#167: Fix all 7 clippy warnings — annotated SeamMetadata dead fields,
removed unused should_cycle calls, collapsed nested ifs, fixed
useless_format and nonminimal_bool.
#168: Wire TokenUsage mailbox drain to subagent_cost accumulator.
handle_subagent_mailbox now intercepts TokenUsage before routing to
cards, computes cost via calculate_turn_cost, and increments
app.subagent_cost in real time. Footer reflects live sub-agent spend.
Restored ArchivedContext variant to HistoryCell (corrupted by prior
apply_patch). Version bump to 0.7.2.
Refs: #166, #167, #168
Not referenced from README.md, docs/, npm/, or any Cargo metadata.
README uses assets/screenshot.png. Reduces repo size by 226 KB.
Also cleaned up working-directory cruft (untracked, no commit needed):
apps/ (empty), python/ (empty after egg-info removed),
counterpoint.copilot.db, firebase-debug.log, excalidraw.log, .DS_Store.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>