Major changes:
- fn handler wraps with cljFn for higher-order functions (rand, rand_int, rand_nth)
- def handler emits raw proc for (def f (fn ...)) context
- Local fn calls use .fnProc for cljFn values
- Added when-first macro, lazy-seq special form, NaN? predicate
- Added delay, rseq, listEmpty runtime functions
- doseq macro uses next instead of rest, recur inside when body
- loop handler pushScope/popScope for proper variable scoping
- let handler: var/while/proc statement checks, block last-line discard
- when handler: proper statement detection for body forms
- defn/defn- allow empty body
- New TUI screens: Main Menu, Compile, Run, REPL, AI Generator, AI Settings, Help
- AI configuration persisted in ~/.config/cljnim/config.json
- Added illwill dependency for terminal UI
- Updated experiments, examples, docs, and core modules