Improve Tachyon UX

This is a meta issue to group all the items to improve the UX of the tachyon profiler.

Tasks

CLI

• Standardize timing arguments — Currently mixing µs and seconds for related timing args, which is confusing
• Duration should default to "until done" - The fact that we sample only for 10 seconds by default is confusing to users and a bad experience

Workflow

• Auto-open browser with results — Reduce manual steps in the workflow; add --no-browser flag to disable

Flamegraph

• Hide runner/bootstrap frames by default — Top rows showing interpreter startup aren't useful for most profiling tasks
• The Gil/gc/exception indicators could be progress bars — this probably will show the information more clearly and take less space
• Show module names instead of full file paths — /home/user/project/pkg/mod.py → pkg.mod for readability
• Show "self" time for functions — Display time spent in function body excluding callees, not just total inclusive time
• Move hotspots to top of sidebar — This is the most important info; currently buried below logo and stats
• Fix inverted flamegraph width — Currently shows narrow chart when leaves sum to small percentage, wasting screen space

Pstats

• Fix docs: -o output format — Docs imply text output but it's actually binary pstats format
• Standardize --pstats behavior — Output format differs significantly with/without -o flag, which is unexpected

Thanks @dmoisset 🖤

Linked PRs

• gh-142934
• gh-142936
• gh-142987
• gh-143178
• gh-143180
• gh-143337
• gh-143388
• gh-144885
• gh-145329
• gh-145428
• gh-146040
• gh-147706
• gh-148118
• gh-148568

這是 Tachyon profiler UX 的中繼 issue，列出的每項任務都已標記為完成。該 issue 引用了已連結的 PR gh-142934、gh-142936、gh-142987、gh-143178、gh-143180、gh-143337、gh-143388、gh-144885、gh-145329、gh-145428、gh-146040、gh-147706、gh-148118 和 gh-148568；未識別出任何剩餘的變更或驗證目標。