feat(ui): update logo text from 'Kilo Code' to 'Kilo' (#1427)

## Summary

Updated the logo text in the upper left corner of the application from
"Kilo Code" to "Kilo". This change affects both the desktop sidebar
header and mobile header components to maintain consistency across all
views.

Changes made:
- Updated HeaderLogo component text from "Kilo Code" to "Kilo"
- Updated AnimatedLogo component text from "Kilo Code" to "Kilo" 
- Updated accessibility labels to reflect the new branding

## Verification

- [x] Verified changes apply to both desktop sidebar (HeaderLogo) and
mobile header (AnimatedLogo)
- [x] Confirmed accessibility labels were updated accordingly
- [x] Text formatting and styling remain unchanged

## Reviewer Notes

Simple text change affecting two logo components. The change maintains
all existing hover animations, styling, and functionality while updating
the brand text display.

Author: emilieschario

src/components/AnimatedLogo.tsx

@@ -49,7 +49,7 @@ export function AnimatedLogo() {
         {/* Fallback image for browsers that don't support video */}
         <Image src="/kilo-v1.svg" alt="Kilo Code Logo" width={48} height={48} className="mr-2" />
       </video>
-      <h1 className="text-3xl leading-[0.8] font-bold tracking-tighter">Kilo Code</h1>
+      <h1 className="text-3xl leading-[0.8] font-bold tracking-tighter">Kilo</h1>
     </Link>
   );
 }

src/components/HeaderLogo.tsx

@@ -61,7 +61,7 @@ export default function HeaderLogo({ className, href }: HeaderLogoProps) {
           </motion.div>
         </AnimatePresence>
       </motion.div>
-      <span className="text-3xl font-bold whitespace-nowrap">Kilo Code</span>
+      <span className="text-3xl font-bold whitespace-nowrap">Kilo</span>
     </>
   );
 
@@ -85,7 +85,7 @@ export default function HeaderLogo({ className, href }: HeaderLogoProps) {
             'focus:text-brand-primary focus:ring-brand-primary focus:ring-3',
             className
           )}
-          aria-label="Kilo Code Homepage"
+          aria-label="Kilo Homepage"
         >
           {logoContent}
         </Link>