tiennm99 b890dfb3b7 fix(canvas): code-review fixes + sync user-facing docs to DO storage ...

Fixes from code review of canvas-on-do migration (commit c3f7c02):

- worker.js /api/ws: rewrite request URL to '/ws' so the DO pathname
  switch dispatches correctly. The original c.req.raw kept '/api/ws'
  which the DO never matched → 404 on every WS upgrade.
- migrate-from-upstash.js pickSampleOffsets: use TOTAL_PIXELS - 1 for the
  last byte instead of CANVAS_WIDTH * CANVAS_WIDTH (only correct when
  the canvas is square; constants explicitly invite non-square).
- chunk-storage.js writePixels: clarify atomicity comment — the loop is
  atomic *because it has no awaits*, not because of any implicit DO
  transaction. Added guidance for future maintainers.
- cooldown-store.js tryAcquire: GC sweep wrapped in try/catch so a
  transient failure can't drop the user's allowed: true response.

Docs:
- README.md: drop Upstash from tech stack, redraw architecture,
  document new project layout (durable-objects/lib, admin/), add
  CHUNK_BYTES to configuration table.
- docs/system-architecture.md: full rewrite for DO-storage data flow,
  document SQLite schema, race-safe rate-limit pattern, free-tier table.
- docs/deployment-guide.md: drop Upstash setup, add optional one-shot
  migration runbook, update free-tier table to actual May 2026 limits.

Tests: 112 pass, 6 skipped (pending Phase 4 rewrite via
@cloudflare/vitest-pool-workers). Bundle dry-run clean.

Local wrangler dev smoke test was attempted but the sandboxed env
hangs HTTP requests at the workerd layer (TCP connects, no response).
Routing fix verified by code inspection; user must verify in their
own dev or production.

2026-05-10 00:37:27 +07:00

..

canvas-resize-procedure.md

docs(canvas): correct CF DO limits in resize doc and plan

2026-05-10 00:07:39 +07:00

code-standards.md

refactor(rate-limit): 1 req/sec cooldown, batch up to 2048 (#3)

2026-04-18 10:19:00 +07:00

deployment-guide.md

fix(canvas): code-review fixes + sync user-facing docs to DO storage

2026-05-10 00:37:27 +07:00

references.md

update references and add credits to README

2026-04-16 15:24:50 +07:00

system-architecture.md

fix(canvas): code-review fixes + sync user-facing docs to DO storage

2026-05-10 00:37:27 +07:00