feat(wiki): add Aliases to Entry and read from YAML frontmatter

ingestion/internal/wiki/inventory.go

@@ -32,23 +32,26 @@ func LoadInventory(brainDir string) (map[PageType][]Entry, error) {
 			}
 			slug := strings.TrimSuffix(e.Name(), ".md")
 			path := filepath.Join(dir, e.Name())
-			title := readTitle(path, slug)
-			result[pt] = append(result[pt], Entry{Slug: slug, Title: title, Type: pt})
+			title, aliases := readFrontmatter(path, slug)
+			result[pt] = append(result[pt], Entry{Slug: slug, Title: title, Aliases: aliases, Type: pt})
 		}
 	}
 	return result, nil
 }
 
-// readTitle extracts the title from YAML frontmatter, falling back to slug.
-func readTitle(path, fallback string) string {
+// readFrontmatter extracts title and aliases from YAML frontmatter.
+// Falls back to slug for title and empty aliases on any error.
+func readFrontmatter(path, fallbackSlug string) (title string, aliases []string) {
+	title = fallbackSlug
 	f, err := os.Open(path)
 	if err != nil {
-		return fallback
+		return
 	}
 	defer f.Close()
 
 	scanner := bufio.NewScanner(f)
 	inFM := false
+	inAliases := false
 	for scanner.Scan() {
 		line := scanner.Text()
 		if strings.TrimSpace(line) == "---" {
@@ -56,14 +59,32 @@ func readTitle(path, fallback string) string {
 				inFM = true
 				continue
 			}
-			break
+			break // end of frontmatter
 		}
-		if inFM {
-			key, val, ok := strings.Cut(line, ":")
-			if ok && strings.TrimSpace(key) == "title" {
-				return strings.Trim(strings.TrimSpace(val), `"'`)
+		if !inFM {
+			continue
+		}
+
+		// Detect alias list items (lines starting with "  - ").
+		if inAliases {
+			trimmed := strings.TrimSpace(line)
+			if strings.HasPrefix(trimmed, "- ") {
+				aliases = append(aliases, strings.TrimPrefix(trimmed, "- "))
+				continue
 			}
+			inAliases = false // end of alias block
+		}
+
+		key, val, ok := strings.Cut(line, ":")
+		if !ok {
+			continue
+		}
+		switch strings.TrimSpace(key) {
+		case "title":
+			title = strings.Trim(strings.TrimSpace(val), `"'`)
+		case "aliases":
+			inAliases = true
 		}
 	}
-	return fallback
+	return
 }