chore: sweep prose and test conventions

[hakula139]

Summary

Tightens prose and test organization against the repo conventions before the drift gets harder to review. The branch keeps behavior unchanged and focuses on comments, docs, ordering, and test names.

• Clarifies extra_ca_certs user-guide behavior while keeping the trust-setting caveats visible.
• Tightens /compact user-facing docs around resume behavior, tracker reset, and queued prompts without describing raw JSONL mechanics.
• Normalizes high-signal rustdoc / module-doc punctuation and trims redundant comments while keeping comments that encode constraints or regression intent.
• Reorders tests to mirror implementation order, then applies the scenario-focused test-name sweep identified during review.

Design decisions

• Keep durable comments. Comments that encode hidden constraints, regression intent, or API shape were preserved. The cleanup targets punctuation and redundant explanatory comments, not useful rationale.
• Keep compact design docs intact. The /compact design doc is long, but the feature is large enough to justify an internal design record. The user guide was the right place to trim implementation detail.

Changes

File	Description
docs/guide/configuration.md	Tightens extra_ca_certs and auth prose while preserving path-resolution and project-config rejection details.
docs/guide/slash-commands.md	Rewrites /compact docs around visible resume and tracker behavior.
docs/design/slash/compact.md	Renames one design decision heading to avoid contrast-heavy wording.
CLAUDE.md	Fixes awkward punctuation in the lint-suppression convention.
agent/event.rs, session/*, slash/*, tui/*, client/anthropic/*	Normalizes rustdoc/module-doc punctuation on high-signal public surfaces.
client/anthropic.rs, config/oauth.rs, tui/components/chat.rs, tui/components/input.rs, tui/modal/kv_overview.rs	Reorders tests so sections follow implementation order and happy paths precede variants/errors.
client/anthropic.rs, config/oauth.rs, session/*, tui/components/*, tui/theme/loader.rs	Renames tests whose old names described mechanics like returns/routes/sets/appends instead of scenarios.

Test plan

• cargo fmt --all --check
• cargo build
• cargo clippy --all-targets -- -D warnings: zero warnings
• cargo test: 2025 tests pass
• cargo llvm-cov --ignore-filename-regex 'main\.rs': 98.63% line coverage
• pnpm lint: 0 errors
• pnpm spellcheck: 0 issues

[codecov]

Codecov Report

❌ Patch coverage is 99.59016% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
crates/oxide-code/src/client/anthropic.rs	99.35%	1 Missing ⚠️

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