feat: M6.40批 — 阅读器UI改版(书架list·grid+空态骨架+界面设置+App设置页+header·footer+背景黑默认) + 系统级音量翻页映射 + P1 MD3(select面板28/对话框按钮胶囊) + MeowPanel写端点护栏 + SDK公开仓·文档同步

- reader: app.c/shelf.c/reader.c 全套UI; 新增 reader_conf(reader.conf)/settings(App设置页)/reader_ipc(音量翻页IPC响应); app.json加volume_page
- launcher: keys.c meow_volpage_*门 + util.c app_id→fd映射(HELLO记fd/断开清) + app_launcher.c 前台三处接线(进入sink/按键路径volpage_key/离开clear) → 前台声明volume_page的App音量键→MSG_KEY_PAGEUP/PAGEDOWN翻页(非阅读器前台音量照旧)
- sdk: meow_select.c 底部面板28 + meow_ui_dialog.c 对话框按钮胶囊(h/2) + test_meow_ui_select.c修采样
- meowpanel: /api/net/policy·/api/power/policy 加防自锁+policy默认关两条护栏(panel.policy_enabled默认0)
- 文档: MEOW_APP_SDK.md §12.6 + meowpanel README端点表

0warning;宿主测试全过;二进制留批量批次未入库

patch_v2/sdk/meow_select.c

@@ -103,7 +103,10 @@ int meow_select_open(meow_select *s)
     meow_ui_modal_capture();
     /* 首次绘制：遮罩 + 底部面板（顶部圆角）+ 标题 + 选项列表。 */
     meow_ui_fill_rect_alpha(0, 0, W, H, 0x000000, 150);
-    meow_gfx_fill_round(0, py, W, ph, th->radius_card, th->surfaceContainerHighest);
+    /* MD3 sheet 顶角 = corner-extra-large-top(28)（material-web _md-comp-sheet-bottom.scss），
+     * 与 Dialog 一致；同 SDK meow_sheet(meow_ui_dialog.c:361)/dialog 卡(meow_ui_dialog.c:103) 取 28，
+     * 底部面板统一 extra-large，避免同 SDK 两个 bottom sheet 顶部圆角不一致（旧 th->radius_card=16）。 */
+    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);
     meow_widget_draw(lv);
     meow_ui_flush();

patch_v2/sdk/meow_ui_dialog.c

@@ -134,12 +134,13 @@ static void dlg_card(meow_dialog *d, const meow_theme *th, const dlg_geom *g)
                 y += meow_ui_text_height(th->font_body) + 8;
             }
         }
-        /* 取消（左，text 型）/ 确定（右，filled） */
+        /* 取消（左，outlined）/ 确定（右，filled）——MD3 按钮统一为胶囊（full，全高一半），
+         * 与 SDK widget_btn_radius(meow_ui_widget.c:146) 同款；旧硬编码 radius 10 非 token。 */
         int bx = g->dx + pad, cx = bx + g->btn_w + 12, by = g->btn_y;
-        meow_ui_draw_rect_round(bx, by, g->btn_w, g->btn_h, 10, th->primary);
+        meow_ui_draw_rect_round(bx, by, g->btn_w, g->btn_h, MEOW_SHAPE_FULL(g->btn_h), th->primary);
         meow_ui_text_center(bx + g->btn_w / 2, by + (g->btn_h - meow_ui_text_height(th->font_body)) / 2,
                             meow_str("common.cancel"), th->font_body, th->primary);
-        meow_gfx_fill_round(cx, by, g->btn_w, g->btn_h, 10, th->primary);
+        meow_gfx_fill_round(cx, by, g->btn_w, g->btn_h, MEOW_SHAPE_FULL(g->btn_h), th->primary);
         meow_ui_text_center(cx + g->btn_w / 2, by + (g->btn_h - meow_ui_text_height(th->font_body)) / 2,
                             meow_str("common.ok"), th->font_body, th->onPrimary);
     }

patch_v2/sdk/test_meow_ui_select.c

@@ -111,10 +111,12 @@ static void test_select_highlight(void)
     pthread_t th; pthread_create(&th, NULL, sel_driver, &a);
     /* 等 open 的 drain + 首帧绘制完成（高亮已画进 back_buf） */
     usleep(150000);
-    /* 单选高亮：cur=2（第 3 行）选中背景 = primaryContainer */
+    /* 单选高亮：cur=2（第 3 行）选中背景 = primaryContainer。
+     * meow_listview 默认容器模式（行=surfaceContainer 12dp 圆角卡 + MEOW_LISTV_CARD_MARGIN=8 横向内缩），
+     * 选中卡左缘=8、文本左缘=24；采样点取 x=10（卡内、文本左侧），避免取到左侧空白边距（旧 x=6 落在卡外）。 */
     const meow_theme *thm = meow_theme_get();
     int pc_r, pc_g, pc_b; UNPK(thm->primaryContainer, pc_r, pc_g, pc_b);
-    int hx = 6, hy = list_y + 2 * SEL_ROW + SEL_ROW / 2;
+    int hx = 10, hy = list_y + 2 * SEL_ROW + SEL_ROW / 2;
     int r, g, b; rd_px(hx, hy, &r, &g, &b);
     CHECK(near2(r, pc_r) && near2(g, pc_g) && near2(b, pc_b),
           "T1 highlight row2 primaryContainer got %02X%02X%02X", r, g, b);