Admin UI for log-entry companions

What was done

Added a browser path for editing log-entry companion files. Before this commit, the companion feature was file-based only: the author had to open content/logs/<project>/<slug>.human.mdx in an editor and commit by hand. After this commit there is a list view per project, a per-entry editor, and an API route that writes the file through storage.commitFile and revalidates the affected public paths.

• /admin/projects/<slug>/logs lists every AI log entry for that project (pulled from the satellite repo when logSourceRepo is set, otherwise this repo), each row tagged ✓ companion or + add.
• /admin/projects/<slug>/logs/<entry> is the editor: textarea for the companion body, save / update / delete. The AI body is shown inline above for context.
• POST /api/admin/log-companion and DELETE /api/admin/log-companion commit or remove content/logs/<project>/<slug>.human.mdx and revalidate /projects/<project>, /projects/<project>/log/<slug>, and the /ko mirrors.
• Each row on /admin/projects now has a "Logs" link.

Why it was needed

Stated in the commit message: companions had shipped as a file-only feature in 7f46862, so adding one required a local checkout + manual commit. The point of the admin section is that the owner actually uses it; an authoring step that requires git add defeats that. Companions also live in the blog repo (not the satellite, per 7f46862), so the PAT and storage.commitFile plumbing already existed — this commit was purely the UI on top.

Files / functions changed (real paths)

• app/(admin)/admin/projects/[slug]/logs/page.tsx — list view, calls listProjectLogs + listHumanCompanions and renders the tagged rows.
• app/(admin)/admin/projects/[slug]/logs/[entry]/page.tsx — per-entry editor route, renders CompanionEditor.
• components/admin/CompanionEditor.tsx — client component, textarea + save/delete buttons hitting the API route.
• app/api/admin/log-companion/route.ts — POST and DELETE handlers, both call bumpRelevantPaths(project, slug) to revalidatePath the four affected pages.
• lib/logs.ts — new listHumanCompanions(project) returns a Set<string> of slugs that already have a .human.mdx sibling.
• lib/storage.ts — new saveHumanCompanion / deleteHumanCompanion helpers wrapping commitFile with the correct path layout.
• components/admin/ProjectsList.tsx — added the "Logs" link to each project row.

Total: 367 insertions across 7 files.

Result / verification

The commit message describes the wiring but does not record a verification step. The route shape is internally consistent (list → detail → API → revalidate), and storage.commitFile was already in production use for other admin writes by this point, so the write path was not new code.

Open / what didn't get done

The new routes are [slug]/logs/[entry] under app/(admin)/admin/projects/. The next day this collided with the [locale]/[slug] segment pattern elsewhere in the project tree and caused a production hang on 2026-05-31 — see that day's troubleshoot entry. Nothing in this commit guards against the collision; the issue was not visible until the build/route resolver ran in production.

Commit — 3c8c80f