From cfc91e0a424163869c64d30e55d55a53f18a3dbf Mon Sep 17 00:00:00 2001
From: Christophe Besson <cbesson@gmail.com>
Date: Tue, 1 Sep 2026 14:08:32 +0200
Subject: refactor(node): JSON-only control API, Node page absorbs the admin
 dashboard

Remove the node daemon's server-rendered admin UI (GET / and /audit, the
_render_* helpers and inline templates) and the `meshbay-node ui` CLI verb.
The loopback control API stays; it is now JSON only, ruff-clean, and 453
lines (was 1074). Also drop three never-wired endpoints (/api/config,
/api/chat/history, /ws/chat, plus broadcast_chat) and the pointless
18000/tcp firewall profiles.

The desktop client's Node page (static/node-page.js) takes over what the
dashboard showed, reorganised into six tabs (Overview, Groups, Roster,
Peers, Audit, Settings):
- Overview: version, node id, QUIC port, hub, index-cache maintenance
- Roster: node-wide view with unpin
- Peers and Audit: auto-load on open, no Load button
- Audit: real usernames and group names (resolved from the roster and
  node.toml), Previous/Next pagination newest-first, Export CSV of every
  matching row
- Settings: node settings, STUN, ICE, denylist, then Unlink from hub

Backend: audit.get_entries gains `offset`; /api/audit and /api/peers
resolve ids to names via a new _display_names helper; CSP tightened to
default-src 'none' now that no HTML is served. draft-v6 sections 2.11 and
2.12 corrected -- the Node page uses the loopback API, not MNP.

One capability is intentionally dropped: browser-based admin on a headless
server. The CLI covers every operation there.

See docs/refactor-node-ui.md.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01MQCaZnde4Bjjdu84dhSuF5
---
 packages/meshbay-node/src/meshbay_node/ui/app.py | 727 +++--------------------
 1 file changed, 76 insertions(+), 651 deletions(-)

(limited to 'packages/meshbay-node/src/meshbay_node/ui/app.py')

diff --git a/packages/meshbay-node/src/meshbay_node/ui/app.py b/packages/meshbay-node/src/meshbay_node/ui/app.py
index 671597f..6fdc78f 100644
--- a/packages/meshbay-node/src/meshbay_node/ui/app.py
+++ b/packages/meshbay-node/src/meshbay_node/ui/app.py
@@ -1,34 +1,25 @@
 """
-MeshBay Node — local administration web UI (localhost:18000).
+MeshBay Node — local control API (loopback, default port 18000).
 
-FastAPI app providing:
-  - Dashboard: node status, connected peers, group overview
-  - Groups: file listing, shared directory info
-  - Peers: connected WebRTC/QUIC clients
-  - Audit log: IP + action log for legal compliance
-  - API endpoints for all data (JSON)
+A JSON-only FastAPI app: node status, groups and roots, roster and denylist,
+node settings, connected peers, and the audit log. It is the single control
+plane for the node — the `meshbay-node` CLI and the desktop client's Node page
+are both clients of it. (Chat is served to browsers over MNP/WebRTC, not here.)
 
-Served only on 127.0.0.1 — not exposed to the network.
-Gated by a per-run session token (11.5.3) — printed at daemon startup.
+Served only on 127.0.0.1 — never network-exposed — and every request is gated
+by a per-run session token (11.5.3) written to `<data_dir>/ui-token`. There is
+no server-rendered UI: the Node page ships in the desktop client (see
+`docs/refactor-node-ui.md`).
 """
 
 import asyncio
-import base64
-import json
 import logging
-import time
-from html import escape
-from pathlib import Path
 
-from fastapi import FastAPI, HTTPException, WebSocket, WebSocketDisconnect, Query
-from fastapi.responses import HTMLResponse, JSONResponse
+from fastapi import FastAPI, HTTPException, Query
+from fastapi.responses import JSONResponse
 
-from meshbay_node import __version__
-from meshbay_node import ops
-from meshbay_node.config import DEFAULT_CONFIG_PATH
+from meshbay_node import __version__, ops
 from meshbay_node.indexer.indexer import DirectoryIndexer
-from meshbay_common.crypto import generate_gek, wrap_gek_aes
-from meshbay_common.join import ROLE_MEMBER, ROLE_OPERATOR
 
 log = logging.getLogger(__name__)
 
@@ -50,6 +41,31 @@ def _op(coro):
     return run()
 
 
+async def _display_names(state: dict) -> tuple[dict[str, str], dict[str, str]]:
+    """(user_id -> username, group_id -> name) for rendering ids a human reads.
+
+    Usernames come from the roster (the node's own record); group names from
+    node.toml. Both are best-effort — a missing entry just leaves the caller
+    with the raw id to shorten.
+    """
+    users: dict[str, str] = {}
+    roster = state.get("roster")
+    if roster:
+        try:
+            for ident in await roster.list_identities():
+                if ident.get("username"):
+                    users[ident["user_id"]] = ident["username"]
+        except Exception:
+            pass
+    groups: dict[str, str] = {}
+    config = state.get("config")
+    if config:
+        for g in config.groups:
+            if getattr(g, "id", None):
+                groups[g.id] = g.name
+    return users, groups
+
+
 
 def create_ui_app(state: dict) -> FastAPI:
     app = FastAPI(
@@ -62,14 +78,14 @@ def create_ui_app(state: dict) -> FastAPI:
     @app.middleware("http")
     async def _require_session_token(request, call_next):
         """
-        Gate the admin UI behind a per-run token (11.5.3).
+        Gate the control API behind a per-run token (11.5.3).
 
         "localhost only" is weaker than it sounds: any process on the machine can
         reach it, and a page in the operator's browser can reach it too via DNS
         rebinding. Since this API can re-initialise a group's GEK and read the
         audit log, an unauthenticated loopback service is a privilege boundary
-        waiting to be crossed. The token is printed at startup and accepted as
-        ?t= or the X-MeshBay-Token header.
+        waiting to be crossed. The token is written to `<data_dir>/ui-token` at
+        startup and accepted as ?t= or the X-MeshBay-Token header.
         """
         from fastapi.responses import PlainTextResponse
 
@@ -84,25 +100,17 @@ def create_ui_app(state: dict) -> FastAPI:
     @app.middleware("http")
     async def _security_headers(request, call_next):
         """
-        Defence in depth behind the escaping fixes for H2. This UI is unauthenticated
-        on loopback, so script execution here equals full control of the node admin API.
-
-        Note what this does and does not do: the page relies on inline <script>, so
-        script-src must allow 'unsafe-inline' and CSP therefore does NOT prevent an
-        injected script from running. Escaping is the actual fix. What CSP buys is
-        containment — connect-src/img-src/form-action 'self'|'none' stop an injected
-        script from exfiltrating the audit log or config to an external host.
+        Belt-and-braces for a loopback API that returns only JSON. Since the
+        server no longer renders any HTML (the dashboard was removed
+        2026-09-01), the response has nothing an injected script could live in
+        — but a DNS-rebound page or a content-sniffing client that manages to
+        treat a body as a document still gets `default-src 'none'`, which
+        forbids every fetch, script, style and frame. `nosniff` stops the
+        sniffing in the first place.
         """
         response = await call_next(request)
         response.headers["Content-Security-Policy"] = (
-            "default-src 'none'; "
-            "style-src 'unsafe-inline'; "
-            "script-src 'unsafe-inline'; "
-            "connect-src 'self'; "
-            "img-src 'self' data:; "
-            "form-action 'none'; "
-            "frame-ancestors 'none'; "
-            "base-uri 'none'"
+            "default-src 'none'; frame-ancestors 'none'; base-uri 'none'"
         )
         response.headers["X-Content-Type-Options"] = "nosniff"
         response.headers["Referrer-Policy"] = "no-referrer"
@@ -126,7 +134,6 @@ def create_ui_app(state: dict) -> FastAPI:
         if status == "running":
             roster = state.get("roster")
             if roster:
-                from meshbay_node.roster import Roster
                 members = await roster.list_members()
                 operators = [m for m in members
                              if m["role"] == "operator" and m["status"] == "active"]
@@ -239,14 +246,18 @@ def create_ui_app(state: dict) -> FastAPI:
         webrtc = state.get("webrtc")
         if not webrtc:
             return {"peers": []}
+        users, groups = await _display_names(state)
         peers = []
         for pid, session in list(webrtc._sessions.items()):
             from meshbay_node.transport.webrtc_server import _get_remote_ip
+            uid = session._user_id or ""
+            gid = session._group_id or ""
             peers.append({
                 "peer_id": pid,
-                "user_id": session._user_id or "",
-                "username": session._username or "",
-                "group_id": session._group_id or "",
+                "user_id": uid,
+                "username": session._username or users.get(uid, ""),
+                "group_id": gid,
+                "group_name": groups.get(gid, ""),
                 "remote_ip": session._remote_ip or _get_remote_ip(session._pc),
                 "state": session._pc.connectionState,
             })
@@ -256,60 +267,44 @@ def create_ui_app(state: dict) -> FastAPI:
     async def api_audit(
         since: float = 0,
         limit: int = 200,
+        offset: int = 0,
         user_id: str | None = Query(default=None),
         event: str | None = Query(default=None),
     ):
         audit = state.get("audit_store")
         if not audit:
-            return {"entries": []}
-        entries = await audit.get_entries(
-            since=since, limit=limit, user_id=user_id, event=event)
+            return {"entries": [], "offset": 0, "limit": limit, "has_more": False}
+        limit = max(1, min(limit, 1000))
+        offset = max(0, offset)
+        # Fetch one extra row to know whether a next page exists without a count.
+        rows = await audit.get_entries(
+            since=since, limit=limit + 1, offset=offset,
+            user_id=user_id, event=event)
+        has_more = len(rows) > limit
+        entries = rows[:limit]
+
+        # Legacy rows and pre-handshake events store user_id only; group_id is
+        # never a name. Resolve both for display — no migration, the roster and
+        # node.toml are the node's own records.
+        names, groups = await _display_names(state)
+
         return {
+            "offset": offset,
+            "limit": limit,
+            "has_more": has_more,
             "entries": [
                 {
                     "id": e.id,
                     "timestamp": e.timestamp,
                     "user_id": e.user_id,
-                    "username": e.username,
+                    "username": e.username or names.get(e.user_id, ""),
                     "ip": e.ip,
                     "event": e.event,
                     "group_id": e.group_id,
+                    "group_name": groups.get(e.group_id, ""),
                     "detail": e.detail,
                 }
                 for e in entries
-            ]
-        }
-
-    @app.get("/api/config")
-    async def api_config():
-        config = state.get("config")
-        if not config:
-            return {}
-        return {
-            "hub_url": config.hub.url,
-            "username": config.hub.username,
-            "quic_port": config.node.quic_port,
-            "ui_port": config.node.ui_port,
-            "data_dir": str(config.data_dir),
-            "settings": {
-                "invite_ttl_hours": config.node.invite_ttl_hours,
-                "pair_ttl_hours": config.node.pair_ttl_hours,
-                "device_request_ttl_minutes": config.node.device_request_ttl_minutes,
-                "max_concurrent_streams": config.node.max_concurrent_streams,
-                "transcode_incompatible_video": config.node.transcode_incompatible_video,
-            },
-            "groups": [
-                {
-                    "id": g.id,
-                    "name": g.name,
-                    "roots": [
-                        {"path": r.path, "name": r.name, "kind": r.kind,
-                         "upload": r.upload}
-                        for r in g.roots
-                    ],
-                    "visibility": g.visibility,
-                }
-                for g in config.groups
             ],
         }
 
@@ -455,574 +450,4 @@ def create_ui_app(state: dict) -> FastAPI:
     async def update_node_settings(payload: dict):
         return await _op(lambda: ops.set_node_settings(state, payload))
 
-    # ── Chat endpoints ───────────────────────────────────────────────────────
-
-    _chat_subscribers: list[WebSocket] = []
-
-    @app.get("/api/chat/history")
-    async def chat_history(since: float = 0, limit: int = 100):
-        chat_store = state.get("chat_store")
-        if not chat_store:
-            return {"messages": []}
-        msgs = await chat_store.get_messages(since=since, limit=limit)
-        return {
-            "messages": [
-                {
-                    "id": m.id,
-                    "sender_id": m.sender_id,
-                    "iteration": m.iteration,
-                    "timestamp": m.timestamp,
-                    "thread_id": m.thread_id,
-                }
-                for m in msgs
-            ]
-        }
-
-    @app.websocket("/ws/chat")
-    async def chat_websocket(ws: WebSocket):
-        await ws.accept()
-        _chat_subscribers.append(ws)
-        try:
-            while True:
-                await ws.receive_text()
-        except WebSocketDisconnect:
-            pass
-        finally:
-            _chat_subscribers.remove(ws)
-
-    async def broadcast_chat_to_ui(msg: dict) -> None:
-        payload = json.dumps(msg)
-        dead = []
-        for ws in _chat_subscribers:
-            try:
-                await ws.send_text(payload)
-            except Exception:
-                dead.append(ws)
-        for ws in dead:
-            _chat_subscribers.remove(ws)
-
-    app.broadcast_chat = broadcast_chat_to_ui
-
-    # ── HTML UI ──────────────────────────────────────────────────────────────
-
-    @app.get("/", response_class=HTMLResponse)
-    async def root():
-        # Roster reads are async and the page renderer is not, so gather here.
-        roster = state.get("roster")
-        roster_view = None
-        if roster:
-            identities = {i["user_id"]: i for i in await roster.list_identities()}
-            roster_view = {
-                "identities": identities,
-                "members": await roster.list_members(),
-                "invites": await roster.list_invites(),
-            }
-        index_cache = state.get("index_cache")
-        cache_count = await index_cache.count() if index_cache else None
-        return _render_page(state, roster_view, cache_count)
-
-    @app.get("/audit", response_class=HTMLResponse)
-    async def audit_page():
-        return _render_audit_page(state.get("ui_token", ""))
-
     return app
-
-
-def _fmt_size(n: int) -> str:
-    if n < 1024:
-        return f"{n} B"
-    if n < 1024 * 1024:
-        return f"{n / 1024:.1f} KB"
-    if n < 1024 * 1024 * 1024:
-        return f"{n / (1024 * 1024):.1f} MB"
-    return f"{n / (1024 * 1024 * 1024):.2f} GB"
-
-
-def _render_node_settings(config) -> str:
-    if not config:
-        return ""
-    nd = config.node
-    transcode = "on" if nd.transcode_incompatible_video else "off"
-    return f"""
-    <table style="margin-top:10px">
-      <thead><tr><th>Setting</th><th>Value</th></tr></thead>
-      <tbody>
-        <tr><td>Invitation TTL</td><td>{nd.invite_ttl_hours} hours</td></tr>
-        <tr><td>Pairing code TTL</td><td>{nd.pair_ttl_hours} hours</td></tr>
-        <tr><td>Device request TTL</td><td>{nd.device_request_ttl_minutes} minutes</td></tr>
-        <tr><td>Max concurrent streams</td><td>{nd.max_concurrent_streams}</td></tr>
-        <tr><td>Transcode incompatible video</td><td>{transcode}</td></tr>
-      </tbody>
-    </table>"""
-
-
-def _render_roster(roster_view: dict | None) -> str:
-    """
-    Who this node recognises, and which keys are theirs.
-
-    Every value here is escaped: usernames come from the hub and pass through the
-    roster, so they are attacker-influenced text on the operator's own admin page
-    (the H2 rule applies to them exactly as it does to filenames).
-    """
-    if roster_view is None:
-        return '<p class="muted">Roster unavailable</p>'
-
-    identities = roster_view["identities"]
-    rows = ""
-    for m in roster_view["members"]:
-        ident = identities.get(m["user_id"], {})
-        scope = escape(m["group_id"][:8]) if m["group_id"] else "node-wide"
-        status_color = "#22c55e" if m["status"] == "active" else "#ef4444"
-        rows += (
-            f"<tr><td>{escape(str(ident.get('username') or m['user_id']))}</td>"
-            f"<td>{escape(str(m['role']))}</td>"
-            f"<td><span class='badge' style='background:{status_color}'>"
-            f"{escape(str(m['status']))}</span></td>"
-            f"<td>{scope}</td>"
-            f"<td><code>{escape(str(ident.get('pk_ed25519', ''))[:16])}…</code></td>"
-            f"<td>{escape(str(ident.get('pinned_at', '?')))} "
-            f"({escape(str(ident.get('pinned_via', '?')))})</td></tr>"
-        )
-    if not rows:
-        rows = ('<tr><td colspan="6" class="muted">Nobody admitted yet — '
-                'run <code>meshbay-node member invite &lt;username&gt;</code></td></tr>')
-
-    invite_rows = ""
-    for i in roster_view["invites"]:
-        invite_rows += (
-            f"<tr><td><code>{escape(str(i['user_id'])[:16])}</code></td>"
-            f"<td>{escape(str(i['group_id'][:8] or 'node-wide'))}</td>"
-            f"<td>{escape(str(i['role']))}</td>"
-            f"<td>{escape(str(i['expires_at']))}</td></tr>"
-        )
-    invites_html = ""
-    if invite_rows:
-        invites_html = f"""
-        <details style="margin-top:10px"><summary>Pending invitations</summary>
-        <table>
-          <thead><tr><th>Account</th><th>Group</th><th>Role</th><th>Expires</th></tr></thead>
-          <tbody>{invite_rows}</tbody>
-        </table>
-        </details>"""
-
-    return f"""
-    <table>
-      <thead><tr><th>User</th><th>Role</th><th>Status</th><th>Scope</th>
-                 <th>Identity key</th><th>Pinned</th></tr></thead>
-      <tbody>{rows}</tbody>
-    </table>
-    {invites_html}
-    <p class="muted" style="margin-top:8px">
-      Codes are issued from the CLI: <code>meshbay-node operator pair</code>,
-      <code>meshbay-node member invite &lt;username&gt;</code>. They never pass
-      through the hub.
-    </p>"""
-
-
-def _render_page(state: dict, roster_view: dict | None = None,
-                 index_cache_count: int | None = None) -> str:
-    token_js = json.dumps(state.get("ui_token", ""))
-    status = state.get("status", "starting")
-    indexes = state.get("indexes", {})
-    groups_ctx = state.get("groups_ctx", {})
-    config = state.get("config")
-    webrtc = state.get("webrtc")
-    total_files = sum(idx.count for idx in indexes.values())
-    peer_count = webrtc.active_peers if webrtc else 0
-    status_color = {
-        "running": "#22c55e", "error": "#ef4444",
-        "waiting_for_node_key": "#f97316",
-    }.get(status, "#f59e0b")
-
-    # Groups section
-    groups_html = ""
-    for gid, ctx in groups_ctx.items():
-        cfg = None
-        if config:
-            cfg = next((g for g in config.groups if g.id == gid), None)
-        idx = ctx.get("index")
-        name = cfg.name if cfg else gid[:8]
-        roots = ctx.get("roots")
-        # An unavailable root is shown as such rather than hidden: its files are
-        # still listed and still in the index, and hiding the root would make a
-        # frozen library look deleted — the exact confusion this is meant to
-        # prevent.
-        shared = ", ".join(
-            f"{r.name} → {r.path}" + ("" if r.available else "  [UNAVAILABLE]")
-            for r in roots
-        ) if roots else ""
-        vis = cfg.visibility if cfg else "private"
-        fcount = idx.count if idx else 0
-        total_size = sum(e.size for e in idx.entries) if idx else 0
-
-        # Everything interpolated below is attacker-controlled: filenames come from
-        # uploads by any group member. Rendering them raw was a stored XSS into the
-        # unauthenticated localhost admin UI, i.e. full control of the node admin API
-        # from the operator's browser (finding H2).
-        file_rows = ""
-        if idx:
-            for e in sorted(idx.entries, key=lambda x: x.name):
-                file_rows += (
-                    f"<tr><td>{escape(e.name)}</td><td>{escape(e.type)}</td>"
-                    f"<td>{_fmt_size(e.size)}</td><td>{escape(e.path or '/')}</td></tr>"
-                )
-
-        has_gek = bool(ctx.get("gek"))
-        gek_badge = (
-            '<span class="badge" style="background:#22c55e">GEK active</span>'
-            if has_gek
-            else '<span class="badge" style="background:#ef4444">No GEK</span>'
-        )
-        gek_label = "Re-wrap GEK for all members" if has_gek else "Initialize GEK"
-        gek_color = "#3b82f6" if has_gek else "#22c55e"
-        gek_action = f"""
-            <div style="margin:10px 0">
-              <button onclick="initGEK('{gid}')"
-                id="gek-btn-{gid[:8]}"
-                style="padding:8px 16px;background:{gek_color};color:#fff;border:none;
-                border-radius:6px;cursor:pointer;font-size:0.85em">
-                {gek_label}
-              </button>
-              <span id="gek-status-{gid[:8]}" class="muted" style="margin-left:8px"></span>
-            </div>"""
-
-        groups_html += f"""
-        <div class="card">
-          <h3>{escape(str(name))}
-            <span class="badge" style="background:#6366f1">{escape(str(vis))}</span>
-            {gek_badge}
-          </h3>
-          <p><b>Directory:</b> <code>{escape(str(shared))}</code></p>
-          <p><b>Files:</b> {fcount} &mdash; <b>Total:</b> {_fmt_size(total_size)}</p>
-          {gek_action}
-          <p class="muted">ID: {escape(gid)}</p>
-          <details><summary>File list</summary>
-          <table>
-            <thead><tr><th>Name</th><th>Type</th><th>Size</th><th>Path</th></tr></thead>
-            <tbody>{file_rows}</tbody>
-          </table>
-          </details>
-        </div>"""
-
-    # Peers section
-    peers_html = ""
-    if webrtc:
-        for pid, session in list(webrtc._sessions.items()):
-            from meshbay_node.transport.webrtc_server import _get_remote_ip
-            ip = session._remote_ip or _get_remote_ip(session._pc)
-            peers_html += (
-                f"<tr><td>{escape(session._username or session._user_id or '—')}</td>"
-                f"<td>{escape(ip or '—')}</td>"
-                f"<td>{escape(session._group_id[:8] if session._group_id else '—')}</td>"
-                f"<td>{escape(session._pc.connectionState)}</td></tr>"
-            )
-    if not peers_html:
-        peers_html = '<tr><td colspan="4" class="muted">No connected peers</td></tr>'
-
-    return f"""<!DOCTYPE html>
-<html lang="en">
-<head>
-<meta charset="utf-8">
-<title>MeshBay Node Admin</title>
-<meta name="viewport" content="width=device-width,initial-scale=1">
-<style>
-  :root {{
-    --bg: #0f172a; --surface: #1e293b; --border: #334155;
-    --text: #e2e8f0; --muted: #94a3b8; --accent: #3b82f6;
-    --green: #22c55e; --red: #ef4444; --yellow: #f59e0b;
-  }}
-  * {{ box-sizing: border-box; margin: 0; padding: 0; }}
-  body {{ font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
-          background: var(--bg); color: var(--text); }}
-  .container {{ max-width: 1000px; margin: 0 auto; padding: 20px; }}
-  h1 {{ font-size: 1.5em; margin-bottom: 20px; }}
-  h2 {{ font-size: 1.2em; margin: 24px 0 12px; border-bottom: 1px solid var(--border); padding-bottom: 6px; }}
-  h3 {{ font-size: 1em; margin-bottom: 8px; }}
-  .badge {{ display: inline-block; padding: 2px 8px; border-radius: 4px;
-            color: #fff; font-size: 0.8em; font-weight: 600; vertical-align: middle; }}
-  .stats {{ display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
-            gap: 12px; margin-bottom: 20px; }}
-  .stat {{ background: var(--surface); border: 1px solid var(--border); border-radius: 8px;
-           padding: 16px; text-align: center; }}
-  .stat .value {{ font-size: 1.8em; font-weight: 700; color: var(--accent); }}
-  .stat .label {{ font-size: 0.8em; color: var(--muted); margin-top: 4px; }}
-  .card {{ background: var(--surface); border: 1px solid var(--border);
-           border-radius: 8px; padding: 16px; margin-bottom: 12px; }}
-  table {{ width: 100%; border-collapse: collapse; font-size: 0.85em; margin-top: 8px; }}
-  th, td {{ padding: 6px 10px; text-align: left; border-bottom: 1px solid var(--border); }}
-  th {{ color: var(--muted); font-weight: 600; font-size: 0.75em; text-transform: uppercase; }}
-  code {{ background: var(--border); padding: 2px 6px; border-radius: 3px; font-size: 0.85em; }}
-  .muted {{ color: var(--muted); font-size: 0.85em; }}
-  details summary {{ cursor: pointer; color: var(--accent); font-size: 0.85em; margin-top: 8px; }}
-  a {{ color: var(--accent); text-decoration: none; }}
-  a:hover {{ text-decoration: underline; }}
-  nav {{ display: flex; gap: 16px; margin-bottom: 20px; }}
-  nav a {{ padding: 6px 12px; border-radius: 6px; background: var(--surface);
-           border: 1px solid var(--border); }}
-  nav a:hover {{ background: var(--border); text-decoration: none; }}
-  .footer {{ margin-top: 32px; padding-top: 12px; border-top: 1px solid var(--border);
-             font-size: 0.8em; color: var(--muted); }}
-</style>
-</head>
-<body>
-<div class="container">
-  <h1>MeshBay Node <span class="badge" style="background:{status_color}">{status}</span></h1>
-
-  <nav>
-    <a href="/">Dashboard</a>
-    <a href="/audit">Audit Log</a>
-    <a href="/api/status">API</a>
-  </nav>
-
-  <div class="stats">
-    <div class="stat"><div class="value">{len(groups_ctx)}</div><div class="label">Groups</div></div>
-    <div class="stat"><div class="value">{total_files}</div><div class="label">Files</div></div>
-    <div class="stat"><div class="value">{peer_count}</div><div class="label">Connected Peers</div></div>
-    <div class="stat">
-      <div class="value" style="font-size:1em;word-break:break-all">{state.get("username", "—")}</div>
-      <div class="label">User</div>
-    </div>
-  </div>
-
-  <h2>Connected Peers</h2>
-  <table>
-    <thead><tr><th>User</th><th>IP</th><th>Group</th><th>State</th></tr></thead>
-    <tbody>{peers_html}</tbody>
-  </table>
-
-  <h2>Roster</h2>
-  {_render_roster(roster_view)}
-
-  <h2>Groups</h2>
-  {groups_html or '<p class="muted">No groups configured</p>'}
-
-  <h2>Node Configuration</h2>
-  <div class="card">
-    <p><b>Hub:</b> {state.get("hub_url", "—")}</p>
-    <p><b>QUIC port:</b> {state.get("quic_port", "—")}</p>
-    <p><b>Node ID:</b> <code>{state.get("endpoint_hint") or "—"}</code></p>
-    {_render_node_settings(config)}
-  </div>
-
-  <h2>Maintenance</h2>
-  <div class="card">
-    <p><b>Index cache:</b> <span id="cacheCount">{
-      index_cache_count if index_cache_count is not None else "—"
-    }</span> path(s) remembered (size/mtime → hash, shared by every group)</p>
-    <p class="muted">Removes rows whose path no longer belongs to any group's
-       root, or whose file is genuinely gone from a root that is currently
-       reachable. Never touches a root that is temporarily unavailable
-       (unplugged drive) — that one still needs its full cache back the
-       moment it returns.</p>
-    <div style="margin:10px 0">
-      <button onclick="pruneIndexCache()" id="prune-cache-btn"
-        style="padding:8px 16px;background:#3b82f6;color:#fff;border:none;
-        border-radius:6px;cursor:pointer;font-size:0.85em">
-        Prune stale entries
-      </button>
-      <span id="prune-cache-status" class="muted" style="margin-left:8px"></span>
-    </div>
-  </div>
-
-  <h2>Link Node to Hub Account</h2>
-  <div class="card">
-    <p>To connect to your group from a browser, link this node to your hub account.
-       Copy the key below and paste it in <b>Settings &gt; Link Node</b> on the hub.</p>
-    <div style="margin:12px 0;display:flex;align-items:center;gap:8px">
-      <code id="nodeKey" style="flex:1;padding:8px;word-break:break-all;background:var(--border);
-        border-radius:4px;font-size:0.9em;user-select:all">{state.get("pk_node_ed25519", "—")}</code>
-      <button onclick="navigator.clipboard.writeText(document.getElementById('nodeKey').textContent).then(()=>{{this.textContent='Copied!';setTimeout(()=>this.textContent='Copy',2000)}})"
-        style="padding:8px 16px;background:var(--accent);color:#fff;border:none;border-radius:6px;
-        cursor:pointer;font-size:0.85em;white-space:nowrap">Copy</button>
-    </div>
-    <p class="muted">This is the node's Ed25519 public key. It's safe to share — it identifies
-       this node but cannot be used to impersonate it.</p>
-  </div>
-
-  <div class="footer">
-    MeshBay Node v{__version__} &mdash; localhost only &mdash;
-    <a href="/api/status">status</a> &middot;
-    <a href="/api/groups">groups</a> &middot;
-    <a href="/api/peers">peers</a> &middot;
-    <a href="/api/audit">audit</a> &middot;
-    <a href="/api/config">config</a>
-    &mdash; auto-refresh 10s
-  </div>
-</div>
-<script>
-const TOKEN = {token_js};
-async function initGEK(groupId) {{
-  const btn = document.getElementById('gek-btn-' + groupId.slice(0,8));
-  const status = document.getElementById('gek-status-' + groupId.slice(0,8));
-  if (btn) btn.disabled = true;
-  if (status) status.textContent = 'Initializing...';
-  try {{
-    const resp = await fetch('/api/groups/' + groupId + '/gek?t=' + TOKEN, {{ method: 'POST' }});
-    const data = await resp.json();
-    if (resp.ok) {{
-      if (status) status.textContent = 'GEK initialized — '
-        + data.authorized_members + ' authorized member(s) get it on connect';
-      if (status) status.style.color = '#22c55e';
-      setTimeout(() => location.reload(), 2000);
-    }} else {{
-      if (status) status.textContent = data.error || 'Failed';
-      if (status) status.style.color = '#ef4444';
-      if (btn) btn.disabled = false;
-    }}
-  }} catch (e) {{
-    if (status) status.textContent = 'Error: ' + e.message;
-    if (status) status.style.color = '#ef4444';
-    if (btn) btn.disabled = false;
-  }}
-}}
-async function pruneIndexCache() {{
-  const btn = document.getElementById('prune-cache-btn');
-  const status = document.getElementById('prune-cache-status');
-  if (btn) btn.disabled = true;
-  if (status) {{ status.textContent = 'Pruning...'; status.style.color = ''; }}
-  try {{
-    const resp = await fetch('/api/index-cache/prune?t=' + TOKEN, {{ method: 'POST' }});
-    const data = await resp.json();
-    if (resp.ok) {{
-      if (status) status.textContent = 'Removed ' + data.removed + ', kept ' + data.kept;
-      if (status) status.style.color = '#22c55e';
-      const count = document.getElementById('cacheCount');
-      if (count) count.textContent = data.kept;
-    }} else {{
-      if (status) status.textContent = data.error || 'Failed';
-      if (status) status.style.color = '#ef4444';
-    }}
-  }} catch (e) {{
-    if (status) status.textContent = 'Error: ' + e.message;
-    if (status) status.style.color = '#ef4444';
-  }} finally {{
-    if (btn) btn.disabled = false;
-  }}
-}}
-setTimeout(()=>location.reload(), 10000);
-</script>
-</body>
-</html>"""
-
-
-def _render_audit_page(token: str = "") -> str:
-    return _AUDIT_HTML.replace("__TOKEN__", json.dumps(token))
-
-
-_AUDIT_HTML = """<!DOCTYPE html>
-<html lang="en">
-<head>
-<meta charset="utf-8">
-<title>MeshBay Node — Audit Log</title>
-<meta name="viewport" content="width=device-width,initial-scale=1">
-<style>
-  :root {
-    --bg: #0f172a; --surface: #1e293b; --border: #334155;
-    --text: #e2e8f0; --muted: #94a3b8; --accent: #3b82f6;
-  }
-  * { box-sizing: border-box; margin: 0; padding: 0; }
-  body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
-         background: var(--bg); color: var(--text); }
-  .container { max-width: 1100px; margin: 0 auto; padding: 20px; }
-  h1 { font-size: 1.5em; margin-bottom: 16px; }
-  nav { display: flex; gap: 16px; margin-bottom: 20px; }
-  nav a { padding: 6px 12px; border-radius: 6px; background: var(--surface);
-          border: 1px solid var(--border); color: var(--accent); text-decoration: none; }
-  nav a:hover { background: var(--border); }
-  .filters { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
-  .filters select, .filters input {
-    background: var(--surface); color: var(--text); border: 1px solid var(--border);
-    padding: 6px 10px; border-radius: 6px; font-size: 0.85em;
-  }
-  table { width: 100%; border-collapse: collapse; font-size: 0.82em; }
-  th, td { padding: 5px 8px; text-align: left; border-bottom: 1px solid var(--border); }
-  th { color: var(--muted); font-weight: 600; font-size: 0.75em; text-transform: uppercase;
-       position: sticky; top: 0; background: var(--bg); }
-  .muted { color: var(--muted); }
-  #count { margin-bottom: 10px; font-size: 0.85em; color: var(--muted); }
-</style>
-</head>
-<body>
-<div class="container">
-  <h1>Audit Log</h1>
-  <nav><a id="navHome" href="/">Dashboard</a><a id="navAudit" href="/audit">Audit Log</a></nav>
-
-  <div class="filters">
-    <select id="eventFilter">
-      <option value="">All events</option>
-      <option value="handshake">handshake</option>
-      <option value="file_download">file_download</option>
-      <option value="file_upload">file_upload</option>
-      <option value="file_delete">file_delete</option>
-      <option value="stream_video">stream_video</option>
-      <option value="chat_message">chat_message</option>
-      <option value="disconnect">disconnect</option>
-      <option value="auth_failed">auth_failed</option>
-    </select>
-    <input id="userFilter" placeholder="Filter by user..." />
-    <select id="limitSelect">
-      <option value="100">100 entries</option>
-      <option value="500">500 entries</option>
-      <option value="1000">1000 entries</option>
-    </select>
-  </div>
-
-  <div id="count"></div>
-  <table>
-    <thead><tr><th>Time</th><th>Event</th><th>User</th><th>IP</th><th>Group</th><th>Detail</th></tr></thead>
-    <tbody id="tbody"></tbody>
-  </table>
-</div>
-<script>
-const TOKEN = __TOKEN__;
-async function load() {
-  const ev = document.getElementById('eventFilter').value;
-  const limit = document.getElementById('limitSelect').value;
-  let url = '/api/audit?limit=' + limit + (TOKEN ? '&t=' + TOKEN : '');
-  if (ev) url += '&event=' + ev;
-  const r = await fetch(url);
-  const data = await r.json();
-  const tbody = document.getElementById('tbody');
-  document.getElementById('count').textContent = data.entries.length + ' entries';
-  // textContent, not innerHTML: e.detail carries filenames chosen by group members
-  // (finding H2). Building this row with string concatenation was a stored XSS.
-  tbody.replaceChildren(...data.entries.map(e => {
-    const tr = document.createElement('tr');
-    const cells = [
-      new Date(e.timestamp * 1000).toLocaleString(),
-      e.event,
-      e.username || (e.user_id || '').slice(0, 8),
-      e.ip || '—',
-      e.group_id ? e.group_id.slice(0, 8) : '—',
-      e.detail || '',
-    ];
-    for (const value of cells) {
-      const td = document.createElement('td');
-      td.textContent = value;
-      tr.appendChild(td);
-    }
-    return tr;
-  }));
-}
-for (const [id, href] of [['navHome','/'],['navAudit','/audit']]) {
-  const el = document.getElementById(id);
-  if (el && TOKEN) el.href = href + '?t=' + TOKEN;
-}
-document.getElementById('eventFilter').onchange = load;
-document.getElementById('limitSelect').onchange = load;
-let debounceTimer;
-document.getElementById('userFilter').oninput = function() {
-  clearTimeout(debounceTimer);
-  debounceTimer = setTimeout(() => {
-    const val = this.value;
-    const rows = document.querySelectorAll('#tbody tr');
-    rows.forEach(r => {
-      r.style.display = r.textContent.toLowerCase().includes(val.toLowerCase()) ? '' : 'none';
-    });
-  }, 200);
-};
-load();
-setInterval(load, 15000);
-</script>
-</body>
-</html>"""
-- 
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