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>

api/profiles.py

@@ -0,0 +1,246 @@
+"""
+Hermes Web UI -- Profile state management.
+Wraps hermes_cli.profiles to provide profile switching for the web UI.
+
+The web UI maintains a process-level "active profile" that determines which
+HERMES_HOME directory is used for config, skills, memory, cron, and API keys.
+Profile switches update os.environ['HERMES_HOME'] and monkey-patch module-level
+cached paths in hermes-agent modules (skills_tool, cron/jobs) that snapshot
+HERMES_HOME at import time.
+"""
+import json
+import os
+import threading
+from pathlib import Path
+
+# ── Module state ────────────────────────────────────────────────────────────
+_active_profile = 'default'
+_profile_lock = threading.Lock()
+_DEFAULT_HERMES_HOME = Path.home() / '.hermes'
+
+
+def _read_active_profile_file() -> str:
+    """Read the sticky active profile from ~/.hermes/active_profile."""
+    ap_file = _DEFAULT_HERMES_HOME / 'active_profile'
+    if ap_file.exists():
+        try:
+            name = ap_file.read_text().strip()
+            if name:
+                return name
+        except Exception:
+            pass
+    return 'default'
+
+
+# ── Public API ──────────────────────────────────────────────────────────────
+
+def get_active_profile_name() -> str:
+    """Return the currently active profile name."""
+    return _active_profile
+
+
+def get_active_hermes_home() -> Path:
+    """Return the HERMES_HOME path for the currently active profile."""
+    if _active_profile == 'default':
+        return _DEFAULT_HERMES_HOME
+    profile_dir = _DEFAULT_HERMES_HOME / 'profiles' / _active_profile
+    if profile_dir.is_dir():
+        return profile_dir
+    return _DEFAULT_HERMES_HOME
+
+
+def _set_hermes_home(home: Path):
+    """Set HERMES_HOME env var and monkey-patch cached module-level paths."""
+    os.environ['HERMES_HOME'] = str(home)
+
+    # Patch skills_tool module-level cache (snapshots HERMES_HOME at import)
+    try:
+        import tools.skills_tool as _sk
+        _sk.HERMES_HOME = home
+        _sk.SKILLS_DIR = home / 'skills'
+    except (ImportError, AttributeError):
+        pass
+
+    # Patch cron/jobs module-level cache
+    try:
+        import cron.jobs as _cj
+        _cj.HERMES_DIR = home
+        _cj.CRON_DIR = home / 'cron'
+        _cj.JOBS_FILE = _cj.CRON_DIR / 'jobs.json'
+        _cj.OUTPUT_DIR = _cj.CRON_DIR / 'output'
+    except (ImportError, AttributeError):
+        pass
+
+
+def _reload_dotenv(home: Path):
+    """Load .env from the profile dir into os.environ (additive)."""
+    env_path = home / '.env'
+    if not env_path.exists():
+        return
+    try:
+        for line in env_path.read_text().splitlines():
+            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 v:
+                    os.environ[k] = v
+    except Exception:
+        pass
+
+
+def init_profile_state():
+    """Initialize profile state at server startup.
+
+    Reads ~/.hermes/active_profile, sets HERMES_HOME env var, patches
+    module-level cached paths.  Called once from config.py after imports.
+    """
+    global _active_profile
+    _active_profile = _read_active_profile_file()
+    home = get_active_hermes_home()
+    _set_hermes_home(home)
+    _reload_dotenv(home)
+
+
+def switch_profile(name: str) -> dict:
+    """Switch the active profile.
+
+    Validates the profile exists, updates process state, patches module caches,
+    reloads .env, and reloads config.yaml.
+
+    Returns: {'profiles': [...], 'active': name}
+    Raises ValueError if profile doesn't exist or agent is busy.
+    """
+    global _active_profile
+
+    # Import here to avoid circular import at module load
+    from api.config import STREAMS, STREAMS_LOCK, reload_config
+
+    # Block if agent is running
+    with STREAMS_LOCK:
+        if len(STREAMS) > 0:
+            raise RuntimeError(
+                'Cannot switch profiles while an agent is running. '
+                'Cancel or wait for it to finish.'
+            )
+
+    # Resolve profile directory
+    if name == 'default':
+        home = _DEFAULT_HERMES_HOME
+    else:
+        home = _DEFAULT_HERMES_HOME / 'profiles' / name
+        if not home.is_dir():
+            raise ValueError(f"Profile '{name}' does not exist.")
+
+    with _profile_lock:
+        _active_profile = name
+        _set_hermes_home(home)
+        _reload_dotenv(home)
+
+    # Write sticky default for CLI consistency
+    try:
+        ap_file = _DEFAULT_HERMES_HOME / 'active_profile'
+        ap_file.write_text(name if name != 'default' else '')
+    except Exception:
+        pass
+
+    # Reload config.yaml from the new profile
+    reload_config()
+
+    return {'profiles': list_profiles_api(), 'active': name}
+
+
+def list_profiles_api() -> list:
+    """List all profiles with metadata, serialized for JSON response."""
+    try:
+        from hermes_cli.profiles import list_profiles
+        infos = list_profiles()
+    except ImportError:
+        # hermes_cli not available -- return just the default
+        return [_default_profile_dict()]
+
+    active = _active_profile
+    result = []
+    for p in infos:
+        result.append({
+            'name': p.name,
+            'path': str(p.path),
+            'is_default': p.is_default,
+            'is_active': p.name == active,
+            'gateway_running': p.gateway_running,
+            'model': p.model,
+            'provider': p.provider,
+            'has_env': p.has_env,
+            'skill_count': p.skill_count,
+        })
+    return result
+
+
+def _default_profile_dict() -> dict:
+    """Fallback profile dict when hermes_cli is not importable."""
+    return {
+        'name': 'default',
+        'path': str(_DEFAULT_HERMES_HOME),
+        'is_default': True,
+        'is_active': True,
+        'gateway_running': False,
+        'model': None,
+        'provider': None,
+        'has_env': (_DEFAULT_HERMES_HOME / '.env').exists(),
+        'skill_count': 0,
+    }
+
+
+def create_profile_api(name: str, clone_from: str = None,
+                       clone_config: bool = False) -> dict:
+    """Create a new profile. Returns the new profile info dict."""
+    try:
+        from hermes_cli.profiles import create_profile, validate_profile_name
+    except ImportError:
+        raise RuntimeError('Profile management requires hermes-agent to be installed.')
+
+    validate_profile_name(name)
+    create_profile(
+        name,
+        clone_from=clone_from,
+        clone_config=clone_config,
+        clone_all=False,
+        no_alias=True,
+    )
+
+    # Find and return the newly created profile info
+    for p in list_profiles_api():
+        if p['name'] == name:
+            return p
+    return {'name': name, 'path': str(_DEFAULT_HERMES_HOME / 'profiles' / name)}
+
+
+def delete_profile_api(name: str) -> dict:
+    """Delete a profile. Switches to default first if it's the active one."""
+    if name == 'default':
+        raise ValueError("Cannot delete the default profile.")
+
+    # If deleting the active profile, switch to default first
+    if _active_profile == name:
+        try:
+            switch_profile('default')
+        except RuntimeError:
+            raise RuntimeError(
+                f"Cannot delete active profile '{name}' while an agent is running. "
+                "Cancel or wait for it to finish."
+            )
+
+    try:
+        from hermes_cli.profiles import delete_profile
+        delete_profile(name, yes=True)
+    except ImportError:
+        # Manual fallback: just remove the directory
+        import shutil
+        profile_dir = _DEFAULT_HERMES_HOME / 'profiles' / name
+        if profile_dir.is_dir():
+            shutil.rmtree(str(profile_dir))
+        else:
+            raise ValueError(f"Profile '{name}' does not exist.")
+
+    return {'ok': True, 'name': name}