Ship file viewer, editor improvements, and private package releases

packages/viewer/src/kinds.ts

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+import type { ViewerKind } from "./types.ts";
+
+/** Kind classification only; MIME ownership remains with uploader. */
+export const extensions: Record<ViewerKind, readonly string[]> = {
+  image: ["jpg", "jpeg", "png", "gif", "webp", "bmp", "ico", "avif"],
+  vector: ["svg"],
+  pdf: ["pdf"],
+  code: [
+    "js",
+    "jsx",
+    "ts",
+    "tsx",
+    "py",
+    "java",
+    "cpp",
+    "c",
+    "h",
+    "cs",
+    "css",
+    "json",
+    "xml",
+    "sql",
+    "sh",
+    "yaml",
+    "yml",
+  ],
+  text: ["txt", "md", "log"],
+  markup: ["html", "htm"],
+  sheet: ["csv", "tsv", "xls", "xlsx", "ods"],
+  doc: ["doc", "docx", "dotx", "odt", "rtf", "ppt", "pptx", "ppsx", "potx", "odp"],
+  audio: ["mp3", "wav", "aac", "flac", "ogg"],
+  video: ["mp4", "webm", "mov", "avi", "mkv"],
+  archive: ["zip", "rar", "7z", "tar", "gz", "tgz"],
+  binary: ["psd", "ai", "tif", "tiff", "exe", "dll"],
+};
+
+export function extensionOf(name: string): string {
+  const base = (name.split(/[?#]/)[0] ?? "").split(/[/\\]/).pop() ?? "";
+  const dot = base.lastIndexOf(".");
+  return dot < 0 ? "" : base.slice(dot).toLowerCase();
+}
+
+export function kindOfExtension(ext: string): ViewerKind {
+  return (
+    (Object.keys(extensions) as ViewerKind[]).find((kind) =>
+      extensions[kind].includes(ext.replace(/^\./, "").toLowerCase()),
+    ) ?? "binary"
+  );
+}
+
+export function kindOfMime(mime: string): ViewerKind | undefined {
+  const type = mime.split(";")[0]!.trim().toLowerCase();
+  if (type === "image/svg+xml") return "vector";
+  if (type === "text/html" || type === "application/xhtml+xml") return "markup";
+  if (type === "application/pdf") return "pdf";
+  if (/^(application|text)\/(json|xml|javascript|x-javascript)$/.test(type) || type === "text/css")
+    return "code";
+  if (/^text\/(csv|tab-separated-values)$/.test(type) || /spreadsheet|ms-excel/.test(type))
+    return "sheet";
+  if (/opendocument\.spreadsheet/.test(type)) return "sheet";
+  if (/msword|wordprocessing|presentation|powerpoint|opendocument|rtf/.test(type)) return "doc";
+  if (/zip|gzip|x-tar|x-7z|rar/.test(type)) return "archive";
+  if (/^image\/(png|jpeg|gif|webp|bmp|x-icon|vnd.microsoft.icon|avif)$/.test(type)) return "image";
+  if (type.startsWith("audio/")) return "audio";
+  if (type.startsWith("video/")) return "video";
+  if (type.startsWith("text/")) return "text";
+  return undefined;
+}