[Improve] Top-align settings form labels with multi-line fields

[roomote-roomote]

Opened on behalf of Matt Rubens. Follow up by mentioning @roomote-roomote, in the web UI, or in Discord.

What changed

Settings form label columns now top-align with their fields instead of vertically centering when inputs stack with helper text (for example Add Provider on Models).

• Inference provider add/edit dialog form rows use top alignment
• Single-line provider list rows stay center-aligned via a separate list row class (so Tailwind utility order cannot leave them top-aligned)
• Same top-align treatment on related compute and source-control credential form rows

Why this change was made

Multi-line fields (input + helper text) made centered labels look floated mid-field instead of sitting with the control.

Impact

Form labels sit at the top of each field column next to the input, while compact list rows stay vertically centered.

Screenshots

[roomote-roomote]

No code issues found. See task

• apps/web/src/components/settings/InferenceProviderSection.tsx:146,568,628 The shared row class includes md:items-start, which Tailwind emits after md:items-center; its generated rule therefore wins and these single-line provider rows remain top-aligned rather than centered. Keep items-start off the shared class or apply it only to the credential form rows.

_{Reviewed db477b4}

[roomote-roomote]

Fixed the list-row alignment collision in db477b4: shared row class no longer sets vertical alignment; form rows use md:items-start and list rows use md:items-center exclusively.

db477b49