fix(sdk+launcher): 图标不渲染真根因(agent-219) — meow_ui_img.c scale_buf cover 采样把乘写成除(÷缩放比→采到源图左上角透明区,全丢); 改乘+居中裁剪偏移修正; 宿主旧测试用纯色图掩盖了该bug。+ main_menu App退出/结构变化重绘时 fb_pan_buf0_force 无条件pan回buffer0(防App翻页留buffer1致菜单残帧)

meow_ui.a→3e0ee8f7 launcher→9d0efc2f hello→9609ea6e files→90f5cf07 ncm→be8be221(均已上卡); 真机截图证据 .tmp/meowbug/fix1.png+fix_b2_after.png

patch_v2/files_app/app.c

@@ -10,14 +10,74 @@
  * 文本预览换页（push ACT_VIEWER）。退出=在根目录左滑或 SIGTERM（看门狗）。
  */
 #include "files_internal.h"
+#include "meow_notify_ipc.h"   /* §6.2 二期：picker 结果经 MSG_PICKER_RESULT 回传 */
+#include "meow_ipc.h"
 
 #include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 
 static meow_view *g_browser_view;
 static meow_view *g_viewer_view;
 
 static void on_sigterm(int s) { (void)s; meow_ui_request_exit(); }
 
+/* ============================================================ */
+/* §6.2 二期：picker 模式（launcher 注入 MEOW_PICKER_* → 选文件返回路径） */
+/* ============================================================ */
+static char     g_picker_action[24];
+static char     g_picker_caller[MEOW_APP_ID_MAX];
+static uint32_t g_picker_req_id;
+static int      g_picker_active;
+
+int picker_active(void)          { return g_picker_active; }
+const char *picker_action(void)  { return g_picker_action; }
+uint32_t   picker_req_id(void)   { return g_picker_req_id; }
+
+static void picker_init(void)
+{
+    const char *a = getenv("MEOW_PICKER_ACTION");
+    if (!a || !a[0]) return;
+    snprintf(g_picker_action, sizeof g_picker_action, "%s", a);
+    g_picker_active = 1;
+    const char *c = getenv("MEOW_PICKER_CALLER");
+    if (c) snprintf(g_picker_caller, sizeof g_picker_caller, "%s", c);
+    const char *r = getenv("MEOW_PICKER_REQ_ID");
+    g_picker_req_id = r ? (uint32_t)atoi(r) : 0;
+    meow_log(MEOW_LOG_INFO, "picker: mode action=%s req=%u caller=%s",
+             g_picker_action, g_picker_req_id, g_picker_caller);
+}
+
+/* 选文件：发 MSG_PICKER_RESULT（OK+路径）+ 请求退出。best-effort（launcher 不在静默）。 */
+void picker_return_file(const char *path)
+{
+    m_picker_result_t r;
+    memset(&r, 0, sizeof r);
+    snprintf(r.caller, sizeof r.caller, "%s", g_picker_caller);
+    r.req_id = g_picker_req_id;
+    snprintf(r.action, sizeof r.action, "%s", g_picker_action);
+    r.code = MEOW_OK;
+    if (path) snprintf(r.value, sizeof r.value, "%s", path);
+    (void)meow_notify_ipc_send_raw(MSG_PICKER_RESULT, &r, (uint32_t)sizeof r, 1);
+    meow_log(MEOW_LOG_INFO, "picker: return path=%s", path ? path : "");
+    meow_ui_request_exit();
+}
+
+/* 取消：发 MSG_PICKER_RESULT（MEOW_ERR_NOENT+空值）+ 请求退出。 */
+void picker_cancel(void)
+{
+    m_picker_result_t r;
+    memset(&r, 0, sizeof r);
+    snprintf(r.caller, sizeof r.caller, "%s", g_picker_caller);
+    r.req_id = g_picker_req_id;
+    snprintf(r.action, sizeof r.action, "%s", g_picker_action);
+    r.code = MEOW_ERR_NOENT;             /* 用户取消 */
+    (void)meow_notify_ipc_send_raw(MSG_PICKER_RESULT, &r, (uint32_t)sizeof r, 1);
+    meow_log(MEOW_LOG_INFO, "picker: cancel");
+    meow_ui_request_exit();
+}
+
 /* ============================================================ */
 /* 事件分发：meow_ui_run 平铺回调 → 当前页                          */
 /* ============================================================ */
@@ -38,9 +98,10 @@ static void app_on_swipe(int dir, int dx, int dy)
 {
     (void)dx;
     if (dir == MEOW_SWIPE_LEFT) {
-        /* 左缘返回：预览页→回目录；浏览器→上级目录；到根→退出 App。 */
+        /* 左缘返回：预览页→回目录；浏览器→上级目录；到根→退出 App（picker 模式则取消）。 */
         if (viewer_is_active())  { meow_view_page_pop(); return; }
         if (browser_is_active() && browser_go_up()) return;
+        if (picker_active()) { picker_cancel(); return; }   /* §6.2 二期：根屏左滑=取消 picker */
         meow_log(MEOW_LOG_INFO, "exit:swipe");
         meow_ui_request_exit();
         return;
@@ -88,6 +149,7 @@ int main(void)
     meow_theme_add_listener(NULL);
 
     signal(SIGTERM, on_sigterm);
+    picker_init();   /* §6.2 二期：读 MEOW_PICKER_* 决定是否进入 picker 模式 */
 
     /* 建两页 view（on_create 建各自控件/状态 + 读卡扫首个目录） */
     g_browser_view = browser_view_create();