refactor: consume @citation-evidence/work for review mode (CWORK-WP-0001 cutover)

Cut review mode over to the extracted citation-work package instead of a local
src/work/ implementation.

- Add @citation-evidence/work as a link: dependency
- Repoint the @work alias (tsconfig + vite) to ../citation-work/src/work and
  allow vite fs access to the sibling
- Remove the local src/work/ implementation (now owned by citation-work)

Typecheck, lint, and the full test suite (51 tests) pass.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

vite.config.ts

@@ -35,7 +35,7 @@ export default defineConfig({
       "@engine": resolve(__dirname, "../citation-engine/src/engine"),
       "@source": resolve(__dirname, "src/source"),
       "@binder": resolve(__dirname, "../evidence-binder/src"),
-      "@work":   resolve(__dirname, "src/work"),
+      "@work":   resolve(__dirname, "../citation-work/src/work"),
       "@app":    resolve(__dirname, "src/app"),
     },
   },
@@ -46,6 +46,7 @@ export default defineConfig({
         resolve(__dirname),
         resolve(__dirname, "../citation-engine"),
         resolve(__dirname, "../evidence-binder"),
+        resolve(__dirname, "../citation-work"),
       ],
     },
   },