style(web): align the service page tabs - #2013

🟢 Confidence 10/10 · safe to merge. Re-review of the two files changed since ccf26d5; the stale/loading/error branches are correct and pinned by scene tests.
_{no findings · tests covered · risk low}

The files changed since the last review give the Dependencies tab a loading skeleton and a real error state, and keep its last rows when a reload fails. Both behaviours are pinned by scene tests; safe to merge.

• dependenciesTab renders a skeleton while the read is in flight and errorState when a first read fails
• A failed reload renders the retained rows through onStale instead of an empty table

_{eec3168 · Reply "won't fix" to dismiss a finding, or mention @maple-review-bot to ask about one.}