Update Storybook to 10.6 to fix dependency thrashing

[Nateowami]

1. The version of esbuild pnpm installs for Storybook appears to be thrashing back and forth with each audit fix (See the table below, which shows the trashing. Disclaimer: AI generated and I only spot-checked it)
2. This PR updates Storybook, which shouuld fix this thrashing, because it specifies newer version of esbuild

I haven't fully researched the exact reasons for the version thrashing, or fully verified that this will fix it, but since the solution is updating Storybook and we'd need to do that anyway at some point, I'm not inclined to try to look into it too deeply.

I think this is really a bug in pnpm.

Date	Change	pnpm in workflow	Storybook's esbuild	Diff
2026-07-09	#3966 SF-3821 Switch to pnpm (lockfile created)	–	0.27.7	lockfile L19018 ¹
2026-07-20	#3989 bot	11.10	0.27.7 → 0.27.2 (audit fix)	diff
07-22 – 09-14	11 bot PRs, #3994 … #4092	11.10	0.27.2 (unchanged)	–
2026-09-16	#4106 Update to pnpm 12.3.4, update vulnerable dependencies (manual)	11.10 → 12.3.4	0.27.2 → 0.27.7	lockfile L18384 ¹
2026-09-21	#4125 bot	12.3.4	0.27.7 → 0.27.2 (audit fix)	lockfile L18402 ¹
2026-09-22	#4128 bot	12.3.4	0.27.2 → 0.27.7 (update)	diff
2026-09-23	#4133 bot	12.3.4	0.27.7 → 0.27.2 (audit fix)	diff
2026-09-24	#4138 bot	12.3.4	0.27.2 → 0.27.7 (update)	diff
2026-09-24	#4141 bot (open)	12.3.4	0.27.7 → 0.27.2 (audit fix)	diff

---

This change is 

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.01%. Comparing base (f8702a8) to head (058639f).
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #4147   +/-   ##
=======================================
  Coverage   81.01%   81.01%           
=======================================
  Files         664      664           
  Lines       42336    42336           
  Branches     6996     6996           
=======================================
  Hits        34299    34299           
  Misses       6874     6874           
  Partials     1163     1163           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

[pmachapman]

I think this is really a bug in pnpm.

Agreed - it only started happening after the most recent update.

since the solution is updating Storybook and we'd need to do that anyway at some point, I'm not inclined to try to look into it too deeply.

Thank you - I had tried to update Storybook before 10.6 weas released and kept encountering GHA failures due to some weird exception thrown deliberately to prevent Storybook from running on WSL.

@pmachapman reviewed 9 files and all commit messages, and made 1 comment.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on Nateowami).