[snowyukitty]

Fixes #1323.

The static Oscillator cache can reuse a native PeriodicWave created at a different sample rate. In Chromium, a 440 Hz rotated sine renders at approximately 480 Hz after warming the cache at 44.1 kHz and rendering at 48 kHz; reversing the rates gives approximately 404 Hz. FatOscillator also reaches this cache through its phase-shifted oscillators.

Include the context's sampleRate in both cache lookups and in each entry. Same-rate reuse and the existing 100-entry limit are preserved.

Eight browser regression tests compare rendered rotated/custom sine waves with an analytic reference in both rate orders, plus same-rate controls that verify cache reuse. Against the original production source, the complete Oscillator test file has 54 passing tests and four failing mixed-rate cases; with the fix, all 58 pass.

Validation on Linux, Node 22.14.0 and Chromium 149:

• npm test: 3,108 passed, 0 failed, 43 skipped (upstream: 3,100 passed, 43 skipped).
• npm run lint, npm run spellcheck, npm run build, and Prettier checks for both changed files: passed. The build retains the upstream webpack bundle-size warnings.
• Additional offline rendering checks confirmed creation-order independence for the default sawtooth FatOscillator and same-rate reuse after closing an online context.

Firefox validation was blocked by a browser automation timeout before a page could be created. Safari was not tested.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.92%. Comparing base (97cfc4d) to head (a16d53f).
⚠️ Report is 5 commits behind head on dev.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1528   +/-   ##
=======================================
  Coverage   98.92%   98.92%           
=======================================
  Files         209      209           
  Lines       23584    23608   +24     
  Branches     1030     1032    +2     
=======================================
+ Hits        23330    23354   +24     
  Misses        251      251           
  Partials        3        3           

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[tambien]

thanks so much for the fix!