fix: address CodeRabbit review — Nivo description + marker guard

- Correct Nivo `Responsive*` behavior: `ResizeObserver` does re-fire
  when container becomes visible, not "never re-fires on show"
- Add `altimate_change` marker around `installedVersion` banner line

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: anandgupta42

.opencode/skills/data-viz/references/component-guide.md

@@ -422,7 +422,7 @@ activateTab('overview'); // init the default visible tab on page load
 Library-specific notes:
 - **Chart.js**: canvas reads as `0×0` inside `display:none` — bars/lines never appear
 - **Recharts `ResponsiveContainer`**: reads `clientWidth = 0` — chart collapses to nothing
-- **Nivo `Responsive*`**: uses `ResizeObserver` — fires once at `0×0`, never re-fires on show
+- **Nivo `Responsive*`**: uses `ResizeObserver` via `useMeasure`/`useDimensions` in `@nivo/core` — initially measures `0×0` when hidden and skips rendering; re-measures and re-renders correctly when container becomes visible, but the initial blank frame can cause a flash
 - **React conditional rendering**: prefer `visibility:hidden` + `position:absolute` over toggling `display:none` if you want charts to stay mounted and pre-rendered
 
 ---

packages/opencode/src/cli/welcome.ts

@@ -67,7 +67,9 @@ export function showWelcomeBannerIfNeeded(): void {
     const reset = "\x1b[0m"
     const bold = "\x1b[1m"
 
+    // altimate_change start — use installedVersion (from marker) instead of currentVersion for accurate banner
     const v = `altimate-code v${installedVersion} installed`
+    // altimate_change end
     const lines = [
       "",
       "  Get started:",