Add Apple module content statistics

[lastcow]

What changed

• added per-module counts for materials, presentations, assignments, quizzes, and discussions to the existing Modules API response
• aggregated all counts in the module-list query instead of issuing additional client requests
• kept student counts permission-aware so draft content is not disclosed
• added four aligned Apple module metrics: teaching materials, assignments, quizzes, and discussions
• added English and Simplified Chinese labels plus model, integration, accessibility, and UI-test coverage

Why

The module roadmap showed sequence and schedule but not the amount of learning content or assessment work inside each module. The new metrics make module workload and content density scannable without opening each module.

Validation

• iPhone 17 Pro simulator (iOS 26.5): 15/15 tests passed
• iPad Pro 13-inch M5 simulator (iOS 26.5): 15/15 tests passed
• API tests: 415 passed, 92 integration tests skipped without a local database
• TypeScript typecheck, ESLint, and workspace production build passed
• focused visual UI tests passed on iPhone light mode and iPad split-view dark mode
• Apple Release simulator build succeeded
• Release artifact contains no UI-test fixture account or sample course markers
• English and Simplified Chinese localization plists lint successfully
• git diff --check passes

No database migration is required; the change only adds aggregate fields to an existing API query.

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Add course scoping to module content counts

When a course item has a moduleId that points at a module in another course (the current PATCH handlers for assignments/presentations/quizzes/discussions accept moduleId directly without rechecking the module's course), these new aggregates key only on module_id, so /courses/:courseId/modules will count that foreign item for this module; for students this can also disclose that a published item exists in a course they cannot access. Please also constrain each count subquery by the item's course_id so stale or cross-course links cannot inflate or leak counts.

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