packages/shared was never a real pnpm workspace package (no package.json); it was referenced only through the @shared TypeScript path alias. Relocate it under src/ via git mv (143 files, detected as pure renames).
Repoint the @shared alias and include globs to src/shared across electron.vite.config.ts, tsconfig.{json,node,web}.json and vitest.config.ts; update scripts/check-custom-exts.ts, scripts/update-languages.ts, the eslint.config.mjs generated-file globs, the data-classify generator output targets, .github/CODEOWNERS path rules, and CLAUDE.md/docs/source-comment references.
The @shared alias name is unchanged, so all 1403 @shared/* import sites resolve without modification. Verified with typecheck:node, typecheck:web and the full test suite (700 files, 9739 tests passing).
