fix(addon): require LLM backend reachability for bot online state

action_ping was hitting /health, which returns 200 as long as the
FastAPI app responds — even when Ollama is down, dispatch fails. So the
bot showed online while every DM errored.

Switch to /health/detailed and gate 'online' on db, master_agent and
the active LLM backend (ollama for local privacy mode, claude
otherwise) all reporting 'ok'. Anything else flips the bot to error
or offline, which propagates through _sync_bot_user_presence to a grey
dot in Discuss.

addons/activeblue_ai/models/ab_ai_bot.py

@@ -57,17 +57,34 @@ class AbAiBot(models.Model):
 
     def action_ping(self):
         self.ensure_one()
-        url = self._get_service_url() + '/health'
+        url = self._get_service_url() + '/health/detailed'
         try:
             resp = requests.get(url, timeout=5, headers=self._build_headers())
-            if resp.status_code == 200:
+            if resp.status_code != 200:
-                self.write({'status': 'online', 'last_ping': fields.Datetime.now()})
-                return {'type': 'ir.actions.client', 'tag': 'display_notification',
-                        'params': {'message': _('AI service is online'), 'type': 'success'}}
-            else:
                 self.write({'status': 'error'})
                 return {'type': 'ir.actions.client', 'tag': 'display_notification',
                         'params': {'message': _('AI service returned %s') % resp.status_code, 'type': 'warning'}}
+            data = resp.json() if resp.content else {}
+            # Bot is only "online" when every backend the LLM router needs is ok.
+            # Local privacy mode requires Ollama; cloud requires Claude. We treat
+            # any backend whose status is not 'ok' as a hard failure for the
+            # privacy mode in use, plus DB and master agent are always required.
+            db_ok = data.get('db') == 'ok'
+            master_ok = data.get('master_agent') == 'ok'
+            mode = data.get('privacy_mode') or self.privacy_mode
+            ollama_ok = data.get('ollama') == 'ok'
+            llm_ok = ollama_ok if mode == 'local' else True
+            if db_ok and master_ok and llm_ok:
+                self.write({'status': 'online', 'last_ping': fields.Datetime.now()})
+                return {'type': 'ir.actions.client', 'tag': 'display_notification',
+                        'params': {'message': _('AI service is online'), 'type': 'success'}}
+            self.write({'status': 'error', 'last_ping': fields.Datetime.now()})
+            reason = ', '.join(
+                f'{k}={data.get(k)}' for k in ('db', 'master_agent', 'ollama')
+                if data.get(k) and data.get(k) != 'ok'
+            ) or 'degraded'
+            return {'type': 'ir.actions.client', 'tag': 'display_notification',
+                    'params': {'message': _('AI service degraded: %s') % reason, 'type': 'warning'}}
         except Exception as exc:
             self.write({'status': 'offline'})
             return {'type': 'ir.actions.client', 'tag': 'display_notification',