feat(float): rebuild right floating buttons 1:1 with reference theme

- Storage: aksrt_floating_buttons now uses reference float_btn shape
  (fixed 8 sortable types, more-buttons group); single source of
  defaults/sanitize in AKSRT\Settings\FloatButtons
- Admin SPA: CSF-parity page split into components/floating/*
- Frontend: aksrt_float_right() on wp_footer mirrors zib_float_right()
  (wp_is_mobile, PC tooltip, toggle-theme, ontop/scrollTopTo, qrcode,
  wechat/qq, pay_vip, add, more)
- CSS: floating-buttons.css rewritten from reference rules; legacy float
  rules removed from main/part/shell/overlay-primitives
- Remove dead code: reorder route/API, get_floating_buttons_items,
  floatingSchema, floatActionsId, float-theme-toggle bindings,
  common/floating.css, aksrt-runtime-win.php, .aksrt-float-btn

assets/admin/src/components/floating/FloatBtnItemPanel.vue

@@ -0,0 +1,169 @@
+<template>
+  <div class="float-btn-panel">
+    <div class="float-btn-panel__head" @click="expanded = !expanded">
+      <button type="button" class="float-btn-panel__handle" aria-label="拖拽排序" @click.stop>
+        <i class="fa fas fa-arrows-alt-v" />
+      </button>
+      <strong class="float-btn-panel__title">{{ meta.title }}</strong>
+      <template v-if="modelValue.type !== 'more'">
+        <n-tag v-if="modelValue.pc_s" size="small" type="info" :bordered="false">PC</n-tag>
+        <n-tag v-if="modelValue.m_s" size="small" type="warning" :bordered="false">移动</n-tag>
+        <n-tag v-if="!modelValue.pc_s && !modelValue.m_s" size="small" :bordered="false">未显示</n-tag>
+      </template>
+      <n-tag v-else size="small" :bordered="false">{{ modelValue.buttons.length }} 个</n-tag>
+      <i class="fa fas float-btn-panel__arrow" :class="expanded ? 'fa-angle-up' : 'fa-angle-down'" />
+    </div>
+
+    <div v-if="meta.warn" class="float-btn-panel__warn">
+      <i class="fa fas fa-info-circle" /> {{ meta.warn }}
+    </div>
+
+    <div v-show="expanded" class="float-btn-panel__body">
+      <div class="float-btn-panel__subtitle">{{ meta.panel }}</div>
+
+      <FloatMoreButtonsEditor
+        v-if="modelValue.type === 'more'"
+        :model-value="modelValue.buttons"
+        @update:model-value="patch({ buttons: $event })"
+      />
+
+      <template v-else>
+        <FloatBtnCommonFields :model-value="modelValue" @update:model-value="emit('update:modelValue', $event)" />
+
+        <n-form label-placement="left" label-width="110" class="aksrt-form float-btn-panel__extra">
+          <n-form-item v-if="modelValue.type === 'qrcode'" label="一句话简介">
+            <n-input :value="modelValue.desc" @update:value="patch({ desc: $event })" />
+          </n-form-item>
+
+          <template v-if="modelValue.type === 'add'">
+            <n-form-item label="选择按钮">
+              <div class="float-btn-panel__block">
+                <n-select
+                  :value="modelValue.btns"
+                  :options="ADD_BTN_OPTIONS"
+                  multiple
+                  placeholder="请选择按钮"
+                  @update:value="patch({ btns: $event })"
+                />
+                <div class="float-btn-panel__desc">选择并排序按钮，未开启的功能不会显示</div>
+              </div>
+            </n-form-item>
+            <n-form-item label="按钮图标">
+              <FaIconPicker v-model="addIcon" placeholder="选择图标" />
+            </n-form-item>
+          </template>
+
+          <n-form-item v-if="modelValue.type === 'service_qq'" label="QQ号码">
+            <n-input :value="modelValue.qq" placeholder="仅填写数字" @update:value="patch({ qq: $event })" />
+          </n-form-item>
+
+          <n-form-item v-if="modelValue.type === 'service_wechat'" label="微信二维码">
+            <AksMediaField
+              :model-value="modelValue.wechat_img"
+              placeholder="选择二维码图片"
+              @update:model-value="patch({ wechat_img: $event })"
+            />
+          </n-form-item>
+        </n-form>
+      </template>
+    </div>
+  </div>
+</template>
+
+<script setup>
+import { computed, ref } from 'vue'
+import FaIconPicker from '@/components/form/FaIconPicker.vue'
+import AksMediaField from '@/components/form/AksMediaField.vue'
+import FloatBtnCommonFields from './FloatBtnCommonFields.vue'
+import FloatMoreButtonsEditor from './FloatMoreButtonsEditor.vue'
+import { ADD_BTN_OPTIONS, FLOAT_BTN_META } from './floating-defaults.js'
+
+const props = defineProps({
+  modelValue: { type: Object, required: true },
+})
+const emit = defineEmits(['update:modelValue'])
+
+const expanded = ref(false)
+const meta = computed(() => FLOAT_BTN_META[props.modelValue.type] || { title: props.modelValue.type, panel: '' })
+
+const addIcon = computed({
+  get: () => props.modelValue.icon || '',
+  set: (value) => patch({ icon: value || '' }),
+})
+
+function patch(partial) {
+  emit('update:modelValue', { ...props.modelValue, ...partial })
+}
+</script>
+
+<style scoped>
+.float-btn-panel {
+  border: 1px solid var(--n-border-color, rgba(0, 0, 0, 0.09));
+  border-radius: 8px;
+  background: var(--n-card-color, #fff);
+}
+
+.float-btn-panel__head {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+  padding: 10px 14px;
+  cursor: pointer;
+  user-select: none;
+}
+
+.float-btn-panel__handle {
+  width: 26px;
+  height: 26px;
+  border: 0;
+  background: transparent;
+  color: var(--n-text-color-3, #999);
+  cursor: grab;
+}
+
+.float-btn-panel__handle:active {
+  cursor: grabbing;
+}
+
+.float-btn-panel__title {
+  font-size: 14px;
+}
+
+.float-btn-panel__arrow {
+  margin-left: auto;
+  color: var(--n-text-color-3, #999);
+}
+
+.float-btn-panel__warn {
+  padding: 0 14px 10px 48px;
+  font-size: 12px;
+  color: #f0a020;
+}
+
+.float-btn-panel__body {
+  padding: 12px 16px 16px;
+  border-top: 1px solid var(--n-border-color, rgba(0, 0, 0, 0.09));
+}
+
+.float-btn-panel__subtitle {
+  font-weight: 600;
+  font-size: 13px;
+  margin-bottom: 12px;
+}
+
+.float-btn-panel__extra {
+  margin-top: 12px;
+}
+
+.float-btn-panel__block {
+  display: flex;
+  flex-direction: column;
+  gap: 6px;
+  width: 100%;
+}
+
+.float-btn-panel__desc {
+  font-size: 12px;
+  color: var(--n-text-color-3, #999);
+}
+</style>