Each time a student completes a pass through a spelling_practice course
item — initial round, missed-words drill, or a retry — a row is now
written to submission_history so the parent sees individual attempts
instead of a single day-grouped entry.
- app.js: send sessionAttempted/sessionCorrect with /complete calls
- server.js: write to submission_history on each spelling_practice
completion; add GET /api/spelling-sessions endpoint
- admin.html/js: new "Practice Sessions" table shows one row per pass
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
nmemmertandClaude Sonnet 4.6
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