feat(agent): integrate agents into all BOC modules

- Add AgentFAB floating button to CRM, Sales, Finance, HR, Legal, Marketing, Support, Automation
- Update AgentChat to use /api/v1/agents/chat with auth token
- Add error handling and fallback to mock responses
- Update Anthropic model to claude-sonnet-4-6
- Show agent context in chat footer (title + competencies)
- Build fresh web-v2 dist

backend/handlers/agent.go

@@ -120,7 +120,7 @@ func (o *AgentOrchestrator) callAnthropic(systemPrompt string, meddelanden []Age
 	}
 
 	payload := map[string]interface{}{
-		"model":      "claude-3-sonnet-20240229",
+		"model":      "claude-sonnet-4-6",
 		"max_tokens": 1024,
 		"system":     systemPrompt,
 		"messages":   messages,