feat(odoo): add activeblue_ai Odoo 18 module with OWL2 frontend

Models:
- ab.ai.bot: service URL, webhook secret, privacy mode, ping/dispatch
- ab.ai.directive: full directive lifecycle log with status tracking
- ab.ai.log: activity log with level/agent/record linkage
- ab.ai.agent.registry: agent list synced from agent service

Controllers:
- webhook.py: /ai/webhook/callback handles directive_completed, escalation, sweep_findings
- health_proxy.py: /ai/health proxies agent service detailed health
- approval.py: /ai/chat dispatch, /ai/approval/pending, /ai/approval/respond

Security:
- group_ai_user (chat) + group_ai_manager (configure, approve, logs)
- ir.model.access.csv for all 4 models

Views: list/form for bot, directives, logs, registry; main menu with AI brain icon

OWL2 frontend:
- systray_button.js: brain icon in top bar, status dot, pending approval badge
- ai_panel.js: slide-in chat panel, approval workflow, 30s poll for pending items
- CSS: slide-in animation, message bubbles, loading dots, approval section

Data: 4 cron jobs (ping, registry sync, directive/log cleanup)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

addons/activeblue_ai/models/ab_ai_log.py

@@ -0,0 +1,46 @@
+from odoo import models, fields, api
+import logging
+
+_logger = logging.getLogger(__name__)
+
+
+class AbAiLog(models.Model):
+    _name = 'ab.ai.log'
+    _description = 'AI Activity Log'
+    _order = 'create_date desc'
+    _rec_name = 'summary'
+
+    summary = fields.Char(string='Summary', required=True, readonly=True)
+    level = fields.Selection(
+        [('info', 'Info'), ('warning', 'Warning'), ('error', 'Error'), ('debug', 'Debug')],
+        string='Level',
+        default='info',
+        required=True,
+        index=True,
+    )
+    agent_name = fields.Char(string='Agent', readonly=True, index=True)
+    directive_id = fields.Char(string='Directive ID', readonly=True, index=True)
+    user_id = fields.Many2one('res.users', string='User', readonly=True)
+    details = fields.Text(string='Details', readonly=True)
+    model_name = fields.Char(string='Model', readonly=True)
+    record_id = fields.Integer(string='Record ID', readonly=True)
+
+    @api.model
+    def log(self, summary, level='info', agent=None, directive_id=None,
+            user_id=None, details=None, model=None, record_id=None):
+        return self.create({
+            'summary': summary[:255] if summary else '',
+            'level': level,
+            'agent_name': agent or '',
+            'directive_id': directive_id or '',
+            'user_id': user_id,
+            'details': details or '',
+            'model_name': model or '',
+            'record_id': record_id or 0,
+        })
+
+    @api.model
+    def cron_cleanup(self):
+        cutoff = fields.Datetime.subtract(fields.Datetime.now(), days=30)
+        old = self.search([('create_date', '<', cutoff), ('level', 'in', ['info', 'debug'])])
+        old.unlink()