Initial commit of Descrybe v2 without local scratch artifacts.

Drop one-shot tmp/axe scripts and agent i18n scratch so the Gitea tree is deployable.

apps/api/internal/aiprompts/render.go

@@ -0,0 +1,61 @@
+package aiprompts
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/descrybe/descrybe-v2/apps/api/internal/security"
+)
+
+// varToken matches {{name}} with optional whitespace. Only [a-z0-9_]+ names.
+var varToken = regexp.MustCompile(`\{\{\s*([a-z][a-z0-9_]*)\s*\}\}`)
+
+// Vars is the substitution map for Render (keys without braces).
+type Vars map[string]string
+
+// Render replaces {{var}} tokens. Unknown variables become empty string (safe, deterministic).
+// Templates are sanitized before render; values should already be sanitized by callers.
+func Render(template string, vars Vars) string {
+	template = strings.TrimSpace(template)
+	if template == "" {
+		return ""
+	}
+	return varToken.ReplaceAllStringFunc(template, func(match string) string {
+		sub := varToken.FindStringSubmatch(match)
+		if len(sub) < 2 {
+			return ""
+		}
+		name := sub[1]
+		if vars == nil {
+			return ""
+		}
+		return vars[name]
+	})
+}
+
+// SanitizeTemplate cleans and bounds a stored prompt template.
+func SanitizeTemplate(s string, maxRunes int) string {
+	return security.SanitizePrompt(s, maxRunes)
+}
+
+// ExtractVariables returns unique variable names found in template (sorted order of first appearance).
+func ExtractVariables(template string) []string {
+	matches := varToken.FindAllStringSubmatch(template, -1)
+	if len(matches) == 0 {
+		return nil
+	}
+	seen := map[string]struct{}{}
+	out := make([]string, 0, len(matches))
+	for _, m := range matches {
+		if len(m) < 2 {
+			continue
+		}
+		name := m[1]
+		if _, ok := seen[name]; ok {
+			continue
+		}
+		seen[name] = struct{}{}
+		out = append(out, name)
+	}
+	return out
+}