feat(redis): shared key browser with grouped tree + cursor pagination

New src/features/redis/keyBrowser/ shared by RedisDetailPage keys tab and
SchemaSidebar redis branch (both previously flat one-shot lists):
- keyTree: ':'-separated folder tree with recursive key counts, numeric
  sort, exact-hit pinned at root, local key removal (no full refetch),
  type color dots, readable TTL (45s/5m30s/2d5h)
- useRedisKeyBrowser: cursor state machine + request-sequence guard +
  Map merge on load-more; setter-synced args (Enter right after typing
  no longer races stale render), auto-search on db/instance change
- RedisKeyBrowser: enter-to-scan search bar (SCAN has cost - no debounce,
  opsxdb-style) with clear button, effective type filter, load-more
  button with cursor hint, '已全部加载' end state
- useRedisDbs: real db list from /redis/:id/dbs (cluster -> DB0 banner)
- RedisDetailPage: hash row edits now use field-level HSET/HDEL endpoint
  (preserves other fields + TTL); delete/add update tree locally; CLI
  output renders arrays/objects/errors properly
- SchemaSidebar: redis branch swaps to shared browser (compact mode,
  inline detail preview + insert-command preserved), auto-switches to
  Keys tab for redis instances
- vite dev proxy target overridable via API_PROXY_TARGET (local testing)

Browser-verified: 200/page with load-more (200->400->600), exact hit
badge, keyword auto-expand, key detail panel, queries sidebar

frontend/vite.config.ts

@@ -1,16 +1,20 @@
-import { execSync } from "child_process"
-import fs from "fs"
-import path from "path"
-import react from "@vitejs/plugin-react"
-import { defineConfig } from "vite"
+import { execSync } from 'child_process';
+import fs from 'fs';
+import path from 'path';
+import react from '@vitejs/plugin-react';
+import { defineConfig } from 'vite';
 
 // 构建指纹：版本 + commit hash + 构建时间（设置页「关于」展示，排障救命）
-const pkg = JSON.parse(fs.readFileSync(path.resolve(__dirname, "package.json"), "utf-8"))
+const pkg = JSON.parse(fs.readFileSync(path.resolve(__dirname, 'package.json'), 'utf-8'));
 const gitHash = (() => {
-  try { return execSync("git rev-parse --short HEAD").toString().trim() } catch { return "unknown" }
-})()
-const buildTime = new Date().toISOString()
-const APP_VERSION = `${pkg.version}+${gitHash} (${buildTime.slice(0, 16)})`
+  try {
+    return execSync('git rev-parse --short HEAD').toString().trim();
+  } catch {
+    return 'unknown';
+  }
+})();
+const buildTime = new Date().toISOString();
+const APP_VERSION = `${pkg.version}+${gitHash} (${buildTime.slice(0, 16)})`;
 
 export default defineConfig({
   base: '/',
@@ -35,14 +39,15 @@ export default defineConfig({
     strictPort: true,
     proxy: {
       '/api': {
-        target: 'http://localhost:9000',
+        // 本地联调可用 API_PROXY_TARGET=http://localhost:9001 npm run dev 指向测试实例
+        target: process.env.API_PROXY_TARGET || 'http://localhost:9000',
         changeOrigin: true,
       },
     },
   },
   resolve: {
     alias: {
-      "@": path.resolve(__dirname, "./src"),
+      '@': path.resolve(__dirname, './src'),
     },
   },
 });