test(ui): cover Newline, autoColor, and the spinner (74.7% -> 100%)

[LukasWodka]

Wave-2 coverage for internal/ui: 74.7% → 100%.

• Newline (was 0%).
• autoColor: NO_COLOR-set, non-*os.File, and non-terminal *os.File arms.
• Spinner/run/Stop: static (color-off) one-liner + animated (color-on) goroutine. The animated test sleeps past one 120ms tick to cover run's tick arm, then Stop drains the goroutine before the buffer is read — race-clean under -race.

make ci green.

🤖 Generated with Claude Code

[LukasWodka]

bugbot run

[LukasWodka]

👋 Heads-up — Code review queue is at 32 / 30

Above the WIP limit. The team convention is to review existing PRs before opening new work.

Open PRs currently in Code review (oldest first):

• averaging-service#181 — feat(weights): normalize-on-read — mixed cycles average instead of rejecting (SEC-03 §8 step 2) · author: @shujaatTracebloc · no reviewer assigned
• averaging-service#182 — feat(weights): averaging writes SafeTensors (TF + PyTorch) — SEC-03 §8 step 4 · author: @shujaatTracebloc · no reviewer assigned
• backend#1079 — feat(global_meta): edge dataset_meta exposure + attributes contract at ingest (#924 G4a) · author: @divyasinghds · no reviewer assigned
• backend#1086 — docs(rfc): SafeTensors weight-format migration — SEC-03 Phase 1 (RFC 0004) · author: @shujaatTracebloc · no reviewer assigned
• backend#1093 — chore(deps): bump django from 5.2.14 to 5.2.15 · author: @dependabot · no reviewer assigned
• backend#1095 — feat(experiment): configurable preprocessing knobs incl. tabular scaler — RFC 0003 L1 + L1b (#1094) · author: @LukasWodka · no reviewer assigned
• backend#1100 — fix(boot): pin SDK install to tracebloc==0.11.2, drop 404 dev line (#1098) · author: @LukasWodka · reviewer: @saqlainsyed007
• cli#266 — main - > enhance CLI features and tests · author: @saadqbal · no reviewer assigned
• cli#267 — fix(cli): home screen labels the env by remembered client name (bugbot main - > enhance CLI features and tests #266) · author: @saadqbal · reviewer: @aptracebloc
• cli#268 — test: coverage wave 2 — utility packages toward 95% · author: @LukasWodka · no reviewer assigned

Pull from review before opening new work. (This is a nudge from the kanban WIP check, not a block.)

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[saadqbal]

LGTM 👍 autoColor (NO_COLOR / non-file / non-TTY arms) and both spinner modes check out — static path's nil stop makes Stop() an idempotent no-op, and the animated Stop() drains via <-done before the buffer read, so it's clean under -race. Nice to get ui to 100%.