feat(canvas): 画布能力 - 完善 LibTV 导入与资源预览

web/src/lib/canvas/libtv-import.ts

@@ -0,0 +1,36 @@
+const LIBTV_PROJECT_UUID_PATTERN = /^[a-f0-9]{32}$/i;
+const LIBTV_RESOURCE_HOST = "libtv-res.liblib.art";
+const LIBTV_PREVIEW_WIDTH = 960;
+
+export function parseLibTVProjectUUID(value: string) {
+    const trimmed = value.trim();
+    if (!trimmed) return "";
+    let candidate = trimmed;
+    try {
+        const parsed = new URL(trimmed);
+        candidate = parsed.searchParams.get("projectId") || parsed.searchParams.get("uuid") || parsed.pathname.split("/").filter(Boolean).at(-1) || "";
+    } catch {
+        candidate = trimmed;
+    }
+    return LIBTV_PROJECT_UUID_PATTERN.test(candidate) ? candidate.toLowerCase() : "";
+}
+
+export function formatLibTVBatchTime(value: string) {
+    const date = new Date(value);
+    if (Number.isNaN(date.getTime())) return "未知";
+    const pad = (part: number) => String(part).padStart(2, "0");
+    return `${date.getFullYear()}${pad(date.getMonth() + 1)}${pad(date.getDate())}${pad(date.getHours())}${pad(date.getMinutes())}`;
+}
+
+export function buildLibTVImagePreviewUrl(rawUrl: string) {
+    try {
+        const url = new URL(rawUrl);
+        if (url.protocol !== "https:" || url.hostname !== LIBTV_RESOURCE_HOST) return rawUrl;
+        if (!url.searchParams.has("x-oss-process")) {
+            url.searchParams.set("x-oss-process", `image/resize,w_${LIBTV_PREVIEW_WIDTH}`);
+        }
+        return url.toString();
+    } catch {
+        return rawUrl;
+    }
+}