# T16 Izveštaj: SSE auto-refresh dashboarda

**Agent:** coder
**Model:** Opus
**Datum:** 2026-02-20

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## Šta je urađeno

Dashboard se automatski ažurira kad se stanje taskova promeni putem SSE.

### Novi fajlovi

| Fajl | Opis |
|------|------|
| `internal/server/events.go` | EventBroker, polling (2s), hashTaskState, SSE handler |

### Izmenjeni fajlovi

| Fajl | Izmena |
|------|--------|
| `internal/server/server.go` | events field, GET /events ruta, startPolling u Run() |
| `internal/server/render.go` | renderBoardFragment() za SSE updates |
| `internal/server/server_test.go` | 4 nova testa |
| `web/templates/layout.html` | initSSE(), isDragging flag, onStart handler |
| `web/templates/partials/column.html` | Uklonjen hx-trigger="every 5s" (zamenjeno SSE-om) |

### Kako radi

1. Server poluje TASKS/ svake 2s
2. Računa SHA-256 hash svih task ID:status parova
3. Ako se hash promenio → broadcast SSE event svim klijentima
4. Browser EventSource prima event → zameni board HTML
5. Tokom drag & drop — SSE update se ignoruje (isDragging flag)

### Endpoint

| Ruta | Opis |
|------|------|
| `GET /events` | SSE stream — event `taskUpdate` sa board HTML |

### Novi testovi — 4 PASS

```
TestSSE_EventsEndpoint       PASS  — proverava Content-Type text/event-stream
TestHashTaskState            PASS  — hash se menja kad se status menja, stabilan za isti set
TestSSE_BroadcastOnChange    PASS  — premesti fajl → broadcast event
TestSSE_NoBroadcastWithoutChange PASS — bez promene → bez eventa
```

### Ukupno projekat: 129 testova, svi prolaze

- `go vet ./...` — čist
- `go build ./...` — prolazi