fix: project picker clipped, full-screen width bug, New Project shortcut

Five fixes to the Sprint 15 Move to Project picker:

1. CRITICAL: Picker was invisible (overflow:hidden clipping)
   Appended to document.body + positioned with fixed/getBoundingClientRect
   instead of inside .session-item (overflow:hidden). Flips above button
   when near bottom of viewport.

2. CRITICAL: Picker stretched full screen width
   position:fixed removed the containing block width constraint. Added
   max-width:220px; width:max-content to .project-picker.

3. UX: No way to create a project from the picker
   Added '+ New project': creates project and moves session in one click.

4. UX: Feature was undiscoverable
   Folder button shows persistently (blue, 60% opacity) when session
   has a project.

5. Minor: Event listener leak
   removeEventListener was missing from picker item onclick handlers.

Tests: 237 passed (7 pre-existing failures from unrelated logger bug).

static/sessions.js

@@ -287,7 +287,8 @@ function renderSessionListFromCache(){
     trash.onclick=async(e)=>{e.stopPropagation();e.preventDefault();await deleteSession(s.session_id);};
     // Project move button (folder icon)
     const move=document.createElement('button');
-    move.className='session-action-btn'+(s.project_id?' has-project':'');move.innerHTML='📂';move.title='Move to project';
+    move.className='session-action-btn'+(s.project_id?' has-project':'');
+    move.innerHTML='📂';move.title='Move to project';
     move.onclick=async(e)=>{e.stopPropagation();e.preventDefault();_showProjectPicker(s,move);};
     // Project dot indicator
     if(s.project_id){
@@ -360,15 +361,13 @@ function _showProjectPicker(session, anchorEl){
   document.querySelectorAll('.project-picker').forEach(p=>p.remove());
   const picker=document.createElement('div');
   picker.className='project-picker';
-  // Close on outside click
-  const close=(e)=>{if(!picker.contains(e.target)&&e.target!==anchorEl){picker.remove();document.removeEventListener('click',close);}};
   // "No project" option
   const none=document.createElement('div');
   none.className='project-picker-item'+(!session.project_id?' active':'');
   none.textContent='No project';
   none.onclick=async()=>{
-    document.removeEventListener('click',close);
     picker.remove();
+    document.removeEventListener('click',close);
     await api('/api/session/move',{method:'POST',body:JSON.stringify({session_id:session.session_id,project_id:null})});
     session.project_id=null;
     renderSessionListFromCache();
@@ -389,8 +388,8 @@ function _showProjectPicker(session, anchorEl){
     name.textContent=p.name;
     item.appendChild(name);
     item.onclick=async()=>{
-      document.removeEventListener('click',close);
       picker.remove();
+      document.removeEventListener('click',close);
       await api('/api/session/move',{method:'POST',body:JSON.stringify({session_id:session.session_id,project_id:p.project_id})});
       session.project_id=p.project_id;
       renderSessionListFromCache();
@@ -398,19 +397,21 @@ function _showProjectPicker(session, anchorEl){
     };
     picker.appendChild(item);
   }
-  // "+ New project" item
+  // "+ New project" shortcut at the bottom
   const createItem=document.createElement('div');
   createItem.className='project-picker-item project-picker-create';
   createItem.textContent='+ New project';
   createItem.onclick=async()=>{
     picker.remove();
     document.removeEventListener('click',close);
+    // Prompt for name inline
     const name=prompt('Project name:');
     if(!name||!name.trim()) return;
     const color=PROJECT_COLORS[_allProjects.length%PROJECT_COLORS.length];
     const res=await api('/api/projects/create',{method:'POST',body:JSON.stringify({name:name.trim(),color})});
     if(res.project){
       _allProjects.push(res.project);
+      // Now move session into it
       await api('/api/session/move',{method:'POST',body:JSON.stringify({session_id:session.session_id,project_id:res.project.project_id})});
       session.project_id=res.project.project_id;
       await renderSessionList();
@@ -418,11 +419,13 @@ function _showProjectPicker(session, anchorEl){
     }
   };
   picker.appendChild(createItem);
-  // Position picker on document.body to avoid overflow:hidden clipping
+  // Append to body and position using getBoundingClientRect so it isn't clipped
+  // by overflow:hidden on .session-item ancestors
   document.body.appendChild(picker);
   const rect=anchorEl.getBoundingClientRect();
   picker.style.position='fixed';
   picker.style.zIndex='999';
+  // Prefer opening below; flip above if too close to bottom of viewport
   const spaceBelow=window.innerHeight-rect.bottom;
   if(spaceBelow<160&&rect.top>160){
     picker.style.bottom=(window.innerHeight-rect.top+4)+'px';
@@ -431,10 +434,13 @@ function _showProjectPicker(session, anchorEl){
     picker.style.top=(rect.bottom+4)+'px';
     picker.style.bottom='auto';
   }
-  const pickerW=160;
+  // Align right edge of picker with right edge of button; keep within viewport
+  const pickerW=Math.min(220,Math.max(160,picker.scrollWidth||160));
   let left=rect.right-pickerW;
   if(left<8) left=8;
   picker.style.left=left+'px';
+  // Close on outside click
+  const close=(e)=>{if(!picker.contains(e.target)&&e.target!==anchorEl){picker.remove();document.removeEventListener('click',close);}};
   setTimeout(()=>document.addEventListener('click',close),0);
 }
 

static/style.css

@@ -540,7 +540,7 @@ body.resizing{user-select:none;cursor:col-resize;}
 .project-create-btn{font-size:10px;padding:3px 6px;border-radius:12px;cursor:pointer;border:1px dashed var(--border2);background:none;color:var(--muted);opacity:.6;transition:all .15s;}
 .project-create-btn:hover{opacity:1;border-color:var(--blue);color:var(--blue);}
 .project-create-input{font-size:10px;padding:3px 8px;border-radius:12px;border:1px solid rgba(124,185,255,.6);background:rgba(20,32,60,.9);color:var(--text);outline:none;width:100px;font-family:inherit;box-shadow:0 0 0 2px rgba(124,185,255,.15);}
-.project-picker{position:absolute;right:0;top:100%;background:var(--sidebar);border:1px solid var(--border2);border-radius:8px;padding:4px;z-index:30;min-width:140px;max-width:220px;width:max-content;box-shadow:0 4px 16px rgba(0,0,0,.3);}
+.project-picker{position:absolute;right:0;top:100%;background:var(--sidebar);border:1px solid var(--border2);border-radius:8px;padding:4px;z-index:30;min-width:160px;max-width:220px;width:max-content;box-shadow:0 4px 16px rgba(0,0,0,.3);}
 .project-picker-item{padding:5px 10px;font-size:11px;border-radius:6px;cursor:pointer;color:var(--muted);transition:all .1s;display:flex;align-items:center;gap:6px;}
 .project-picker-item:hover{background:rgba(255,255,255,.08);color:var(--text);}
 .project-picker-item.active{color:var(--blue);}