chore: v2.8.15 — Oh My Pi login sharing, omp --allow-home, Markdown Preview default, first-login password

- omp-share.js: an admin's switch (S3) runs omp's own auth broker + gateway as
  the host on loopback; a member's omp pane reaches it as a scoped client keyed
  by its pane token (clients file = live omp panes only), runs on
  --model agenthub/<model>, never holds a credential.
- omp catalog: --allow-home, so a workspace at the account's home keeps its
  sessions there (they were recorded under a temp dir and dropped).
- Settings → Appearance → Open Markdown as: Preview (default) or Raw, for
  Files/Changes, the config viewer and a chat's file panel.
- First-login password change and password rules, avatar URLs, Artifacts
  "Mine" includes installed shared skills/plugins, a member's own hook pages.

client/src/components/config/FileViewer.tsx

@@ -4,7 +4,8 @@
  * already-fetched data as props (path/data/error) rather than fetching
  * itself, so it stays tool-agnostic — the orchestrator (Claude or Codex
  * config page) owns the fetch. A markdown file gets a Raw / Preview switch
- * (`MarkdownPreview`); Raw is the default.
+ * (`MarkdownPreview`), opening as Settings → Appearance says
+ * (`lib/markdownView.ts`: Preview by default).
  * @author Nguyễn Ngọc Trí Vĩ <vinnt@smartgift.vn>
  */
 
@@ -15,6 +16,7 @@ import { FileText, X, AlertCircle, Eye, Code2 } from "lucide-react";
 import type { CcFileResponse } from "../../lib/api";
 import { CopyButton } from "./configPrimitives";
 import { MarkdownPreview, isMarkdown } from "../MarkdownPreview";
+import { readMarkdownPreview } from "../../lib/markdownView";
 
 export function FileViewer({
   state,
@@ -24,7 +26,7 @@ export function FileViewer({
   onClose: () => void;
 }) {
   const { t } = useTranslation("ccConfig");
-  const [preview, setPreview] = useState(false);
+  const [preview, setPreview] = useState(readMarkdownPreview);
   const canPreview = isMarkdown(state.path) && !!state.data;
   const panelRef = useRef<HTMLDivElement>(null);
   useDialog(true, panelRef, onClose);