[2shiraz]

On the Graphs tab only Live drew lines. 30 min, 1 h, 6 h, 24 h, 7 d and 30 d showed empty charts, with only the legend numbers filled in.

Cause

The chart is reused when you switch ranges, but two settings were fixed when it was first built in Live mode:

• the x-axis window, set to 15 minutes;
• how gaps between points are drawn.

Every historical range was therefore drawn into a 15-minute window, so almost nothing was visible.

Fix

• Chart.svelte:
  • The chart rebuilds when switching between Live and a historical range.
  • The x range follows the selected window.
  • On historical ranges, lines join across empty buckets.
  • Isolated points (sparse data, such as a fresh install viewing 7 d) are drawn as dots.
• metrics.Query: the 1 s history lives in memory, so after a restart (for example an update) the 30 min and 1 h views only showed the minutes since the restart. They now fill the older part of the range from the persisted 1-minute rollups. Live stays pure 1 s data.

Verification

• New regression test TestQueryFillsRingGapFromRollups. It fails without the fix and passes with it.
• golangci-lint reports 0 issues, go test ./... passes, and npm run check is clean.
• Browser check against a live stack:
  • open Graphs (Live), then switch to 30 min, 1 h and 7 d: each draws its full window with data;
  • switch back to Live: it works as before;
  • after a restart, 30 min and 1 h still show the history from before it.
• Playwright e2e: 2/2 pass.

🤖 Generated with Claude Code

https://claude.ai/code/session_0159fEExV6P6AdgP7HbsJNBc

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