Add job run logs, OpenRouter model picker, and discipline grouping.

- Job logs: each job's stdout/stderr is teed into outputs/<id>/job.log
  (survives restarts) and served at GET /jobs/{id}/log as text/plain, so
  full run logs can be shared for debugging and refinement.
- Model picker: GET /models proxies OpenRouter's public model list with
  per-1M-token pricing (1h cache, 502 on failure); the UI shows a model
  dropdown with costs when OpenRouter compute is selected, and the pick
  overrides vision+text models for that job (Classic and Agent modes).
- Conflicts in the report view are grouped by discipline pair
  (collapsible sections, severity-ordered within groups) instead of one
  flat severity-only list.

frontend/index.html

@@ -120,6 +120,10 @@
       <input type="radio" name="compute" value="openrouter" checked> OpenRouter &mdash; all stages (fastest, paid)</label>
     <label style="display:block;font-weight:400;margin-top:6px">
       <input type="radio" name="compute" value="local"> Hybrid &mdash; text stages on local LLM (cheaper, slower)</label>
+    <div id="modelPick" style="margin-top:10px">
+      <label for="model" style="font-weight:400">Model <span class="opt" id="modelNote">loading...</span></label>
+      <select id="model" style="width:100%;margin-top:6px;padding:10px;border-radius:8px;border:1px solid var(--line);background:#0c0e13;color:var(--text)"></select>
+    </div>
   </div>
   <button class="btn full" id="run" disabled>Run conflict check</button>
   <div class="status" id="status"></div>
@@ -163,6 +167,10 @@ runBtn.addEventListener('click',async e=>{
   });
   const compute=(document.querySelector('input[name="compute"]:checked')||{}).value;
   fd.append('text_local', compute==='local' ? 'true' : 'false');
+  if(compute==='openrouter'){
+    const modelSel=document.getElementById('model');
+    if(modelSel.value) fd.append('model', modelSel.value);
+  }
   const pipelineMode=(document.querySelector('input[name="pipeline_mode"]:checked')||{}).value||'classic';
   fd.append('pipeline_mode',pipelineMode);
   try{
@@ -222,6 +230,33 @@ function syncPipelineOptions(){
 document.querySelectorAll('input[name="pipeline_mode"]').forEach(el=>el.addEventListener('change',syncPipelineOptions));
 syncPipelineOptions();
 
+// --- model picker (OpenRouter compute only) ---
+let modelList=null;
+async function loadModels(){
+  const note=document.getElementById('modelNote'), sel=document.getElementById('model');
+  try{
+    const res=await fetch('/models');
+    if(!res.ok) throw new Error('list unavailable');
+    const data=await res.json();
+    modelList=data.models||[];
+    sel.innerHTML=modelList.map(m=>
+      '<option value="'+escAttr(m.id)+'"'+(m.id===data.default?' selected':'')+'>'+
+      esc(m.name||m.id)+' &mdash; $'+esc(m.prompt_usd_per_mtok)+' / $'+esc(m.completion_usd_per_mtok)+
+      ' per 1M tok</option>').join('');
+    note.textContent='('+modelList.length+' available)';
+  }catch(e){
+    sel.innerHTML='';
+    note.textContent='using configured default (list unavailable)';
+  }
+}
+function syncCompute(){
+  const openrouter=(document.querySelector('input[name="compute"]:checked')||{}).value==='openrouter';
+  document.getElementById('modelPick').style.display=openrouter?'block':'none';
+  if(openrouter&&!modelList) loadModels();
+}
+document.querySelectorAll('input[name="compute"]').forEach(el=>el.addEventListener('change',syncCompute));
+syncCompute();
+
 // --- sheet viewer ---
 function pageFor(num){ return sheetPage[num] || sheetPage[(num||'').toUpperCase()] || null; }
 function sheetSpan(num){
@@ -248,6 +283,43 @@ function closeSheet(){ document.getElementById('viewer').classList.remove('open'
 document.getElementById('viewer').addEventListener('click',e=>{ if(e.target.id==='viewer') closeSheet(); });
 document.addEventListener('keydown',e=>{ if(e.key==='Escape') closeSheet(); });
 
+// --- conflicts grouped by discipline pair ---
+const SEV_RANK={critical:0,high:1,medium:2,low:3};
+function sevRank(c){ const r=SEV_RANK[(c.severity||'').toLowerCase()]; return r==null?4:r; }
+function groupConflicts(conflicts){
+  // Group key: disciplines sorted alphabetically, joined ' vs ' (order-independent
+  // pair). Missing disciplines -> 'General'. Groups ordered by their most severe
+  // conflict, then name; items within a group ordered critical->high->medium->low.
+  const groups={};
+  for(const c of conflicts||[]){
+    const ds=(c.disciplines||[]).map(d=>String(d)).filter(Boolean).sort();
+    const key=ds.length?ds.join(' vs '):'General';
+    (groups[key]=groups[key]||[]).push(c);
+  }
+  const names=Object.keys(groups).sort((a,b)=>{
+    const ra=Math.min.apply(null,groups[a].map(sevRank)),
+          rb=Math.min.apply(null,groups[b].map(sevRank));
+    return (ra-rb)||a.localeCompare(b);
+  });
+  return names.map(name=>({name:name,
+    items:groups[name].slice().sort((x,y)=>sevRank(x)-sevRank(y))}));
+}
+function conflictCard(c){
+  let html='<div class="conflict '+esc(c.severity)+'">'+
+    '<div class="row"><span class="cat">'+esc(c.category)+'</span>'+
+    '<span class="pill '+esc(c.severity)+'">'+esc(c.severity)+'</span></div>'+
+    '<div class="loc">'+esc(c.location)+'</div>'+
+    '<div class="meta">'+esc((c.disciplines||[]).join(' vs '))+
+      ' &middot; sheets '+sheetList(c.sheets)+'</div>'+
+    '<div class="desc">'+esc(c.description)+'</div>';
+  if(c.evidence&&c.evidence.length){
+    html+='<div class="ev">'+c.evidence.map(e=>
+      '<div><span class="d">'+esc(e.discipline)+'</span> ('+sheetSpan(e.sheet)+'): "'+esc(e.source_text)+'"</div>').join('')+'</div>';
+  }
+  if(c.recommended_resolution){ html+='<div class="reso">Resolution: '+esc(c.recommended_resolution)+'</div>'; }
+  return html+'</div>';
+}
+
 function render(rep){
   const s=rep.summary;
   if(!currentJobId) currentJobId=new URLSearchParams(location.search).get('job');
@@ -279,20 +351,10 @@ function render(rep){
   } else if(!rep.conflicts.length){
     html+='<div class="empty">No cross-discipline conflicts detected.</div>';
   }
-  for(const c of rep.conflicts){
-    html+='<div class="conflict '+esc(c.severity)+'">'+
-      '<div class="row"><span class="cat">'+esc(c.category)+'</span>'+
-      '<span class="pill '+esc(c.severity)+'">'+esc(c.severity)+'</span></div>'+
-      '<div class="loc">'+esc(c.location)+'</div>'+
-      '<div class="meta">'+esc((c.disciplines||[]).join(' vs '))+
-        ' &middot; sheets '+sheetList(c.sheets)+'</div>'+
-      '<div class="desc">'+esc(c.description)+'</div>';
-    if(c.evidence&&c.evidence.length){
-      html+='<div class="ev">'+c.evidence.map(e=>
-        '<div><span class="d">'+esc(e.discipline)+'</span> ('+sheetSpan(e.sheet)+'): "'+esc(e.source_text)+'"</div>').join('')+'</div>';
-    }
-    if(c.recommended_resolution){ html+='<div class="reso">Resolution: '+esc(c.recommended_resolution)+'</div>'; }
-    html+='</div>';
+  for(const g of groupConflicts(rep.conflicts)){
+    html+='<details open style="margin-top:16px"><summary><b>'+esc(g.name)+' ('+g.items.length+')</b></summary>';
+    for(const c of g.items){ html+=conflictCard(c); }
+    html+='</details>';
   }
 
   const issues=rep.validated_issues||[];