feat(experts): add built-in expert skills with per-agent activation

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

src-tauri/Cargo.toml

@@ -84,6 +84,8 @@ prost = "0.13"
 rand = "0.8"
 qrcode = "0.14"
 image = { version = "0.25", default-features = false, features = ["png"] }
+include_dir = "0.7"
+sha2 = "0.10"
 
 [target.'cfg(not(any(target_os = "android", target_os = "ios")))'.dependencies]
 tauri-plugin-window-state = { version = "2", optional = true }
@@ -96,6 +98,7 @@ mac-notification-sys = "0.6"
 
 [target.'cfg(target_os = "windows")'.dependencies]
 windows-sys = { version = "0.59", features = ["Win32_Storage_FileSystem"] }
+junction = "1"
 
 [patch.crates-io]
 sacp-tokio = { path = "vendor/sacp-tokio" }