touchCacheEntry() now returns a new object via spread instead of mutating
the entry in-place. CacheManager.replaceCards() likewise creates a new entry
object instead of mutating existing fields. Update tests to assert the new
immutable semantics (returned value differs from input by reference).
https://claude.ai/code/session_016QvEfqw6YZ3RjwBHrJ4w8S
Move ParallelReaderView to src/view.ts (341 lines),
CardEditModal to src/modal.ts (56 lines),
ParallelReaderSettingTab to src/settings-tab.ts (370 lines).
Add PluginHost interface in types.ts to break circular deps.
main.ts reduced from 1613 to 588 lines.
Change-Id: I90902e914f162ff92b9a7f7c190b4d397a2c8c12
Move prompt and anchor matching into dedicated modules, add Chinese/English UI translation support, and cover cache fingerprint and translation behavior with tests.
Change-Id: Ieadc2197cba31cf750b83e2893909127da8ecca5
