Empty state
===========

Spec: descriptive guidance, not a checkable rule.
It carries no forbidden and instead pair, and no `jig check` detector applies to it directly.
Section: Components and layout

Four distinct cases. Collapsing them into one generic "No data" is the failure (`E-30`).

| Case | Message | Action |
| --- | --- | --- |
| **Never had data** | What this collection is for | The creation action, prominent |
| **Filtered to nothing** | Which filters are active | Clear filters |
| **Error loading** | That it failed, and whether it is transient | Retry |
| **No permission** | That access is restricted, not that it is empty | Who to ask |

**Rules**
- Never show "no results" when the cause was an error. The user will search for something that was there all along.
- The filtered-empty state repeats the active query so the user can see the typo.
- Empty is not a full-page illustration in `product` or `operator`. It is a sentence and a button inside the container that would have held the data.
- Empty state occupies roughly the space the filled state would, or the layout jumps when data arrives.

**Mode variance:** illustration is permitted in `product` empty states only, and never in `operator` (`01-modes.md`).