* Studio: refine chat UI shadow, background and sidebar divider
- Give both chat composers a Gemini style drop shadow with a short
transition, and add a visible shadow in dark mode.
- Set the main chat surface to a soft off white (#fbfbfc) in light mode
so the white composer reads as a card; dark mode is unchanged.
- Remove the divider line between the side menu and the page.
* Studio: lighten chat background to #fcfcfd
* Studio: make dark mode composer shadow visible
* Studio: drop composer shadow in dark mode
* Studio: unify all light mode shadows on the chatbox shadow
* Studio: unify dark mode surface colors and make hover states visible
* Studio: fix barely visible dark mode hover in account and plus menus
* Studio: lift settings dialog off the page background in dark mode
* Studio: drop greeting periods and restyle projects page to match the chatbox
* Studio: chatbox shadow on search dialog, grey sort pill on projects
* Studio: slimmer sidebar profile row, borderless login card
* Studio: match select popups to their trigger, taller profile hover target
* Studio: bigger projects search pill with the original chatbox glow
* Studio: keep select trigger shape while open
* Studio: center and narrow the projects search pill like Gemini
* Studio: borderless export card with the chatbox shadow
* Studio: chatbox shadow for selectable pills, warmer composer, search pill tweaks
* Studio: one warm background token for every page, softer search glow
* Studio: keep off white depth when warming the page background
* Studio: distinct sidebar surface from the page background
* Studio: white sidebar on the warm page background
* Studio: soften projects search shadow
* Studio: nudge the chat zero state up 5px
* Studio: darker dark mode page background, 28.5vh welcome offset
* Studio: dark mode shadows match the chatbox geometry, borderless recipes empty state
* Studio: revert dark mode shadows, desaturate dark recipe cards
* Studio: lift dark recipe cards, no hover shadow in dark
* Studio: drop the pale hover halo on recipe cards
* Studio: lighter dark recipe text, flat dark menus, flush select popups
* Studio: page-bg shadow on model selector, flush popovers and dropdowns
* Studio: zero menu offsets so dropdowns sit flush against triggers
* Studio: one 14px radius for list menus and sidebar buttons
* Studio: 14px buttons, pill hover shapes, narrower slider inputs
* Studio: pill buttons, keep profile row rectangular
* Studio: pill Save and Delete, small gap under account menu
* Studio: skinnier dropdown popups, larger account menu gap
* Studio: dropdown popups slightly wider than their trigger
* Restore light mode sidebar separator line
* Size panel number input pills to their content
* Lighten light mode page background
* Pure white composer, nudge page background whiter
* Use inline ch width for panel number pills
* Fix panel number pills at uniform 4ch width
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Co-authored-by: Daniel Han <danielhanchen@gmail.com>
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