[Meerav29]

Summary

Moves the Apple Health upload into the new app (/app/upload), per docs/superpowers/specs/2026-10-04-upload-flow-design.md.

• Streaming parser in a Web Worker (web/src/lib/health/): parseExport turns UTF-8 chunks into per-day running totals (memory grows with days, not records); fileToChunks reads export.xml or streams the health XML out of export.zip with fflate (ZIP64 and data-descriptor ZIPs covered by fixtures). A parity test extracts the classic parseHealthXML from index.html and asserts identical daily/summary.
• Upload page: guide + drop zone -> progress (Cancel) -> preview (cards, sparklines, replace warning) -> explicit Save -> saved. Specific error messages per failure; a failed save keeps the parsed result so Retry doesn't re-parse.
• Saving: from the browser under RLS, replacing daily/summary and keeping the user's existing life events; never reads the demo row. Only aggregated daily numbers are stored; raw records never leave the browser.
• Entry points: nav "Upload" link; dashboard empty state and sample-data banner link to /upload.
• API: a Supabase outage now returns 503 instead of "No health data found" (so a user with data is never told they have none).
• Intentional differences from the classic parser: ZIP accepted directly; no 600 MB cap; quote-aware tag tokenizer; new users start with no life events; Safari-safe sleep timestamp parsing.

Not verified yet: a real export in a real browser

Please run the acceptance checklist on the Vercel preview before merging (plan Task 12):

1. Drop your real export.zip (and the unzipped export.xml) at /app/upload: the tab stays responsive, progress moves, and the days/averages match the classic app.
2. Save, then open the dashboard: your data shows with no "sample data" banner. Upload again: the preview warns it replaces your data and keeps your events.
3. A .txt file, an empty file, and a ZIP with no export.xml each give a specific message; Cancel mid-parse returns to the drop zone.
4. The classic upload at / still works. If a large export fails, note the browser and tab memory.

Known follow-ups (deferred, not in this PR)

• A valid export with >~20 trailing whitespace characters after </HealthData> is rejected as corrupt (Apple writes a single newline).
• Out-of-memory while inflating a huge ZIP is still reported as "damaged or incomplete" (the ZIP reader wraps the error before the new worker-failed mapping).
• An export whose only in-window records are sleep-in-bed / walking HR / respiratory rate saves an empty dashboard (same as classic).
• Replace warning is omitted while the health query is pending/errored; reset/start during an in-flight save can be overwritten (unreachable via the UI).
• Classic-app users keep the author's default semester events (life-event editing is out of scope).
• Two commits lack a blank line before Co-Authored-By (squash-merge fixes it).

Test plan

• python -m pytest -q (56 passed)
• npm --prefix web test (225 passed), lint, typecheck, build (separate parse.worker-*.js chunk emitted under /app/assets)
• Vercel preview checklist above

🤖 Generated with Claude Code

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Project	Deployment	Actions	Updated
somada	Ready	Preview	Oct 11, 2026 11:24pm UTC