Add inline level editing in admin queue and roadmap infographic on start page

- Admin: Level column is now a dropdown of the 8 premium levels (Scintilla
  through Corona), saving immediately via PATCH; server validates levels.
- Start page: RM Circle Team Build Roadmap graphic above the fold with
  Crypto Team Build Network attribution (compressed to 198KB WebP).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

server.js

@@ -14,6 +14,7 @@ const CONFIG_FILE = path.join(DATA_DIR, 'config.json');
 const ADMIN_PASSWORD = process.env.ADMIN_PASSWORD || 'changeme';
 const IS_PROD = process.env.NODE_ENV === 'production';
 const SESSION_TTL = 8 * 60 * 60 * 1000;
+const LEVELS = ['Scintilla','Ascensus','Fabrica','Culmen','Apex','Fastigium','Vertex','Corona'];
 const sessions = new Map();
 
 function ensureDataFile(name) {
@@ -86,7 +87,7 @@ async function handleApi(req,res,pathname){
   if(pathname.startsWith('/api/admin/')&&!requireAdmin(req,res))return;
   if(req.method==='GET'&&pathname==='/api/admin/state')return json(res,200,{sponsors:getSponsors(),config:getConfig()});
   if(req.method==='POST'&&pathname==='/api/admin/sponsors'){
-    const b=await bodyJson(req);const {id,name,parentId='',level='Scintilla',notes=''}=b;if(!id||!name)return json(res,400,{error:'ID and name are required.'});let sponsors=getSponsors();if(sponsors.some(s=>String(s.id)===String(id)))return json(res,409,{error:'That sponsor ID already exists.'});
+    const b=await bodyJson(req);const {id,name,parentId='',level='Scintilla',notes=''}=b;if(!id||!name)return json(res,400,{error:'ID and name are required.'});if(!LEVELS.includes(level))return json(res,400,{error:'Invalid level.'});let sponsors=getSponsors();if(sponsors.some(s=>String(s.id)===String(id)))return json(res,409,{error:'That sponsor ID already exists.'});
     const maxOrder=sponsors.reduce((m,s)=>Math.max(m,s.sortOrder||0),0);sponsors.push({id:String(id).trim(),name:String(name).trim(),parentId:String(parentId||'').trim(),directs:0,level,status:sponsors.some(s=>s.status==='active')?'waiting':'active',sortOrder:maxOrder+10,clicks:0,notes:String(notes||'').trim()});sponsors=normalizeStatuses(sponsors);saveSponsors(sponsors);return json(res,201,{sponsors});
   }
   if(req.method==='PATCH'&&pathname==='/api/admin/config'){
@@ -94,7 +95,7 @@ async function handleApi(req,res,pathname){
   }
   const m=pathname.match(/^\/api\/admin\/sponsors\/([^/]+)(?:\/(increment|activate|qualify|reset|move))?$/);
   if(m){const id=decodeURIComponent(m[1]),action=m[2]||null;let sponsors=getSponsors(),idx=sponsors.findIndex(s=>s.id===id);if(idx<0)return json(res,404,{error:'Sponsor not found.'});
-    if(req.method==='PATCH'&&!action){const b=await bodyJson(req);for(const k of ['name','parentId','directs','level','notes'])if(Object.prototype.hasOwnProperty.call(b,k))sponsors[idx][k]=b[k];sponsors[idx].directs=Math.max(0,Math.min(2,Number(sponsors[idx].directs)||0));saveSponsors(sponsors);return json(res,200,{sponsors});}
+    if(req.method==='PATCH'&&!action){const b=await bodyJson(req);if(Object.prototype.hasOwnProperty.call(b,'level')&&!LEVELS.includes(b.level))return json(res,400,{error:'Invalid level.'});for(const k of ['name','parentId','directs','level','notes'])if(Object.prototype.hasOwnProperty.call(b,k))sponsors[idx][k]=b[k];sponsors[idx].directs=Math.max(0,Math.min(2,Number(sponsors[idx].directs)||0));saveSponsors(sponsors);return json(res,200,{sponsors});}
     if(req.method==='DELETE'&&!action){const wasActive=sponsors[idx].status==='active';sponsors.splice(idx,1);if(wasActive)sponsors=normalizeStatuses(sponsors);saveSponsors(sponsors);return json(res,200,{sponsors});}
     if(req.method==='POST'&&action==='increment'){sponsors[idx].directs=Math.min(2,(Number(sponsors[idx].directs)||0)+1);saveSponsors(sponsors);return json(res,200,{sponsors});}
     if(req.method==='POST'&&action==='activate'){if(sponsors[idx].status==='qualified')return json(res,400,{error:'Qualified sponsors cannot be activated until reset.'});sponsors=normalizeStatuses(sponsors,id);saveSponsors(sponsors);return json(res,200,{sponsors});}