feat(canvas): TapNow - 支持公开画布导入 (#255)

(cherry picked from commit 9b96135a5e409b4718e6204ab4212b7ef22635aa)

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

@@ -0,0 +1,25 @@
+const TAPNOW_SHARE_ID_PATTERN = /^[A-Za-z0-9_-]{1,64}$/;
+const TAPNOW_SHARE_HOST = "app.tapnow.media";
+
+export function parseTapNowShareID(value: string) {
+    const trimmed = value.trim();
+    if (!trimmed) return "";
+    let candidate = trimmed;
+    try {
+        const parsed = new URL(trimmed);
+        const hostname = parsed.hostname.toLowerCase().replace(/\.$/, "");
+        if (hostname !== TAPNOW_SHARE_HOST || !/^\/tapflow\/view\/?[^/]*\/?$/.test(parsed.pathname)) return "";
+        const parts = parsed.pathname.split("/").filter(Boolean);
+        candidate = parts.at(-1) || "";
+    } catch {
+        candidate = trimmed;
+    }
+    return TAPNOW_SHARE_ID_PATTERN.test(candidate) ? candidate : "";
+}
+
+export function formatTapNowBatchTime(value: string) {
+    const date = new Date(value);
+    if (Number.isNaN(date.getTime())) return "未知";
+    const pad = (part: number) => String(part).padStart(2, "0");
+    return `${date.getFullYear()}${pad(date.getMonth() + 1)}${pad(date.getDate())}${pad(date.getHours())}${pad(date.getMinutes())}`;
+}