chore: dark mode feedback tweaks

[briangregoryholmes]

• Focus ring variable incorrectly used color-theme-primary-300 instead of color-theme-300
• Update tooltip font colors
• Remove tooltip border on Vega element
• Invert syntax elements in truncation selector and metadata tooltips
• Switch background/foreground colors for ClickHouseCloud logo depending on mode
• Add opacity to line highlight color in dark mode
• Lower case new-files hex value
• Add derived fg value explanation
• Match editor tooltip to other system tooltips
• Set Rill cloud background to white
• Make bookmarks icon square
• Elevate settings containers in dark mode
• Darken Rill cloud table headers in light mode
• Remove button focus states
• Fix secondary button styles
• Fix link styles
• Improve project/org card gradient in light mode
• Improve Canvas component error states
• Consistent table styling
• Change editor background
• Darken user messages in chat in light mode
• Make AddAsset button secondary
• Tweak icons
• Darken chat input in light mode

Checklist:

• Covered by tests
• Ran it and it works as intended
• Reviewed the diff before requesting a review
• Checked for unhandled edge cases
• Linked the issues it closes
• Checked if the docs need to be updated. If so, create a separate Linear DOCS issue
• Intend to cherry-pick into the release branch
• I'm proud of this work!

[ericokuma]

UXQA:

Rill Developer

Canvas/Explore Editor panel. The fields look disabled

Connector form fields look disabled

The dropdowns look disabled

Too many secondary buttons (if i recall, we had a tertiary state which is dark grey)

[ericokuma]

Rill Cloud UXQA

Fields look disabled in the org config page

I also liked the previous iteration where the footer div was a different shade

as in, everything looks too white

Search bars look disabled

these look disabled

Form fields look disabled

Hard to read Alerts form