[abusch]

A pass over the codebase to simplify architecture and code reuse, plus the fixes that turned up along the way. Each commit is one self-contained step.

Fixes

• Display paths (fix: show items under the paths rustdoc publishes them at): Universe::new now derives the reader-facing std:: spelling the way rustdoc's HTML inlining does. It walks each crate's public namespace, follows named and glob re-exports across crates, and skips #[doc(no_inline)]. This replaces the hard-coded mirror list, which had started showing Rc as std::rc after nightly moved it.
• Module listings now include unions, statics, and attribute and derive macros. For example, MaybeUninit was missing from std::mem.
• Code fences are classified the way rustdoc's LangString::parse does. Unknown words mean another language, and hidden # lines are only stripped from Rust blocks.
• Deprecation notices are bold, so they outweigh unstable ones; the two used to be identical.

Refactors

• kind.rs: one place that names and classifies item kinds.
• page.rs: the builder owns its sections, member rows share a single push_member, and default_expanded is gone.
• render.rs: link ids travel beside spans instead of being smuggled through underline_color. The syntax theme is derived from DEFAULT_THEME, padding goes through one pad_to, and rules use a theme style.
• app.rs: current_mut(), a single resize(w, h), and help as an overlay flag.
• main.rs: the status message is cleared inside handle_key, and dead key arms are removed.
• format.rs: shared path, reference, returns and parameter helpers.

Tests

Tests now assert on page structure (targets, sections) rather than scraped text. Redundant tests are removed, and text_of copies are replaced with Line::to_string().

Other

• chore: update dependencies
• chore: switch the default theme to Catppuccin Mocha

Verification

cargo test, cargo clippy --all-targets -- -D warnings and cargo fmt --check pass on every step. The refactors were also checked by diffing rendered output before and after across every item in std/core/alloc:

• format.rs: byte-identical.
• render.rs: only wide-character padding changed.
• Link rendering: only adjacent same-target links merged into one tab stop.