feat(apollo-vertex): shell component cleanup and MRS alignment

[creilly11235]

Summary

• Refactor shell-company with explicit isCustom boolean (replaces unreliable !darkUrl heuristic)
• Simplify shell-language-toggle implementation
• Swap shell-login to vertex Button component
• Remove dead shell-theme-toggle component (logic lives in UserProfileMenuItems)
• Update SVG logos and locale key

Split from #468 — this is the foundational cleanup needed before animation work.

Test plan

• Company logo renders correctly with custom and default logos
• Language toggle works in both sidebar and minimal header
• Login button renders with vertex Button styling
• No regressions in shell layout

🤖 Generated with Claude Code

[github-actions]

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Project	Deployment	Review	Updated (PT)
apollo-design	🟢 Ready	Preview, Logs	Apr 17, 2026, 06:51:55 PM
apollo-docs	🟢 Ready	Preview, Logs	Apr 17, 2026, 06:50:56 PM
apollo-landing	🟢 Ready	Preview, Logs	Apr 17, 2026, 06:50:22 PM
apollo-ui-react	🟢 Ready	Preview, Logs	Apr 17, 2026, 06:50:28 PM
apollo-vertex	🟢 Ready	Preview, Logs	Apr 17, 2026, 06:51:37 PM

[github-actions]

Dependency License Review

• ✅ 1941 package(s) scanned
• ✅ No license issues found
• ⚠️ 3 package(s) excluded (see details below)

License distribution

License	Packages
MIT	1701
ISC	89
Apache-2.0	61
BSD-3-Clause	28
BSD-2-Clause	23
BlueOak-1.0.0	8
MPL-2.0	5
MIT OR Apache-2.0	3
MIT-0	3
CC0-1.0	3
LGPL-3.0-or-later	2
(MIT OR Apache-2.0)	2
Unlicense	2
Python-2.0	1
CC-BY-4.0	1
(MPL-2.0 OR Apache-2.0)	1
Unknown	1
Artistic-2.0	1
(WTFPL OR MIT)	1
(BSD-2-Clause OR MIT OR Apache-2.0)	1
CC-BY-3.0	1
0BSD	1
(MIT OR CC0-1.0)	1
MIT AND ISC	1

Excluded packages

Package	Version	License	Reason
@img/sharp-libvips-linux-x64	1.2.4	LGPL-3.0-or-later	LGPL pre-built binary, not linked
@img/sharp-libvips-linuxmusl-x64	1.2.4	LGPL-3.0-or-later	LGPL pre-built binary, not linked
khroma	2.1.0	Unknown	MIT per GitHub repo, missing license field in package.json