chore: standardise, Justfile, (rename,, fix, parse, errors,, remove, useless, commands)

Batch Justfile audit: standardised naming (lowercase→Justfile),
fixed parse errors, removed useless build-riscv from non-Rust repos,
added missing assail recipe, and fixed code quality issues.

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

Author: hyperpolymath

Justfile

@@ -75,6 +75,9 @@ lint:
 fmt:
     cargo fmt -- --check
 
+# Check formatting without modifying
+fmt-check:
+    cargo fmt --all --check
 # Full CI check (fmt + lint + test)
 ci: fmt lint test
 
@@ -129,3 +132,7 @@ completions: build
 build-riscv:
 	@echo "Building for RISC-V..."
 	cross build --target riscv64gc-unknown-linux-gnu
+
+# Run panic-attacker pre-commit scan
+assail:
+    @command -v panic-attack >/dev/null 2>&1 && panic-attack assail . || echo "panic-attack not found — install from https://github.com/hyperpolymath/panic-attacker"