merge: upgrade to upstream v0.50.95 + keep custom additions

Upstream v0.50.95 features merged (Russian localization, slash commands,
mic toggle fix, gateway sync fix, KaTeX/Prism.js, etc.)

Custom additions preserved:
- Tier-2 agent switching commands in commands.js
- MC panel in index.html + MC CSS
- _resolve_cli_toolsets() in config.py
- Custom routes.py, server.py, boot.js, i18n.js, messages.js, workspace.js

Files with conflict resolution (took upstream, custom code in other files):
- CHANGELOG.md, config.py, commands.js, index.html, panels.js, style.css, ui.js

server.py

@@ -86,6 +86,25 @@ class Handler(BaseHTTPRequestHandler):
 
 
 def main() -> None:
+    # Load ~/.hermes/.env into os.environ so API keys are available
+    # (mirrors what run_agent.py does via load_hermes_dotenv).
+    from pathlib import Path as _P
+    import os as _os
+    _env_file = _P(_os.environ.get('HERMES_HOME', str(_P.home() / '.hermes'))) / '.env'
+    if _env_file.exists():
+        try:
+            with open(_env_file) as _f:
+                for _line in _f:
+                    _line = _line.strip()
+                    if _line and not _line.startswith('#') and '=' in _line:
+                        _k, _v = _line.split('=', 1)
+                        _k = _k.strip()
+                        _v = _v.strip().strip('"').strip("'")
+                        if _k and _k not in _os.environ:
+                            _os.environ[_k] = _v
+        except Exception:
+            pass
+
     from api.config import print_startup_config, verify_hermes_imports, _HERMES_FOUND
 
     print_startup_config()