Applies consistent warm cream/amber palette across all pages

Changes

• CSS Custom Properties: Defined warm cream/amber design system in with semantic color variables
• Pages Updated: Landing, Home, ListView, Profile, JoinList, Login
• Components Updated: All components with blue/indigo colors replaced with warm amber/orange alternatives
• Priority Indicators: Low priority changed from blue to amber
• Interactive Elements: All buttons, badges, and highlights now use warm palette
• Brand Consistency: Maintains 💩 brand identity with warm, inviting colors

Colors Replaced

• Blue/Indigo backgrounds → Amber/Orange backgrounds
• Blue text → Amber/Orange text
• Blue borders/rings → Amber/Orange borders/rings
• Cold grays → Warm neutrals (where appropriate)

Testing

• ✅ Build passes (vite v7.3.1 building client environment for production...
  transforming...
  ✓ 918 modules transformed.
  rendering chunks...
  computing gzip size...
  dist/index.html 2.81 kB │ gzip: 1.11 kB
  dist/assets/index-CRYbUfPs.css 85.62 kB │ gzip: 12.99 kB
  dist/assets/convex-vendor-l0sNRNKZ.js 0.00 kB │ gzip: 0.02 kB
  dist/assets/index-Bl40T3GB.js 0.18 kB │ gzip: 0.16 kB
  dist/assets/index-DVRRp7NC.js 0.34 kB │ gzip: 0.26 kB
  dist/assets/index-BjyNKKn2.js 0.37 kB │ gzip: 0.27 kB
  dist/assets/time-C9oM0N83.js 0.38 kB │ gzip: 0.26 kB
  dist/assets/web-VJUgYPV0.js 0.43 kB │ gzip: 0.29 kB
  dist/assets/index-kmxptNnG.js 0.49 kB │ gzip: 0.29 kB
  dist/assets/web-CvAbxYi4.js 0.49 kB │ gzip: 0.25 kB
  dist/assets/index-ZDcxVlva.js 0.49 kB │ gzip: 0.30 kB
  dist/assets/index-BSqIwUlt.js 0.51 kB │ gzip: 0.30 kB
  dist/assets/web-B_Vhmd_k.js 0.83 kB │ gzip: 0.40 kB
  dist/assets/web-BBeBivmc.js 0.97 kB │ gzip: 0.49 kB
  dist/assets/web-8wt_PBVm.js 1.22 kB │ gzip: 0.60 kB
  dist/assets/web-DE3Xqs5G.js 1.32 kB │ gzip: 0.63 kB
  dist/assets/ChangeCategoryDialog-Bw1CH0_N.js 1.68 kB │ gzip: 0.87 kB
  dist/assets/DeleteListDialog-C0UAtkDY.js 1.74 kB │ gzip: 0.88 kB
  dist/assets/CategorySelector-CqWHAyMY.js 2.16 kB │ gzip: 0.93 kB
  dist/assets/RenameListDialog-iHBbZoA1.js 2.19 kB │ gzip: 1.06 kB
  dist/assets/JoinList-CCG3ZVOa.js 2.63 kB │ gzip: 1.11 kB
  dist/assets/builtinTemplates-EtaNu8I6.js 3.18 kB │ gzip: 1.29 kB
  dist/assets/index-oizXKlgu.js 4.45 kB │ gzip: 1.72 kB
  dist/assets/usePullToRefresh-BJYQtRkR.js 4.78 kB │ gzip: 2.01 kB
  dist/assets/EmptyState-Cl9suFqq.js 5.10 kB │ gzip: 1.49 kB
  dist/assets/ShareModal-apZENDaI.js 5.41 kB │ gzip: 1.97 kB
  dist/assets/Login-CYnkGOhV.js 5.50 kB │ gzip: 2.21 kB
  dist/assets/PriorityFocus-01f8nx91.js 5.78 kB │ gzip: 2.07 kB
  dist/assets/Templates-BEJCaUA1.js 5.90 kB │ gzip: 1.76 kB
  dist/assets/SaveAsTemplateModal-DjOKho8v.js 6.07 kB │ gzip: 2.08 kB
  dist/assets/index-BaX6wXGJ.js 6.61 kB │ gzip: 2.68 kB
  dist/assets/PublicList-CpF1vAdd.js 6.72 kB │ gzip: 2.23 kB
  dist/assets/Landing-DKNsWlX9.js 7.43 kB │ gzip: 2.33 kB
  dist/assets/PublishModal-BdFbcv9C.js 7.85 kB │ gzip: 2.51 kB
  dist/assets/Profile-jT7BT95r.js 7.90 kB │ gzip: 2.04 kB
  dist/assets/ProvenanceInfo-BhdkCWTv.js 12.97 kB │ gzip: 3.60 kB
  dist/assets/ItemDetailsModal-CrGZM6RF.js 22.25 kB │ gzip: 6.11 kB
  dist/assets/Home-C6kqaPLa.js 34.72 kB │ gzip: 8.15 kB
  dist/assets/react-vendor-B_q3RUma.js 50.14 kB │ gzip: 17.70 kB
  dist/assets/ListView-Cw2pJhSq.js 82.60 kB │ gzip: 21.89 kB
  dist/assets/index-C4cpukBS.js 315.97 kB │ gzip: 95.81 kB
  dist/assets/originals-sdk-N9Al7R5s.js 485.34 kB │ gzip: 150.73 kB
  dist/assets/index-QPwEEUZT.js 661.31 kB │ gzip: 197.23 kB
  ✓ built in 3.66s)
• ✅ All pages maintain good contrast and accessibility
• ✅ Warm palette applied consistently throughout the app