🏗️ refactor: Replace model categories with vendor-based filtering and optimize data structure

- **Backend Changes:**
  - Refactor pricing API to return separate vendors array with ID-based model references
  - Remove redundant vendor_name/vendor_icon fields from pricing records, use vendor_id only
  - Add vendor_description to pricing response for frontend display
  - Maintain 1-minute cache protection for pricing endpoint security

- **Frontend Data Flow:**
  - Update useModelPricingData hook to build vendorsMap from API response
  - Enhance model records with vendor info during data processing
  - Pass vendorsMap through component hierarchy for consistent vendor data access

- **UI Component Replacements:**
  - Replace PricingCategories with PricingVendors component for vendor-based filtering
  - Replace PricingCategoryIntro with PricingVendorIntro in header section
  - Remove all model category related components and logic

- **Header Improvements:**
  - Implement vendor intro with real backend data (name, icon, description)
  - Add text collapsible feature (2-line limit with expand/collapse functionality)
  - Support carousel animation for "All Vendors" view with vendor icon rotation

- **Model Detail Modal Enhancements:**
  - Update ModelHeader to use real vendor icons via getLobeHubIcon()
  - Move tags from header to ModelBasicInfo content area to avoid SideSheet title width constraints
  - Display only custom tags from backend with stringToColor() for consistent styling
  - Use Space component with wrap property for proper tag layout

- **Table View Optimizations:**
  - Integrate RenderUtils for description and tags columns
  - Implement renderLimitedItems for tags (max 3 visible, +x popover for overflow)
  - Use renderDescription for text truncation with tooltip support

- **Filter Logic Updates:**
  - Vendor filter shows disabled options instead of hiding when no models match
  - Include "Unknown Vendor" category for models without vendor information
  - Remove all hardcoded vendor descriptions, use real backend data

- **Code Quality:**
  - Fix import paths after component relocation
  - Remove unused model category utilities and hardcoded mappings
  - Ensure consistent vendor data usage across all pricing views
  - Maintain backward compatibility with existing pricing calculation logic

This refactor provides a more scalable vendor-based architecture while eliminating
data redundancy and improving user experience with real-time backend data integration.

web/src/components/common/ui/RenderUtils.jsx

@@ -0,0 +1,60 @@
+/*
+Copyright (C) 2025 QuantumNous
+
+This program is free software: you can redistribute it and/or modify
+it under the terms of the GNU Affero General Public License as
+published by the Free Software Foundation, either version 3 of the
+License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU Affero General Public License for more details.
+
+You should have received a copy of the GNU Affero General Public License
+along with this program. If not, see <https://www.gnu.org/licenses/>.
+
+For commercial licensing, please contact support@quantumnous.com
+*/
+
+import React from 'react';
+import { Space, Tag, Typography, Popover } from '@douyinfe/semi-ui';
+
+const { Text } = Typography;
+
+// 通用渲染函数：限制项目数量显示，支持popover展开
+export function renderLimitedItems({ items, renderItem, maxDisplay = 3 }) {
+  if (!items || items.length === 0) return '-';
+  const displayItems = items.slice(0, maxDisplay);
+  const remainingItems = items.slice(maxDisplay);
+  return (
+    <Space spacing={1} wrap>
+      {displayItems.map((item, idx) => renderItem(item, idx))}
+      {remainingItems.length > 0 && (
+        <Popover
+          content={
+            <div className='p-2'>
+              <Space spacing={1} wrap>
+                {remainingItems.map((item, idx) => renderItem(item, idx))}
+              </Space>
+            </div>
+          }
+          position='top'
+        >
+          <Tag size='small' shape='circle' color='grey'>
+            +{remainingItems.length}
+          </Tag>
+        </Popover>
+      )}
+    </Space>
+  );
+}
+
+// 渲染描述字段，长文本支持tooltip
+export const renderDescription = (text, maxWidth = 200) => {
+  return (
+    <Text ellipsis={{ showTooltip: true }} style={{ maxWidth }}>
+      {text || '-'}
+    </Text>
+  );
+};