Add full monorepo: virtual-banker, backend, frontend, docs, scripts, deployment

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/safety/filter.go

@@ -0,0 +1,68 @@
+package safety
+
+import (
+	"context"
+	"strings"
+)
+
+// Filter filters content for safety
+type Filter interface {
+	Filter(ctx context.Context, text string) (*FilterResult, error)
+}
+
+// FilterResult contains filtering results
+type FilterResult struct {
+	Allowed    bool
+	Blocked    bool
+	Redacted   string
+	Categories []string // e.g., "profanity", "pii", "abuse"
+}
+
+// ContentFilter implements content filtering
+type ContentFilter struct {
+	blockedWords []string
+}
+
+// NewContentFilter creates a new content filter
+func NewContentFilter() *ContentFilter {
+	return &ContentFilter{
+		blockedWords: []string{
+			// Add blocked words/phrases
+		},
+	}
+}
+
+// Filter filters content
+func (f *ContentFilter) Filter(ctx context.Context, text string) (*FilterResult, error) {
+	lowerText := strings.ToLower(text)
+	var categories []string
+
+	// Check for blocked words
+	for _, word := range f.blockedWords {
+		if strings.Contains(lowerText, strings.ToLower(word)) {
+			categories = append(categories, "profanity")
+			return &FilterResult{
+				Allowed:    false,
+				Blocked:    true,
+				Redacted:   f.redactPII(text),
+				Categories: categories,
+			}, nil
+		}
+	}
+
+	// TODO: Add more sophisticated filtering (ML models, etc.)
+
+	return &FilterResult{
+		Allowed:  true,
+		Blocked:  false,
+		Redacted: f.redactPII(text),
+	}, nil
+}
+
+// redactPII redacts personally identifiable information
+func (f *ContentFilter) redactPII(text string) string {
+	// TODO: Implement PII detection and redaction
+	// For now, return as-is
+	return text
+}
+