Clarify template workflow and unify square image preview edges

README.md

@@ -127,9 +127,25 @@ in the official API. Avoid having native and Frame Flow playback compete.
 
 ## Templates / 图片
 
-Six JSON layout templates: daily-dashboard, weather, calendar, quote, photo-text,
-system-alert. color and grayscale profiles. Photo data accepts photo_id = local asset
-ID. Mock weather is clearly labeled; no unreliable lunar date is fabricated.
+Seven JSON layout templates: daily-dashboard, weather, calendar, quote, photo-text,
+daily-poetry and system-alert, with color and grayscale profiles. Every template
+renders an image, including templates that contain only text.
+
+使用流程：选择模板 → 编辑数据 → 生成预览 → 显示到画框。生成预览只创建本地图片；
+保存默认数据只保存配置，两者都不会更新设备。自动化模板任务每次运行重新生成图片。
+
+- **照片与文字 / Photo + Text**：所选照片铺满画面，底部叠加文字。
+- **家庭早报 / Daily Dashboard**：日期、天气、事项、一句话与所选照片区域。
+- **天气 / Weather**：当前天气与三天预报；天气 JSON 留空时使用配置的 Provider。
+- **日历、每日诗词、一句话、系统告警**：将相应信息排版为图片，不自动选择图库照片。
+
+Photos use a local asset ID (`photo_id`); without a selected photo, a placeholder
+is rendered. Configure Open-Meteo and location coordinates in **Settings → Weather
+source** for real weather. Forecasts are fetched on demand and cached for ten minutes;
+unavailable/stale data is labeled explicitly. Weather remains static on the frame
+until the next render and display, so use an Automation job for regular updates.
+Official KoKonna widgets are a separate integration, not these local templates.
+No unreliable lunar date is fabricated.
 Contain preserves composition with margins; cover crops centrally; smart is an
 edge-saliency heuristic. Always inspect preview; face-aware guarantees are not claimed.
 Cloud uploads activate immediately, so gallery-only means **local staging**.