feat(reader): legado 书源规则引擎 Go 移植 + 阅读 P0 后端

- internal/service/reader/rule/：逐方法移植 legado analyzeRule 包
  （AnalyzeRule/AnalyzeByJSoup/AnalyzeByJSonPath/AnalyzeByXPath/
  AnalyzeByRegex/AnalyzeUrl/RuleAnalyzer），JS 规则留 P2 接入点
- 书源导入（JSON数组/对象/Base64/URL）、多源聚合搜索（legado 四档
  排序合并）、详情/目录/正文（nextContentUrl 翻页合并）
- 数据模型 4 表注册迁移；/api/reader/* 路由组（书源/搜索/书架/进度/调试）
- 单测 + httptest 全链路端到端测试
- docs/reader-ui-spec.md：legado UI 交互仿制规格（供 P1 前端使用）

go.mod

@@ -1,6 +1,6 @@
 module github.com/truewhile/MeBox
 
-go 1.25.0
+go 1.26.0
 
 require (
 	fyne.io/systray v1.12.2
@@ -19,9 +19,9 @@ require (
 	github.com/stretchr/testify v1.11.1
 	github.com/ulikunitz/xz v0.5.15
 	go.uber.org/zap v1.27.0
-	golang.org/x/crypto v0.49.0
+	golang.org/x/crypto v0.55.0
 	golang.org/x/image v0.45.0
-	golang.org/x/sync v0.22.0
+	golang.org/x/sync v0.23.0
 	golang.org/x/sys v0.47.0
 	golang.org/x/time v0.15.0
 	gopkg.in/yaml.v3 v3.0.1
@@ -30,6 +30,12 @@ require (
 )
 
 require (
+	github.com/PaesslerAG/gval v1.0.0 // indirect
+	github.com/PaesslerAG/jsonpath v0.1.1 // indirect
+	github.com/PuerkitoBio/goquery v1.13.0 // indirect
+	github.com/andybalholm/cascadia v1.3.4 // indirect
+	github.com/antchfx/htmlquery v1.3.6 // indirect
+	github.com/antchfx/xpath v1.3.6 // indirect
 	github.com/bytedance/gopkg v0.1.4 // indirect
 	github.com/bytedance/sonic v1.15.0 // indirect
 	github.com/bytedance/sonic/loader v0.5.0 // indirect
@@ -38,6 +44,7 @@ require (
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
 	github.com/disintegration/imaging v1.6.3-0.20201218193011-d40f48ce0f09 // indirect
+	github.com/dlclark/regexp2 v1.12.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
 	github.com/esimov/pigo v1.4.7-0.20240801095032-7465ed14de47 // indirect
 	github.com/gabriel-vasile/mimetype v1.4.13 // indirect
@@ -50,6 +57,7 @@ require (
 	github.com/goccy/go-json v0.10.6 // indirect
 	github.com/goccy/go-yaml v1.19.2 // indirect
 	github.com/godbus/dbus/v5 v5.1.0 // indirect
+	github.com/golang/groupcache v0.0.0-20241129210726-2c02b8208cf8 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
@@ -90,8 +98,8 @@ require (
 	go.uber.org/multierr v1.10.0 // indirect
 	golang.org/x/arch v0.25.0 // indirect
 	golang.org/x/exp v0.0.0-20251023183803-a4bb9ffd2546 // indirect
-	golang.org/x/net v0.52.0 // indirect
-	golang.org/x/text v0.41.0 // indirect
+	golang.org/x/net v0.58.0 // indirect
+	golang.org/x/text v0.42.0 // indirect
 	google.golang.org/protobuf v1.36.11 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	modernc.org/libc v1.70.0 // indirect