05f68ced44
Final step of the virtualization plan. Turns the virtualized render path on in production behind a row-count threshold, and adds regression tests covering every gate. - `VIRTUALIZATION_ROW_THRESHOLD = 60`. Short lists stay on the direct render path (no wrapper, no position: absolute, no measurement churn). Above the threshold the virtualizer takes over. Threshold is sized so conversations under ~one session of activity don't pay the virtualization cost; it activates once scrolling through a longer history. - `shouldVirtualize` now requires `renderRows.length >= threshold` in addition to the existing opt-in and scroll-ref checks. - `MessagesPanel` opts into virtualization for every layout it wires (inline / sidebar / bottom-sheet). The internal threshold then decides when to actually enable it, so callers don't need per-layout heuristics. - Tests: adds a new `ActivityTimeline virtualization threshold` block covering (a) below-threshold list stays on the direct path, (b) no viewport → direct path regardless of count, (c) above threshold + viewport with `virtualizationEnabled` flips to the virtualized render path (simulated by clicking "show all" past pagination). With this in, #70 → #74 combine to deliver: - correct IntersectionObserver roots in scroll containers - atomic render rows with stable keys - windowed rendering with DOM-measured scrollMargin and measureElement - auto-on when the cost of direct rendering actually shows up |
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| .. | ||
| cli | ||
| common | ||
| extensions | ||
| runtime | ||
| sidebar | ||
| team | ||
| fileLink.test.ts | ||
| renderOutput.test.ts | ||
| reviewDiffSafety.test.ts | ||