Include Grant total_grantee_reimbursement_amount in the invitation letter template

[marcoacierno]

I want to be able to say in the invitation letter how much PyCon Italia is reimbursing post conference if the requester has a grant. Use the grant "total_grantee_reimbursement_amount" field for this

[marcoacierno]

@claude work on this

[claude]

Claude finished @marcoacierno's task in 3m 10s —— View job • claude/issue-4550-20260202-1220 • Create PR ➔

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Include grant total_grantee_reimbursement_amount in invitation letter template

• Gather context: find invitation letter and grant code
• Add total_grantee_reimbursement_amount property to InvitationLetterRequest model
• Add total_grantee_reimbursement_amount to template context in _render_content
• Add tests for the new template variable
• Lint and tests (skipped locally due to tool permissions — CI will validate)
• Commit and push

Summary

Added total_grantee_reimbursement_amount as a template variable available in invitation letter dynamic documents. This allows you to use {{total_grantee_reimbursement_amount}} in the invitation letter template to display the post-conference reimbursement amount for grantees (excluding ticket costs).

Changes:

• backend/visa/models.py: Added total_grantee_reimbursement_amount property to InvitationLetterRequest — returns None if no grant exists, otherwise delegates to Grant.total_grantee_reimbursement_amount
• backend/visa/tasks.py: Added the new variable to the template context in _render_content
• backend/visa/tests/test_models.py: Added assertions for the new property (both with and without a grant)
• backend/visa/tests/test_tasks.py: Added end-to-end test verifying the template variable renders correctly in a dynamic document

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