[outofcoffee]

Engine logs in the serve view and the dashboard's node detail view now wrap long lines by default, with a w key to turn wrapping off — closing #267.

Summary

• Log lines wider than the pane wrap onto continuation rows instead of being hard-cut, in both the serve view and the dashboard detail view. Wrapping is on by default; w toggles it and the header shows wrap: on/off beside the log's follow state.
• w wrap joins the footer key help in both views.
• New dashWrapLines/dashLogRows pair in dashboard_render.go beside dashClip: the pane expands its window's lines to rows and takes the last avail rows.
• Metrics sections, tiles and the grid keep clipping — dashClip's cut is what keeps bar lines the shape of the frame.
• OpenSpec change wrap-engine-logs with deltas to local-serving and fleet-client.

Closes #267

Implementation details

Retention and scrolling stay line-based (logBudget, detailLogCapacity, logBehind) — only the pane counts rows at draw time — so a wrapped line scrolls in and out whole, the way tail behaves on a terminal. The wrapper breaks at exact display columns (hard, not on words: log lines are data and often carry no spaces), keeping wide clusters whole on the next row, and avoids ansi.CutWc with a non-zero left, which misbehaves on wide runes in the pinned charmbracelet/x/ansi; it cuts heads with TruncateWc and tails with TruncateLeftWc.