fix: SEARCH treats /, ., -, : as token separators (BUG 4)

FTS5 tokenizes on these characters, so 'rest/companies' would only match
literal 'rest companies'. Now we replace these separators with spaces in
the query so each segment becomes a separate AND term. This makes path
queries like 'rest/companies' or qualified names like 'Module.Entity'
work intuitively.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: ako

mdl/executor/cmd_catalog.go

@@ -787,9 +787,18 @@ func (e *Executor) execSearch(stmt *ast.SearchStmt) error {
 }
 
 // escapeFTSQuery escapes special characters in FTS5 queries.
+// FTS5 treats characters like '/', '.', '-' as token separators. To make
+// queries like 'rest/companies' or 'Module.Entity' usable, we replace these
+// with spaces (treated as AND between terms).
 func escapeFTSQuery(q string) string {
 	// Escape single quotes for SQL
-	return strings.ReplaceAll(q, "'", "''")
+	q = strings.ReplaceAll(q, "'", "''")
+	// Replace common path/qualified-name separators with spaces so each segment
+	// becomes a separate token that FTS5 ANDs together.
+	for _, sep := range []string{"/", ".", "-", ":"} {
+		q = strings.ReplaceAll(q, sep, " ")
+	}
+	return q
 }
 
 // Search performs a full-text search with the specified output format.