chore: v2.8.13 — Artifacts reinstall/edit/installs, agent steps in chat, pick a local file to attach, Windows paths as links

- Chat: an Agent step shows its task, status and tool calls and opens its conversation in place; Windows paths (E:\…, C:/…) in replies open as files
- Prompt: attach a file on this computer by path (native picker), clearer too-large messages
- Artifacts: edit title/description and a skill's files (new snapshot), Reinstall, install history, Hub-only rows, skills installed into ~/.claude/skills and ~/.agents/skills
- Files: batch upload of small files in one extract
- AI Tools: npm install falls back to --prefix ~/.local when the global prefix is not writable

client/src/pages/GitCredentialsConfig.tsx

@@ -107,7 +107,7 @@ export function GitCredentialsConfig() {
 
   return (
     <div className="space-y-4">
-      <div className="flex items-start justify-between gap-4">
+      <div className="flex items-center justify-between gap-4">
         {/* The page header above already names the section. */}
         <p className="max-w-2xl text-xs text-fg-muted">{t("gitCreds.description")}</p>
         <button
@@ -128,7 +128,7 @@ export function GitCredentialsConfig() {
 
       {form && (
         <form
-          className="grid max-w-2xl gap-2 rounded-lg border border-border p-3 sm:grid-cols-3"
+          className="grid gap-2 rounded-lg border border-border bg-surface-1 p-3 sm:grid-cols-3"
           onSubmit={(e) => {
             e.preventDefault();
             void save();
@@ -159,18 +159,18 @@ export function GitCredentialsConfig() {
             onChange={(e) => setForm({ ...form, token: e.target.value })}
             className={INPUT}
           />
-          <div className="flex gap-2 sm:col-span-3">
+          <div className="flex justify-end gap-2 sm:col-span-3">
             <button
               type="submit"
               disabled={saving || !form.url.trim() || !form.username.trim() || !form.token}
-              className="rounded border border-accent/40 bg-accent/15 px-3 py-1 text-xs text-accent hover:bg-accent/25 disabled:cursor-not-allowed disabled:opacity-40"
+              className="rounded-lg border border-accent/40 bg-accent/15 px-3 py-1.5 text-xs font-medium text-accent hover:bg-accent/25 disabled:cursor-not-allowed disabled:opacity-40"
             >
               {t("gitCreds.save")}
             </button>
             <button
               type="button"
               onClick={() => setForm(null)}
-              className="rounded border border-border-light px-3 py-1 text-xs text-fg-secondary hover:bg-surface-3"
+              className="rounded-lg border border-border-light px-3 py-1.5 text-xs text-fg-secondary hover:bg-surface-3"
             >
               {t("gitCreds.cancel")}
             </button>