0.11.0: 旗舰版功能补齐(License/登录记录/会话管理/角色管理/门户定时任务/模型配额/输出脱敏/供应链扫描/记忆管理/AI助手/真实概览)

- 新增迁移 000031-000034(登录日志/角色/模型配额/记忆)
- 新增包: license/memory/modelquota/assistant,扫描引擎
- 全部功能后端+前端+端到端验证通过(25 包单测)

internal/gateway/output_policy.go

@@ -0,0 +1,111 @@
+package gateway
+
+import (
+	"bytes"
+	"io"
+	"strings"
+)
+
+// outputRedactReadCloser 对上游模型响应应用输出侧脱敏(隐私信息拦截替换):
+//   - 非流式(application/json):首次 Read 前缓冲整个响应,处理后再输出;
+//   - 流式(text/event-stream):逐 data 行处理,不改变事件边界。
+type outputRedactReadCloser struct {
+	io.ReadCloser
+	engine interface {
+		OutputRedact([]byte) ([]byte, bool)
+	}
+	sse     bool
+	buffered []byte // 已处理待输出的字节
+	done    bool    // 非流式已完成缓冲与处理
+	pending []byte  // 流式:未完成的行
+}
+
+func newOutputRedactReadCloser(body io.ReadCloser, contentType string, engine interface {
+	OutputRedact([]byte) ([]byte, bool)
+}) io.ReadCloser {
+	if engine == nil {
+		return body
+	}
+	return &outputRedactReadCloser{
+		ReadCloser: body, engine: engine,
+		sse: strings.Contains(strings.ToLower(contentType), "text/event-stream"),
+	}
+}
+
+func (r *outputRedactReadCloser) Read(buffer []byte) (int, error) {
+	if !r.sse {
+		// 非流式:首次 Read 时一次性缓冲+处理。
+		if !r.done {
+			r.done = true
+			raw, err := io.ReadAll(r.ReadCloser)
+			_ = err
+			if replaced, changed := r.engine.OutputRedact(raw); changed {
+				r.buffered = replaced
+			} else {
+				r.buffered = raw
+			}
+		}
+		if len(r.buffered) == 0 {
+			return 0, io.EOF
+		}
+		n := copy(buffer, r.buffered)
+		r.buffered = r.buffered[n:]
+		if len(r.buffered) == 0 {
+			return n, io.EOF
+		}
+		return n, nil
+	}
+	// 流式:先输出已处理的行,再读上游。
+	if len(r.buffered) > 0 {
+		n := copy(buffer, r.buffered)
+		r.buffered = r.buffered[n:]
+		return n, nil
+	}
+	chunk := make([]byte, 32<<10)
+	n, err := r.ReadCloser.Read(chunk)
+	if n > 0 {
+		r.pending = append(r.pending, chunk[:n]...)
+		r.processLines()
+	}
+	if err == io.EOF && len(r.pending) > 0 {
+		// 流结束:剩余不完整行原样输出(不处理,避免破坏事件边界)。
+		r.buffered = append(r.buffered, r.pending...)
+		r.pending = nil
+	}
+	if len(r.buffered) > 0 {
+		n2 := copy(buffer, r.buffered)
+		r.buffered = r.buffered[n2:]
+		return n2, err
+	}
+	return n, err
+}
+
+// processLines 把 pending 中的完整行处理进 buffered。
+func (r *outputRedactReadCloser) processLines() {
+	for {
+		index := bytes.IndexByte(r.pending, '\n')
+		if index < 0 {
+			return
+		}
+		line := r.pending[:index]
+		r.pending = r.pending[index+1:]
+		trimmed := strings.TrimSpace(string(line))
+		if !strings.HasPrefix(trimmed, "data:") {
+			r.buffered = append(r.buffered, line...)
+			r.buffered = append(r.buffered, '\n')
+			continue
+		}
+		payload := strings.TrimSpace(strings.TrimPrefix(trimmed, "data:"))
+		if payload == "" || payload == "[DONE]" {
+			r.buffered = append(r.buffered, line...)
+			r.buffered = append(r.buffered, '\n')
+			continue
+		}
+		if replaced, changed := r.engine.OutputRedact([]byte(payload)); changed {
+			r.buffered = append(r.buffered, []byte("data: "+string(replaced)+"\n")...)
+		} else {
+			r.buffered = append(r.buffered, line...)
+			r.buffered = append(r.buffered, '\n')
+		}
+	}
+}