#1961 keyed the sidebar's React children by source position, but everything
downstream still identified a tool by `tool.name`. With a `tools/list` that
repeats a name, both copies highlighted at once, the click guard made the
other copy a no-op, and `tools.find((t) => t.name === …)` always resolved to
the first — so a later copy rendered but could never be opened.
Thread the row key through selection instead:
- `utils/toolUtils.ts` now owns `toolRowKey` (moved out of ToolControls) and
adds `findToolByRowKey`, which compares computed keys rather than parsing
one so the two can't drift.
- `ToolControls`: `selectedName` → `selectedKey`; the highlight and the click
guard compare keys, and `onSelectTool` emits the row key.
- `ToolsScreen`: `ToolsUiState.selectedToolName` → `selectedToolKey`, with
both lookups going through `findToolByRowKey`. Renamed through
`screenUiState.ts` and `App.tsx`'s `onToolsUiChange`.
`onCallTool` still sends `selectedTool.name` — the duplicated name is the
genuine wire identity; only the UI identity needed to be unique.
Also prefixes the excluded (SEP-2243) rows' keys: they render into the same
`Stack` as the list rows but index within their own list, so an excluded tool
sharing a name and index with a listed one collided in the key space.
Closes#2001
Signed-off-by: cliffhall <cliff@futurescale.com>
ab40fb621a