style(ui): 全站清除紫色系，统一 Memphis 蜡笔配色

- Logo 渐变从粉紫改为橙/粉/蓝蜡笔色，快门圆点改橙色
- 批量替换 accent：violet→orange、fuchsia→rose、indigo→sky、purple→orange，
  十六进制与 rgb 字面量同步换算为 Tailwind 对应色
- 修复类名合并冲突：管理员筛选 pill 改 fp-orange、会员号改 fp-pink（新增），
  style.css 中去重 fp-rose/fp-orange 并补 fp-pink 的浅色模式变体
- 选区色、标签输入框、筛选 pill、图表、滑块等所有紫色残留全部归位

Generated with [Devin](https://devin.ai)

Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>

frontend/src/components/Logo.vue

@@ -1,7 +1,8 @@
 <script setup>
 // Vivid mark: an open spectrum ring (lens/aperture) around a folded "V", with a
 // shutter dot closing the gap — image + video in one glyph. Transparent
-// background so it reads on both the dark and light shells.
+// background so it reads on both the dark and light shells. Colors follow the
+// memphis crayon palette (orange / pink / blue).
 // Each instance gets unique gradient ids (useId) so multiple logos on one
 // page don't share/clobber defs.
 import { useId } from 'vue'
@@ -18,13 +19,13 @@ const gV = `vv-${uid}`
        xmlns="http://www.w3.org/2000/svg" class="shrink-0">
     <defs>
       <linearGradient :id="gRing" x1="6" y1="6" x2="42" y2="42" gradientUnits="userSpaceOnUse">
-        <stop stop-color="#e879f9" />
-        <stop offset="0.5" stop-color="#8b5cf6" />
+        <stop stop-color="#ec5b13" />
+        <stop offset="0.5" stop-color="#f472b6" />
         <stop offset="1" stop-color="#38bdf8" />
       </linearGradient>
       <linearGradient :id="gV" x1="14" y1="14" x2="34" y2="34" gradientUnits="userSpaceOnUse">
-        <stop stop-color="#f0abfc" />
-        <stop offset="1" stop-color="#8b5cf6" />
+        <stop stop-color="#f97316" />
+        <stop offset="1" stop-color="#ec5b13" />
       </linearGradient>
     </defs>
 
@@ -35,7 +36,7 @@ const gV = `vv-${uid}`
       <!-- folded V -->
       <path d="M-8 -7.5 L0 9 L8 -7.5" fill="none" :stroke="`url(#${gV})`" stroke-width="4.8"
             stroke-linecap="round" stroke-linejoin="round" />
-      <circle cx="13" cy="-13" r="3.4" fill="#38bdf8" />
+      <circle cx="13" cy="-13" r="3.4" fill="#ec5b13" />
     </g>
   </svg>
 </template>