Completes Phase B. The full alternative-onboarding flow is now end-to-end:
drop a T212 pie CSV → parser → InstrumentMap resolver → PortfolioSnapshot
+ Position rows, all without ever asking the user for broker credentials.
- persist_pie() in app/services/csv_import.py: takes a ParsedPie, resolves
each Slice via InstrumentMap, writes Portfolio + Snapshot + Position
rows. Unmapped slices are still persisted using their CSV values and
surfaced in the response for the UI to warn about.
- POST /api/portfolios/upload: multipart endpoint accepting CSV file +
optional portfolio_name + currency. 2 MiB cap. Returns import summary.
- /upload page with drag-drop dropzone, file input fallback, and inline
result panel showing invested/value/result + unmapped-slice warnings.
- New "Import" link in the header nav.
Verified end-to-end against the real T212 export: all 13 positions land
with correct T212 tickers (incl. FPp_EQ for the Paris TotalEnergies
listing the heuristic resolver picks), zero unmapped slices, totals
reconcile to the penny.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Giorgio Gilestro
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