Align cache-overview.md and cache-usage.md with the template-key and
subscribe* APIs (sharedCasual was dropped in 3fbc52e05). Extract the
"adding keys" content into a new cache-schema-guide.md aligned with
preference and boot-config schema guides. Lift non-obvious invariants
(isEqual short-circuit, TTL-with-hooks warning, Persist has no delete,
Main-wins convergence, template placeholder rules) into a first-class
Design Invariants section in the overview.
Fix two code-contradicted claims:
- useCache does not accept a TTL options argument (hook signature is
(key, initValue?)).
- Persist is renderer-authoritative; Main only relays IPC and does
not store (CacheService.ts:477-479 is "Reserved, not implemented").
Update peripheral references in the same pass so cross-references stay
coherent: v2-renderer skill, CLAUDE.md, architecture-overview.md,
api-design-guidelines.md (Cache vs DataApi matcher contrast), and the
package READMEs.
Net change: +249 / -579.
- Updated links in CONTRIBUTING.md and README.md to point to the correct Chinese documentation paths.
- Removed outdated files including the English and Chinese versions of the branching strategy, contributing guide, and test plan documents.
- Cleaned up references to non-existent documentation in the project structure to streamline the contributor experience.
