fix: loadTrades before chart init + try-catch for CDN failure

- Reorder init(): loadTrades() runs first, charts second
- Wrap chart init in try-catch so UI survives CDN issues
- Update start.sh to detect changes in embedded .html/.js/.css

start.sh

@@ -29,8 +29,9 @@ if ss -tlnp 2>/dev/null | grep -q ":$PORT "; then
     exit 1
 fi
 
-# 编译（如果源码有变更）
-if [ ! -x "$BIN" ] || [ "$(find . -name '*.go' -newer "$BIN" 2>/dev/null | head -1)" ]; then
+# 编译（如果源码或嵌入文件有变更）
+WEB_FILES=$(find web/static -name '*.html' -o -name '*.js' -o -name '*.css' 2>/dev/null)
+if [ ! -x "$BIN" ] || [ -n "$(find . -name '*.go' $WEB_FILES -newer "$BIN" 2>/dev/null | head -1)" ]; then
     echo "[start] 编译新二进制..."
     go build -o "$BIN" . 2>&1
 fi