fix: debug and resolve all test failures

[tmck-code]

Context

Three test failures were present on main after recent changes to ops/install.sh (ensure_marketplace/ensure_plugin updated) and an in-progress refactor of Renderer.path_git / fit_path (elapsed moved to a separate elapsed_section() method). A fourth failure (test_yas_full_width_fills_terminal) was caused by host environment variables (YAS_MAX_WIDTH=40) leaking into Config.load() during the test run.

Changes

1. Complete the elapsed_section split (renderer.py + layout.py + tests)

path_git and fit_path no longer accept an elapsed argument — elapsed time is now rendered as a separate section via Renderer.elapsed_section(). The layout.py calls to fit_path were still using the old five-argument form (passing '' for elapsed); those are updated to the new four-argument form. test_path_git.py is rewritten to match: path_git is tested for path/branch/dirty output only, elapsed_section gets its own tests, and the obsolete show_elapsed flag and test_no_elapsed_when_no_commit_still_overflows tests are removed. test_model_section.py similarly drops the elapsed arg from its fit_path calls.

2. Fix install script test assertions (test_install_script.py)

• test_dry_run_marketplace_already_present: ensure_marketplace now runs an update (not a skip) when the marketplace is present — assertion updated from 'already present' or 'skipping' to 'would update marketplace'.
• test_dry_run_would_install_when_plugin_absent: ensure_plugin changed its jq from top-level has("yas@...") to .plugins | has("yas@..."). The test's seed data had the key under .plugins, so the script saw it as installed and printed "Would update" instead of "Would install". Fixed by seeding with key yas-cached@yet-another-statusline — ensure_plugin doesn't find it (wrong name), but do_wire's contains("yas") scan still resolves the installPath.
• Updated _seed_installed_plugins docstring and surrounding comment block to reflect the current jq paths.

3. Isolate width test from host env vars (test_render_callable.py)

Config.load() calls dict(os.environ), so YAS_MAX_WIDTH=40 set in the developer's shell capped the rendered width at 40 instead of DEFAULT_MAX_WIDTH=140. Added monkeypatch.delenv('YAS_MAX_WIDTH', raising=False) (and YAS_FULL_WIDTH) before the test's calls.

Checklist

• Tests added or updated for new/changed behaviour
• (bug fixes) a regression test now covers the situation so it can't come back

Screenshots / recording

• N/A — no visible change

Benchmark

Command	Mean [ms]	Min [ms]	Max [ms]	Relative
main	63.8 ± 1.3	61.6	66.5	1.00
PR	67.8 ± 9.3	62.7	119.7	1.06 ± 0.15

(Outliers detected; within noise — no performance-relevant code changed.)

System info

Key	Value
OS	Linux archlinux 7.0.10-arch1-1 #1 SMP PREEMPT_DYNAMIC Sat, 23 May 2026 14:21:20 +0000 x86_64 GNU/Linux
Claude Code	2.1.167 (Claude Code)
Terminal	TERM=tmux-256color TERM_PROGRAM=tmux SHELL=/bin/bash COLORTERM=truecolor
Locale	LANG=en_AU.UTF-8 LC_ALL=
Python	Python 3.13.1
uv	uv 0.11.14 (x86_64-unknown-linux-gnu)