The EQ's editor floated over the editor as a window since #367. The user wants it as a tab for now. Whether any tab can float and dock again is weighed apart from this. - A double-click on the node asks for the tab through `EditorState.openEq`, as `openValues` does for a Variables tab. - The tab is a document `eq:<asset>:<node>`, one per EQ node. A second double-click brings the open one up. - Its name is the asset's, with `EQ 2`, `EQ 3` when the asset has more than one. The icon is the sound FX's. - The tab closes with its node, its asset, or a new project, through the same `syncDocuments` as every document. - `EqWindow` becomes `EqEditor`, a `VStack` with a `TabHeader`. The curve takes the room of the tab, 320 x 160 at least. - The window's title bar, dragging and Close button are gone. - Delete in the EQ's tab removes the picked band. It never falls through to the selection, which is still the EQ's node. - The hint below the curve is shorter, it was cut off at 1280 px. Tests: - e2e 34 (melektaus-atx): ALL PASSED, 96 checks, 2 rewritten. The tab opens on a double-click and goes with its node. - Gate (melektaus-atx): CHECK EXIT 0, 274 files, 4231 tests. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>