feat(app): ExpansionGenerator — 청크당 별칭 생성 (fail-soft)

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

crates/kebab-app/Cargo.toml

@@ -71,6 +71,10 @@ base64               = { workspace = true }
 rusqlite             = { workspace = true }
 
 [dev-dependencies]
+# doc-side expansion (Phase 2) Task 4: ExpansionGenerator unit tests build
+# MockLanguageModel (gated behind kebab-llm's `mock` feature, default OFF in
+# [dependencies]). Enabling it here turns it on for the test build only.
+kebab-llm            = { path = "../kebab-llm", features = ["mock"] }
 rusqlite             = { workspace = true }
 filetime             = "0.2"
 tempfile             = { workspace = true }