feat: move projects to sidebar rail and speed up session switching (#506)

* feat: move projects from header tabs to left sidebar rail

* refactor: remove variant from git generation session context

* feat: implemented drandrop action for navrails

* refactor: improve sidebar drag-and-drop smoothness and remove floating overlay

* fix: prevent mobile nav rail touch from closing drawer and opening menu

* fix: hide header tabs on desktop

* fix: prevent session flicker when switching projects

* style: soften chat panel divider borders

* style: improve icon contrast across core navigation

* fix: stabilize session selection during project switching

* style: unify sidebar surfaces and transparent section layers

* style: remove UI shadows and keep only scroll shadow

* perf: speed up project switching with cached session loading

* perf: speed up Git changes view and background refresh

* perf: make session switching lighter and less aggressive

* perf: optimized sessions list loading while project switching

* perf: smooth chat rendering and reduce interaction spikes

* fix: restore reliable load older messages visibility

packages/ui/src/components/views/git/CommitInput.tsx

@@ -45,7 +45,7 @@ export const CommitInput: React.FC<CommitInputProps> = ({
       autoCapitalize={hasTouchInput ? 'sentences' : 'off'}
       spellCheck={hasTouchInput ? true : false}
       className={cn(
-        'rounded-lg bg-background/80 resize-none overflow-y-auto',
+        'rounded-lg bg-transparent resize-none overflow-y-auto',
         disabled && 'opacity-50'
       )}
       style={{ minHeight: MIN_HEIGHT, maxHeight: MAX_HEIGHT }}