Remove ImportDialog and all manual credential management. The browser
handles 401 challenges natively for same-origin fetch requests — it
shows its own credential prompt, retries, and caches the result for
the session. No JS-level auth code is needed.
- api.js: remove authHeader() and all credentials parameters
- store.js: remove credentials field
- ImportDialog.js: deleted
- AppShell.js: remove showImport/openImport/onMounted dialog machinery;
pass importOnLoad through to PaneCP
- PaneCP.js: inline doImport() (was in ImportDialog); auto-triggers on
mount when importOnLoad is true; shows inline import error on failure
- StatusPoller.js: remove credentials arg from fetchStatus()
- style.css: remove .se-import-dialog and .se-overlay blocks
The bottom handle bar is now dynamic. Fixed CP + FO handles, then one
handle per kind of sub-object the focused node has. "Kind" is the SLOT
part of the AST's SLOT.SUBTYPE namespace: sub-objects sharing a SLOT
(e.g. `line.stem_note` + `line.motif`, or `articles.<subtypeA>` +
`articles.<subtypeB>`) collapse into one pane; different SLOTs split.
Score-level kinds emit, in this order: TU (tuning), ST (stage cone +
voices), IN (instruments — linked ones listed read-only), AR (articles),
BA (bars). info metadata is folded into the FO pane (was previously
listed as a sub-object).
Handles are 2-letter labels for now, intended as alt-text for icons in
a later release.
- `subobject-kinds.js` new: `getKindGroups(node)` returns ordered
`[{ kind, items }]`; `KIND_LABEL` maps kind -> 2-letter label.
- `PaneSubObjects.js` now parameterized by `kind` prop; renders one group.
- `AppShell.js` builds the handle bar from `getKindGroups(focusedNode)`;
drops back to FO when the active sub-pane disappears after a focus change.
- `ObjectShort.js` accepts a `readOnly` flag (used for linked instruments).
