">后台活动 App（meow_amsd bg · 只读）</h3>';
+    if (!d || d.available === false) {
+      h += homeUnavailable();
+    } else {
+      const apps = d.apps || [];
+      if (!apps.length) {
+        h += '<div class="empty">无后台 App</div>';
+      } else {
+        h += '<div class="bg-list">';
+        apps.forEach(a => {
+          const cpu = (a.cpu_pct == null) ? '—' : a.cpu_pct.toFixed(1) + '%';
+          const mem = (a.rss_kb == null) ? '—' : fmtBytes(Number(a.rss_kb) * 1024);
+          const sub = 'CPU ' + cpu + ' · ' + mem + ' · 后台' +
+            (a.pid > 0 ? ' · pid ' + esc(a.pid) : '');
+          h += '<div class="bg-row">' + bgIconHtml(a) +
+            '<div class="bg-info"><div class="bg-name">' + esc(a.name || a.pkg || '未命名') + '</div>' +
+            '<div class="bg-sub">' + sub + '<span class="mono">' + esc(a.pkg) + '</span></div></div>' +
+            '<button class="btn btn-danger" data-bgkill="' + esc(a.pkg) + '">杀死</button></div>';
+        });
+        h += '</div>';
+      }
+      h += '<p class="muted">占用数据读自 /proc/&lt;pid&gt;（与启动器后台管理页同源、同口径）；「杀死」经 amsd（require_auth）。CPU 首采样为「—」，轮询后显示真实占用；数据不可得时如实显示「—」，绝不编造。</p>';
+    }
+    h += '</div></div>';
+    return h;
+  }
+
+  async function fetchBgOnce() {
+    const el = $('#bg-page');
+    if (!el || state.route !== 'bg') return;
+    let d = null;
+    try { d = await api('GET', '/api/ams/bg'); }
+    catch (e) {
+      if (state.route === 'bg') el.innerHTML = '<div class="page" id="bg-page">' + emptyState('加载失败：' + errText(e), e.code) + '</div>';
+      const bc = $('#bg-clear'); if (bc) bc.disabled = true;
+      return;
+    }
+    if (state.route !== 'bg') return;
+    bgData = d;
+    el.innerHTML = renderBgBody(d);
+    const bc = $('#bg-clear');
+    if (bc) {
+      const n = (d && d.apps && d.apps.length) ? d.apps.length : 0;
+      bc.disabled = !n;
+      bc.textContent = '一键清后台' + (n ? ' (' + n + ')' : '');
+    }
+  }
+
+  function renderBg() {
+    stopBg();
+    $('#content').innerHTML = '<div class="page" id="bg-page"><p class="placeholder">加载后台 App…</p></div>';
+    fetchBgOnce();
+    bgTimer = setInterval(fetchBgOnce, 4000);
+  }
+
+  async function bgKill(pkg) {
+    const ok = await confirmDlg('结束 App', '确认结束后台 App ' + pkg + '？（SIGTERM 语义）', true);
+    if (!ok) return;
+    try { await api('POST', '/api/ams/' + encodeURIComponent(pkg) + '/kill'); toast('已请求结束 ' + pkg); }
+    catch (e) { toast('结束失败：' + errText(e)); }
+    fetchBgOnce();
+  }
+
+  async function bgClearAll() {
+    const list = (bgData && bgData.apps) ? bgData.apps : [];
+    if (!list.length) { toast('无后台 App 可清'); return; }
+    const ok = await confirmDlg('一键清除后台', '将结束 ' + list.length + ' 个后台 App，确认？（SIGTERM 语义）', true);
+    if (!ok) return;
+    let done = 0, fail = 0;
+    for (const a of list) {
+      try { await api('POST', '/api/ams/' + encodeURIComponent(a.pkg) + '/kill'); done++; }
+      catch (e) { fail++; }
+    }
+    toast('已清 ' + done + ' 个后台 App' + (fail ? '，' + fail + ' 个失败' : ''));
+    fetchBgOnce();
+  }
+
+  function bindBg() {
+    $('#content').addEventListener('click', async function (e) {
+      const kl = e.target.closest('[data-bgkill]');
+      if (kl) { await bgKill(kl.dataset.bgkill); return; }
+    });
+    const bc = $('#bg-clear');
+    if (bc) bc.addEventListener('click', bgClearAll);
+  }
+
   function stopNet() { if (netTimer) { clearInterval(netTimer); netTimer = null; } }
 
   function fmtDur(sec) {   // 连接寿命（秒级精度）
@@ -2376,5 +2475,5 @@ const { $, $$, LOG_GROUP_NAME, SPARK_MAX, api, apiDownload, applyTheme, authMode
     });
   }
 
-  Object.assign(MP, { absFor, appInfo, appStatePill, appUninstall, applyScreenDeltaDom, audioCard, audioCtlHtml, audioFlowHtml, audioPortName, audioRouteLabel, batteryCard, batteryCardBody, bindApps, bindAudio, bindFiles, bindFonts, bindHome, bindLogs, bindNet, bindNotif, bindPin, bindPower, bindProc, bindScreen, bindSettings, bindSystem, breakdownCardBody, btCard, createImgFromBlob, crumbHtml, deviceCard, doDownload, ensureScreenCanvas, escSafeAttr, estimateCardBody, eventsBar, fetchAudioOnce, fetchHomeLevel, fetchHomeSystem, fetchNetConns, fetchNetLog, fetchNetOnce, fetchOverviewOnce, fetchPerfOnce, fetchPowerOnce, fetchProcOnce, fetchScreen, fmtDur, fmtFrames, groupName, handleRemoteGesture, healthCard, importFont, importFontPage, installFromFile, installFromPath, joinRel, loadFonts, loadFontsPage, loadPinStatus, logsCrashCard, mkdirFile, navFiles, netBadge, netBannerErr, netCard, netConnsBody, netDnsBody, netIfaceCards, netPolicyCard, netStateCls, netStatusCards, newestStdout, perfCard, pinEdit, pinEditDlg, powerEventsCard, powerHistoryCard, powerPolicyCard, powerProfileLabel, powerSummaryCard, pubBytesCard, remoteBtn, remotePadHtml, remotePointerDown, remotePointerUp, removeFile, renameFile, renderApps, renderAudio, renderBright, renderFiles, renderFontsPage, renderHome, renderHomeCards, renderLogs, renderLogsFiles, renderNet, renderNotif, renderPerf, renderPerfData, renderPower, renderPowerBody, renderProc, renderProcBody, renderScreen, renderSettings, renderSystem, restartScreenPoll, row, screenTap, seedScreenCanvas, segments, sendKey, sendKeyLabel, sendKeyRepeat, sendTheme, setBrightCtl, setPanelPassword, settingControl, srcPill, stopAudio, stopHome, stopNet, stopPerf, stopPower, stopProc, stopScreenPoll, storageCard, svcStatePill, uploadFiles, viewAppStdout, viewLogsCrashTail, volSteps });
+  Object.assign(MP, { absFor, appInfo, appStatePill, appUninstall, applyScreenDeltaDom, audioCard, audioCtlHtml, audioFlowHtml, audioPortName, audioRouteLabel, batteryCard, batteryCardBody, bgClearAll, bgIconHtml, bindBg, bindApps, bindAudio, bindFiles, bindFonts, bindHome, bindLogs, bindNet, bindNotif, bindPin, bindPower, bindProc, bindScreen, bindSettings, bindSystem, breakdownCardBody, btCard, createImgFromBlob, crumbHtml, deviceCard, doDownload, ensureScreenCanvas, escSafeAttr, estimateCardBody, eventsBar, fetchAudioOnce, fetchBgOnce, fetchHomeLevel, fetchHomeSystem, fetchNetConns, fetchNetLog, fetchNetOnce, fetchOverviewOnce, fetchPerfOnce, fetchPowerOnce, fetchProcOnce, fetchScreen, fmtDur, fmtFrames, groupName, handleRemoteGesture, healthCard, importFont, importFontPage, installFromFile, installFromPath, joinRel, loadFonts, loadFontsPage, loadPinStatus, logsCrashCard, mkdirFile, navFiles, netBadge, netBannerErr, netCard, netConnsBody, netDnsBody, netIfaceCards, netPolicyCard, netStateCls, netStatusCards, newestStdout, perfCard, pinEdit, pinEditDlg, powerEventsCard, powerHistoryCard, powerPolicyCard, powerProfileLabel, powerSummaryCard, pubBytesCard, remoteBtn, remotePadHtml, remotePointerDown, remotePointerUp, removeFile, renameFile, renderApps, renderAudio, renderBg, renderBgBody, renderBright, renderFiles, renderFontsPage, renderHome, renderHomeCards, renderLogs, renderLogsFiles, renderNet, renderNotif, renderPerf, renderPerfData, renderPower, renderPowerBody, renderProc, renderProcBody, renderScreen, renderSettings, renderSystem, restartScreenPoll, row, screenTap, seedScreenCanvas, segments, sendKey, sendKeyLabel, sendKeyRepeat, sendTheme, setBrightCtl, setPanelPassword, settingControl, srcPill, stopAudio, stopBg, stopHome, stopNet, stopPerf, stopPower, stopProc, stopScreenPoll, storageCard, svcStatePill, uploadFiles, viewAppStdout, viewLogsCrashTail, volSteps });
 })();

patch_v2/ncm_app/app/ui/home.c

@@ -1,8 +1,9 @@
 /* ui/home.c — 我的音乐页（ACT_HOME，根页，已登录）。
  *
- * 网易云风格（NCM_UI_DESIGN §4.2）：红系 topbar（标题「我的音乐」+搜索/刷新/设置动作）+
+ * 网易云风格（NCM_UI_DESIGN §4.2）：红系 topbar（标题「我的音乐」+搜索/刷新/设置/回播放页动作）+
  * 个人区卡片（头像/昵称/ID）+ 双页签「我创建的/我收藏的」（meow_tabbar + 各自 meow_listview）+
  * 组头红条 + 歌单行（rounded card + 红 mini-vinyl 缩略 + 红色按压竖条）。
+ * 批6：顶栏「回播放页」按钮（sb_icons 位图，动作3 最右）——无活动音频也生效，按下 push(ACT_PLAYER)。
  *
  * 品牌红走 ncm_palette(g_dark)（App 无权改 SDK MD3 蓝 primary），代码零硬编码散落：
  * 中性色读 meow_theme_get()，红读 ncm_palette()。SDK listview 的 MD3 蓝选中不可改，
@@ -297,7 +298,8 @@ int home_on_tap(int x, int y)
             return 1;
         }
         if (ah == 1) { home_drag_reset(); settings_open(); return 1; }      /* 设置 */
-        if (ah >= 2) { home_drag_reset(); search_open(); return 1; }        /* 搜索（最右） */
+        if (ah == 2) { home_drag_reset(); search_open(); return 1; }        /* 搜索 */
+        if (ah == 3) { home_drag_reset(); meow_view_page_push(ACT_PLAYER); return 1; }  /* 回播放页 */
     }
     if (g_tabs && meow_widget_hit(g_tabs, x, y)) {
         int t = meow_tabbar_hit(g_tabs, x, y);
@@ -373,12 +375,16 @@ static void home_page_create(meow_view *v, void *ctx)
     meow_ui_activity_push(ACT_HOME);   /* owner=ACT_HOME */
     g_tb = ncm_topbar_create("我的音乐", 0, "\xe2\x86\xbb");   /* 刷新(动作0) */
     meow_topappbar_add_action(g_tb, "\xe2\x9a\x99");           /* 设置(动作1) */
-    meow_topappbar_add_action(g_tb, "\xe2\x8c\x95");           /* 搜索(动作2, 最右) */
+    meow_topappbar_add_action(g_tb, "\xe2\x8c\x95");           /* 搜索(动作2) */
+    /* 批6：回播放页（动作3, 最右）。无活动音频也生效——按下即 push(ACT_PLAYER)，播放页按 appstate
+     * 现有语义展示空态（暂无播放）/上次会话状态。 */
+    meow_topappbar_add_action(g_tb, "\xe2\x99\xaa");           /* 回播放页(动作3, 最右) */
     /* §307 topbar 图标迁移：三位码点（↻ ⚙ ⌕）在 4k 字库缺字形渲染成豆腐（WORK_STATE 310 前置
      * 症状①），改为 sb_icons 位图（Material Symbols Rounded，字符标签仅作占位，绘制走位图）。 */
     meow_topappbar_set_item_icon(g_tb, 0, MEOW_ICON_REFRESH);
     meow_topappbar_set_item_icon(g_tb, 1, MEOW_ICON_SETTINGS);
     meow_topappbar_set_item_icon(g_tb, 2, MEOW_ICON_SEARCH);
+    meow_topappbar_set_item_icon(g_tb, 3, MEOW_ICON_QUEUE_MUSIC);   /* 回播放页 */
     g_tabs = meow_tabbar_create(r_tabs.x, r_tabs.y, r_tabs.w, r_tabs.h);
     meow_tabbar_add_tab(g_tabs, tab_label(0));
     meow_tabbar_add_tab(g_tabs, tab_label(1));

patch_v2/sdk/include/meow_ui_widgets.h

@@ -147,13 +147,14 @@ meow_widget *meow_btn_create_variant(int x, int y, int w, int h, const char *lab
 int          meow_btn_set_variant(meow_widget *w, int variant);   /* 越界 clamp；0=成功 */
 
 /* ---- MD3 shape 层级（§5.8.6，Material You 圆角体系，单位 px）----
- * 组件按角色落到四档 + 胶囊：按钮=full（全高一半）、卡=large(16)、输入框=small(8)、
+ * 组件按角色落到五档 + 胶囊：按钮=full（全高一半）、对话框=extra-large(28)、卡=large(16)、
- * 勾选=extrasmall(4)。theme.radius/radius_card 为风格族默认；App 可经 opts.radius 逐控件覆盖。
+ * 输入框=small(8)、勾选=extrasmall(4)。theme.radius/radius_card 为风格族默认；App 可经
- * 全高一半用 MEOW_SHAPE_FULL(h) 宏（控件的胶囊圆角）。 */
+ * opts.radius 逐控件覆盖。全高一半用 MEOW_SHAPE_FULL(h) 宏（控件的胶囊圆角）。 */
-#define MEOW_SHAPE_EXTRASMALL 4      /* 勾选 Checkbox/Radio */
+#define MEOW_SHAPE_EXTRASMALL 4       /* 勾选 Checkbox/Radio */
-#define MEOW_SHAPE_SMALL      8      /* 输入框 TextField */
+#define MEOW_SHAPE_SMALL      8       /* 输入框 TextField */
-#define MEOW_SHAPE_MEDIUM     12     /* 主题默认 radius（列表卡/通用控件） */
+#define MEOW_SHAPE_MEDIUM     12      /* 主题默认 radius（列表卡/通用控件） */
-#define MEOW_SHAPE_LARGE      16     /* 卡片/容器（theme.radius_card 默认） */
+#define MEOW_SHAPE_LARGE      16      /* 卡片/容器（theme.radius_card 默认） */
+#define MEOW_SHAPE_EXTRA_LARGE 28     /* 对话框 Dialog（MD3 标准 extra-large） */
 #define MEOW_SHAPE_FULL(h)    ((h) / 2)   /* 全形=胶囊（按钮/导航等） */
 
 /* ---- TextField（单行文本输入，接 IME §5.1）---- */

patch_v2/sdk/meow_ui_dialog.c

@@ -100,8 +100,8 @@ static void dlg_calc(meow_dialog *d, const meow_theme *th, dlg_geom *g)
 static void dlg_card(meow_dialog *d, const meow_theme *th, const dlg_geom *g)
 {
     int pad = 24;
-    meow_gfx_fill_round(g->dx, g->dy, g->dw, g->dh, th->radius_card, th->surfaceContainerHighest);
+    meow_gfx_fill_round(g->dx, g->dy, g->dw, g->dh, MEOW_SHAPE_EXTRA_LARGE, th->surfaceContainerHighest);
-    meow_ui_draw_rect_round(g->dx, g->dy, g->dw, g->dh, th->radius_card, th->outline);
+    meow_ui_draw_rect_round(g->dx, g->dy, g->dw, g->dh, MEOW_SHAPE_EXTRA_LARGE, th->outline);
     meow_ui_text(g->dx + pad, g->dy + pad, d->title, th->font_title, th->onSurface);
 
     if (d->type == MEOW_DLG_SELECT) {
@@ -358,7 +358,7 @@ int meow_sheet_open(meow_sheet *s)
     meow_ui_modal_capture();             /* M2.71-bug3：拍下背景，关闭即还原（scrim 只叠一层/无残影） */
     /* 首次绘制：遮罩 + 底部面板（顶部圆角） */
     meow_ui_fill_rect_alpha(0, 0, W, H, 0x000000, 150);
-    meow_gfx_fill_round(0, py, W, ph, th->radius_card, th->surfaceContainerHighest);
+    meow_gfx_fill_round(0, py, W, ph, MEOW_SHAPE_EXTRA_LARGE, th->surfaceContainerHighest);
     meow_ui_text(pad, py + pad, s->title, th->font_title, th->onSurface);
     for (int i = 0; i < s->nitems; i++) {
         int ry = py + pad + meow_ui_text_height(th->font_title) + 12 + i * MEOW_MODAL_ROW;