Enable SwiftLint rule: empty_string

No violations found — the codebase already complies.

---

Generated with the help of Claude Code, https://code.claude.com

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mokagio

.swiftlint.yml

@@ -2,6 +2,7 @@ swiftlint_version: 0.57.1
 only_rules: # Rules to run
   - custom_rules
   - empty_count
+  - empty_string
 
 # If true, SwiftLint will treat all warnings as errors.
 strict: true