MPDX-9702 Add Export Goals as PDF (Print All) button to Active Goals tab

[wjames111]

Description

• Enables the previously-disabled Print All button on the MPD Goal Admin "Active Goals" tab: it exports every goal in the selected cohort as a single printable PDF (for NSO hard copies) and downloads it in the browser.
• The button is disabled — with an explanatory tooltip — until the cohort's training costs have been entered, the gate the ticket describes as shared with Run & Send.
• The async generate → download-URL flow mirrors the existing contacts CSV-export pattern (exportRest.tsx): spinner while generating, temporary-anchor download, error snackbar on failure.
• The printCohortGoals mutation (MPDX-9691) does not exist yet (no mpdx_api PR, not on staging), and MpdGoalAdmin is still the mock prototype tool, so generateCohortGoalsPdf currently builds a valid placeholder PDF client-side behind the exact seam the mutation will slot into (marked TODO(MPDX-9691)). CI codegen against the real schema also forbids referencing the mutation today.
• Added a second mock cohort ("Spring NSO 2027", training costs not entered) so the disabled gate is reachable in the UI and tests.
• Decisions on the ticket's open questions: Print All exports all goals in the cohort (the MPDX-9690 PDF service renders incomplete goals with blank lines); no selected-ids "More Actions" variant added.
• Related: MPDX-9702. Depends on MPDX-9691 (mutation, for real wiring) and MPDX-9690 (PDF service, CruGlobal/mpdx_api#3507). Note: the Run & Send buttons are not yet gated on training costs — flagged for follow-up rather than expanding this ticket's scope.

Testing

• Go to HR Tools → MPD Goal Calculator - Admin Table (Active Goals tab)
• With the default "Fall NSO 2026" training selected, click Print All
• Check that a MPD Goals - Fall NSO 2026.pdf file downloads and opens, listing the cohort's goals (placeholder content until MPDX-9691 is wired)
• Switch the Training dropdown to "Spring NSO 2027"
• Check that Print All is disabled and hovering it shows "Enter training costs for this cohort to print its goals."
• Open Training Cost → View/Edit, fill in all costs, and save
• Check that Print All becomes enabled

Checklist:

• I have given my PR a title with the format "MPDX-(JIRA#) (summary sentence max 80 chars)"
• I have applied the appropriate labels (Add the label "Preview" to automatically create a preview environment)
• I have run the Claude Code /quality:agent-review command locally and fixed any relevant suggestions
• I have requested a review from another person on the project
• I have tested my changes in preview or in staging
• I have cleaned up my commit history

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Bundle sizes [mpdx-react]

Compared against 8b6c94e

No significant changes found