fix: resolve build errors and add comprehensive symlink tests

- Fixed E0425 error in src/skills/mod.rs by moving println! inside #[cfg(unix)] block where 'dest' variable is in scope
- Added missing 'identity' field to Config struct initializations in src/onboard/wizard.rs
- Fixed import paths for AIEOS identity functions in src/channels/mod.rs
- Added comprehensive symlink edge case tests in src/skills/symlink_tests.rs
- All 840 tests passing, 0 clippy warnings

Resolves issue #28: skills symlink functionality now works correctly on Unix platforms with proper error handling on non-Unix platforms

Cargo.toml

@@ -60,6 +60,12 @@ tokio-tungstenite = { version = "0.24", features = ["rustls-tls-webpki-roots"] }
 futures-util = { version = "0.3", default-features = false, features = ["sink"] }
 hostname = "0.4.2"
 
+# HTTP server (gateway) — replaces raw TCP for proper HTTP/1.1 compliance
+axum = { version = "0.7", default-features = false, features = ["http1", "json", "tokio", "query"] }
+tower = { version = "0.5", default-features = false }
+tower-http = { version = "0.6", default-features = false, features = ["limit", "timeout"] }
+http-body-util = "0.1"
+
 [profile.release]
 opt-level = "z"      # Optimize for size
 lto = true          # Link-time optimization