feat: multi-profile support -- create, switch, delete profiles from web UI (Issue #28)

Add full profile management to the web UI, matching the hermes-agent CLI
profile system. Profiles are isolated HERMES_HOME instances with their own
config, skills, memory, cron, and API keys.

Backend: new api/profiles.py wrapping hermes_cli.profiles, dynamic config
reloading, 5 new API endpoints, profile-aware path resolution, HERMES_HOME
env save/restore in streaming, module-level cache patching for skills_tool
and cron/jobs.

Frontend: profile chip in topbar with dropdown, Profiles sidebar panel with
CRUD UI, boot-time profile fetch, cascade refresh on switch.

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

static/boot.js

@@ -309,6 +309,11 @@ document.querySelectorAll('.suggestion').forEach(btn=>{
 (async()=>{
   // Load send key preference
   try{const s=await api('/api/settings');window._sendKey=s.send_key||'enter';}catch(e){window._sendKey='enter';}
+  // Fetch active profile
+  try{const p=await api('/api/profile/active');S.activeProfile=p.name||'default';}catch(e){S.activeProfile='default';}
+  // Update profile chip label immediately
+  const profileLabel=$('profileChipLabel');
+  if(profileLabel) profileLabel.textContent=S.activeProfile||'default';
   // Fetch available models from server and populate dropdown dynamically
   await populateModelDropdown();
   // Restore last-used model preference