feat: Add init command to generate evidence.yaml templates with built-in user agent profiles.

Author: canaria-computer

.gitignore

@@ -98,4 +98,8 @@ $RECYCLE.BIN/
 # Windows shortcuts
 *.lnk
 
-# End of https://www.toptal.com/developers/gitignore/api/go,windows,linux,macos
+# End of https://www.toptal.com/developers/gitignore/api/go,windows,linux,macos
+
+# Application generated files
+evidence.yaml
+screenshot.*

README.md

@@ -142,67 +142,20 @@ OK.
 
 ### 2.4 組み込みUser Agent定義
 
-```go
-// internal/browser/useragent.go
-type UserAgentProfile struct {
-    Name             string
-    UserAgentString  string
-    ViewportWidth    int
-    ViewportHeight   int
-    Mobile           bool
-    TouchSupport     bool
-}
+✅ **実装済み**: `internal/config/useragent.go`
 
-// 組み込みUA（user_agent_stringが省略可能）
-var BuiltinUserAgents = map[string]UserAgentProfile{
-    "Desktop_Chrome": {
-        Name:            "Desktop_Chrome",
-        UserAgentString: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36",
-        ViewportWidth:   1920,
-        ViewportHeight:  1080,
-        Mobile:          false,
-    },
-    "Desktop_Firefox": {
-        Name:            "Desktop_Firefox",
-        UserAgentString: "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:133.0) Gecko/20100101 Firefox/133.0",
-        ViewportWidth:   1920,
-        ViewportHeight:  1080,
-        Mobile:          false,
-    },
-    "Mobile_Safari": {
-        Name:            "Mobile_Safari",
-        UserAgentString: "Mozilla/5.0 (iPhone; CPU iPhone OS 17_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/17.2 Mobile/15E148 Safari/604.1",
-        ViewportWidth:   390,
-        ViewportHeight:  844,
-        Mobile:          true,
-        TouchSupport:    true,
-    },
-    "Mobile_Chrome": {
-        Name:            "Mobile_Chrome",
-        UserAgentString: "Mozilla/5.0 (Linux; Android 14) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.6778.135 Mobile Safari/537.36",
-        ViewportWidth:   412,
-        ViewportHeight:  915,
-        Mobile:          true,
-        TouchSupport:    true,
-    },
-    "Android_Webview_Google": {
-        Name:            "Android_Webview_Google",
-        UserAgentString: "Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.135 Mobile Safari/537.36",
-        ViewportWidth:   412,
-        ViewportHeight:  915,
-        Mobile:          true,
-        TouchSupport:    true,
-    },
-    "Android_Webview_LINE": {
-        Name:            "Android_Webview_LINE",
-        UserAgentString: "Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/131.0.6778.135 Mobile Safari/537.36 Line/14.0.1",
-        ViewportWidth:   412,
-        ViewportHeight:  915,
-        Mobile:          true,
-        TouchSupport:    true,
-    },
-}
-```
+組み込みUser Agentプロファイル:
+- Desktop: Chrome, Firefox, Safari
+- Mobile: Chrome, Safari, Firefox, Samsung Internet
+- WebView: Android Webview (Google), Android Webview (LINE)
+
+デフォルト選択 (opt-out):
+| Browser  | Mobile | Desktop |
+|----------|--------|---------|
+| Chrome   | ✅     | ✅      |
+| Safari   | ✅     | ⬜      |
+| Firefox  | ⬜     | ⬜      |
+| Samsung  | ✅     | N/A     |
 
 ### 2.5 証拠データ構造
 
@@ -443,11 +396,13 @@ down-force lite -c evidence.yaml
 
 ### 4.2 初期化コマンド
 
+✅ **実装済み**: `cmd/init.go`, `internal/config/template.go`
+
 ```bash
 # テンプレート生成（デフォルトUA付き）
 down-force init [filename]
 
-# インタラクティブ生成
+# インタラクティブ生成（huh TUI）
 down-force init --interactive
 
 # 最小テンプレート（UA 1つのみ）
@@ -457,6 +412,8 @@ down-force init --minimal
 down-force init --stdout
 ```
 
+生成されるYAMLには `yaml-language-server` スキーマ参照が自動的に含まれます。
+
 ### 4.3 検証コマンド
 
 ```bash