chore: add consistent mise.toml, justfile, and tooling config

justfile

@@ -2,10 +2,41 @@ set shell := ["bash", "-c"]
 
 default: check
 
-# Run clippy and tests
-check:
-    cargo clippy -- -D warnings && cargo test
+[private]
+_ensure_tools:
+    @mise trust --yes . 2>/dev/null; mise install --quiet
+
+# Run all checks (fmt, clippy, test, audit)
+check: fmt-check clippy test audit
+
+# Format code
+fmt: _ensure_tools
+    cargo fmt
+
+# Check formatting without changing files
+fmt-check: _ensure_tools
+    cargo fmt --check
+
+# Lint with clippy
+clippy: _ensure_tools
+    cargo clippy --all-targets -- -D warnings
+
+# Run tests
+test: _ensure_tools
+    cargo test
+
+# Security + license audit
+audit: _ensure_tools
+    cargo deny check
 
 # Build release
-build:
+build: _ensure_tools
     cargo build --release
+
+# Check for outdated dependencies
+outdated: _ensure_tools
+    cargo outdated
+
+# Clean build artifacts
+clean:
+    cargo clean