[Client] Replace application picker with case selector

[danielsjoo]

Summary

• Replace the bundled JSON picker with the published server-driven case tree.
• Support responsive SVG/photo answers, registered React interactions, outcome instructions, PDF upload, confirmed notes, service records, and direct application handoff.
• Add a neutral manual opt-out path for custom Markdown instructions plus optional completed-PDF upload.
• Add semantic organization-document assignment under My Organization: admins/directors map authored labels such as “Director ID photocopy” to an uploaded organization PDF; workers can see the mapping but cannot change it.
• Keep instruction sheets white and print-oriented.

Review walkthrough

1. An author defines a semantic document label; an organization admin opens My Organization and selects the actual reusable PDF from a dropdown.
2. Outcome automation references the stable label, not a raw organization-specific document UUID.
3. The case flow resolves client/date/response directives and can propose a note, upload a completed PDF, or continue into an application.
4. Workers can opt out of the tree and record custom instructions when the definitive flow does not fit.

Verification

• npm run build
• npx eslint src/components/AccountSettings/MyOrganization.tsx
• Full-stack browser walkthrough against server-next: admin assignment, persisted selection, desktop/mobile layouts, and console check

Screenshots

Organization document label assignment

SVG and photo answer choices

Neutral manual fallback and print-style sheet

Notes

• The existing React Alert defaultProps warning remains unrelated to this change.
• Server: https://github.com/keepid/keepid_server_next/pull/109
• Dev portal: https://github.com/keepid/keepid_dev_portal/pull/26