feat(dashboard): logout button + admin user-management window

Logout: new sidebar link 'Log out (username)' that POSTs /api/logout
(clears session cookie) and navigates to /login. Visible to everyone.
Replaces 'no logout functionality' state where users could only get
out by deleting cookies manually.

Admin window: new 'Admin · Users' window (only shown when current
user.is_admin) lists all users in a table with:
  - Add user (username + password + admin checkbox)
  - Reset password inline per row
  - Toggle admin per row
  - Delete user per row (blocked for self)
Wraps the existing /api-admin/users CRUD endpoints in main.py.

Plumbing: useCurrentUser hook fetches /me on mount; apiPatch+apiDelete
helpers added to api/client.ts; new endpoint wrappers exported from
api/endpoints.ts; AdminUsersWindow.tsx registered in WindowRenderer
under id prefix 'adminusers'; CSS for admin table/form/buttons and
the muted-red logout link.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

static/assets/StatsWindow-B6zfbHhl.js

@@ -0,0 +1 @@
+import{r as o,j as t,D as d}from"./index-3SHiQu4l.js";import"./react-yfL0ty4i.js";const c=[{title:"Kills per Hour",id:1},{title:"Memory (MB)",id:2},{title:"CPU (%)",id:3},{title:"Mem Handles",id:4}],m=[{label:"1H",value:"now-1h"},{label:"6H",value:"now-6h"},{label:"24H",value:"now-24h"},{label:"7D",value:"now-7d"}],v=({id:s,charName:a,zIndex:i})=>{const[l,r]=o.useState("now-24h"),n=e=>`/grafana/d-solo/dereth-tracker/dereth-tracker-dashboard?panelId=${e}&var-character=${encodeURIComponent(a)}&from=${l}&to=now&theme=light`;return t.jsxs(d,{id:s,title:`Stats: ${a}`,zIndex:i,width:750,height:480,children:[t.jsx("div",{className:"ml-stats-controls",children:m.map(e=>t.jsx("button",{className:`ml-stats-range-btn ${l===e.value?"active":""}`,onClick:()=>r(e.value),children:e.label},e.value))}),t.jsx("div",{className:"ml-stats-grid",children:c.map(e=>t.jsx("div",{className:"ml-stats-panel",children:t.jsx("iframe",{src:n(e.id),width:"100%",height:"100%",frameBorder:"0",title:e.title})},e.id))})]})};export{v as StatsWindow};