Enhance profiler flame chart and unify design

[butschster]

Summary

• Flame chart: search — inline search input in toolbar with autocomplete dropdown, finds functions by name across the tree
• Flame chart: sandwich view — click any block to see all callers and callees of that function aggregated in a sidebar
• Flame chart: bug fix — properly destroy old FlameChart instances on metric switch (was causing visual glitches from stale event listeners)
• Flame chart: theming — dark-mode-aware colors for canvas, timeline, graph peaks, knobs, and text; removed duplicate time header; increased block padding to prevent text overlap
• Design unification — all three profiler tabs (Call graph, Flamechart, Top functions) now share consistent styling:
  • Background: bg-gray-50 dark:bg-gray-800 (matches site default)
  • Frosted glass toolbars (backdrop-blur-sm, semi-transparent)
  • Overflow-hidden cascade from profiler page through tab panels
  • Top functions: sticky frosted header, zebra rows with contrast, hover states

Test plan

• Open profiler page, switch between all three tabs — no scroll leaks
• Flamechart: switch metrics (Wall time → CPU → Memory) — no visual glitches on hover
• Flamechart: type in search, verify autocomplete shows functions with call counts
• Flamechart: click a block — sandwich sidebar opens with callers/callees
• Flamechart: click caller/callee in sidebar — navigates to that function's sandwich
• Verify dark mode colors on timeline (light text, blue peaks, themed knobs)
• Call graph: verify frosted glass toolbar style
• Top functions: verify sticky header, zebra rows, active column highlight
• Test fullscreen mode in call graph

🤖 Generated with Claude Code