WEBDEV-9430: Migrate ia-book-actions into elements

[jbuckner]

Ported from @internetarchive/ia-book-actions 1.4.5 and converted to TypeScript. Stacked on #161 (modal-manager), which it uses.

🤖 Generated with Claude Code

https://claude.ai/code/session_015Bjrz5J3MXcF5RDBZFvZy1

[github-actions]

PR Preview Action v1.8.1
🚀 View preview at https://internetarchive.github.io/elements/pr/pr-175/
Built to branch ghpages at 2026-10-09 19:13 UTC. Preview will be ready when the GitHub Pages deployment is complete.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 69.95074% with 305 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.01%. Comparing base (76f4fc9) to head (1d4a437).

Files with missing lines	Patch %	Lines
...s/core/services/actions-handler/actions-handler.ts	36.49%	82 Missing and 5 partials ⚠️
src/elements/ia-book-actions/ia-book-actions.ts	84.59%	28 Missing and 23 partials ⚠️
...-book-actions/core/services/get-lending-actions.ts	66.91%	18 Missing and 26 partials ⚠️
...ctions/ia-book-actions-collapsible-action-group.ts	63.63%	26 Missing and 6 partials ⚠️
...elements/ia-book-actions/core/config/url-helper.ts	20.83%	18 Missing and 1 partial ⚠️
...ts/ia-book-actions/core/services/loan-analytics.ts	65.11%	12 Missing and 3 partials ⚠️
...ts/ia-book-actions/core/services/actions-config.ts	66.66%	9 Missing and 5 partials ⚠️
...ments/ia-book-actions/core/services/doc-cookies.ts	27.77%	9 Missing and 4 partials ⚠️
...ia-book-actions/core/services/loan-renew-helper.ts	71.11%	7 Missing and 6 partials ⚠️
...ervices/actions-handler/actions-handler-service.ts	80.55%	4 Missing and 3 partials ⚠️
... and 4 more

Additional details and impacted files

@@                          Coverage Diff                          @@
##           WEBDEV-9429-migrate-modal-manager     #175      +/-   ##
=====================================================================
- Coverage                              90.70%   86.01%   -4.70%     
=====================================================================
  Files                                    102      130      +28     
  Lines                                   3474     4489    +1015     
  Branches                                 832     1057     +225     
=====================================================================
+ Hits                                    3151     3861     +710     
- Misses                                   134      351     +217     
- Partials                                 189      277      +88     

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