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3 Commits

Author SHA1 Message Date
Paul Trowbridge
a6e6efd36e Switch /data endpoint to Arrow IPC stream with pg cursor batching 
Server streams rows from a pg cursor in 10k-row batches, building Arrow
record batches incrementally and piping them as chunked HTTP response —
Node.js heap stays bounded regardless of dataset size.

Client fetches as arrayBuffer() and loads directly into Perspective worker
(native Arrow path, no JSON deserialization). X-Row-Count header drives
a non-blocking banner for datasets >= 500k rows. validCols now derived
from col_meta rather than from row keys.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-27 22:57:47 -04:00
Paul Trowbridge
dc090fe394 Scaffold React/Vite/Tailwind UI with 3-step Setup → Baseline → Forecast flow 
- ui/: React + Vite + Tailwind app (Setup, Baseline, Forecast views, collapsible sidebar, status bar, canvas timeline)
- server.js: serve built UI from public/app/
- package.json: add build script (cd ui && npm run build)
- routes/sources.js: default new col_meta role to 'dimension' instead of 'ignore'
- .gitignore: exclude public/app/ build output
- pf_spec.md: update tech stack, nav, frontend section, and project status to reflect current implementation

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-25 16:28:45 -04:00
Paul Trowbridge
08dc415bfd Initial commit — pivot forecast application 
Node.js/Express + PostgreSQL forecasting app with AG Grid Enterprise pivot UI.
Supports baseline, scale, recode, clone operations on configurable source tables.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-01 07:59:05 -04:00