Keep Tailwind's scan off the server-side folders

The task work added ref strings ([file:ID], [bot:3]) in new prompt and tool
files, so the warning about "file" not being a known CSS property came back:
Tailwind read them as arbitrary-property utilities and emitted `file: ID`.

The exclusion list now covers every server-side directory whole instead of
one file at a time (none of them holds a className, so nothing is lost), and
`dict` stays scanned for the static hue classes. The ref literals that must
live in scanned files are reworded in comments, and task-file-row builds its
chip through `fileRef` rather than its own template literal.

src/components/general/task-file-row.tsx

@@ -3,6 +3,7 @@ import Link from "@moduletrace/twui/layout/Link";
 import { FileText, Image as ImageIcon } from "lucide-react";
 import Span from "@moduletrace/twui/layout/Span";
 import type { TaskFile } from "@/src/types";
+import fileRef from "@/src/utils/file-ref";
 
 type Props = {
     file: TaskFile;
@@ -15,8 +16,9 @@ type Props = {
 
 /**
  * One file on a task: its name, opening the bytes at
- * `/media/private/<id>`, and its `[file:ID]` chip when it lives in a bot's
- * or workspace's folder (so the file's real home is reachable too).
+ * `/media/private/<id>`, and its file ref (built by `fileRef`) when it
+ * lives in a bot's or workspace's folder (so the file's real home is
+ * reachable too).
  */
 export default function TaskFileRow({ file, onDetach, busy }: Props) {
     if (file.missing) {
@@ -51,7 +53,7 @@ export default function TaskFileRow({ file, onDetach, busy }: Props) {
             ) : null}
             {file.bot_file_id ? (
                 <Span className="shrink-0 text-[11px] leading-4 text-ink-secondary">
-                    {`[file:${file.bot_file_id}]`}
+                    {fileRef({ id: file.bot_file_id })}
                 </Span>
             ) : null}
             {onDetach ? (