fix: stop reporting cache-hit rate and cost across all UI surfaces (#52717)
* fix: stop reporting cache-hit rate and cost across all UI surfaces
Cost estimates and cache read/write token reporting are unreliable on
providers that don't surface cached_tokens (e.g. ollama-cloud, which doesn't
implement prompt_tokens_details.cached_tokens), producing misleading
near-zero 'cache hit' readouts and cost figures. Remove cost + cache-hit
reporting from every user-facing surface; keep input/output/total token
counts (provider-agnostic and accurate) and the Nous account billing UI
(real account money, separate from per-conversation estimates).
Surfaces:
- CLI /usage + model-info: drop cost lines + cache read/write token lines
- Gateway /usage + /model: drop cost + cache lines
- tui_gateway/server.py: stop emitting cost_usd / cache_read in usage and
subagent.complete payloads
- TUI (Ink): drop cost from status bar (+ showCost plumbing), /usage panel,
thinking rollup, agents overlay (incl. compare view); keep token counts
- Desktop Command Center: drop cost stat, per-model cost, actual-cost hint
Underlying estimate_usage_cost / format_cost / insights cost columns are
left intact but no longer surfaced (display-only change, reversible).
* test: update TUI + gateway + CLI tests for removed cost/cache-hit reporting
- CLI /usage test asserts cost/cache lines are absent, tokens present
- gateway /usage test drops cost + cache asserts; removes cost-included test
- TUI subagentTree summary expectation drops the cost segment
- useConfigSync + appChrome status-rule tests drop showCost prop/state
fd2a35b169