fix: Resolve : ambiguity in URL path placeholders (#465)

Co-authored-by: Simon Johansson <simon.johansson@infor.com>
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Co-authored-by: Gregory Schier <gschier1990@gmail.com>

apps/yaak-client/lib/pathPlaceholders.ts

@@ -0,0 +1,14 @@
+/**
+ * Extract `:name`-style path placeholders from a URL string.
+ *
+ * A placeholder is `:` followed by one-or-more characters that are not `/`, `?`,
+ * `#`, or `:`. The `:` boundary means a placeholder ends where a literal colon
+ * starts in the same segment, e.g. `/tasks/:id:increment-importance` yields one
+ * placeholder `:id` and `:increment-importance` is literal text.
+ *
+ * Only `:` that sits at the start of a `/`-delimited segment counts — `/abc:def`
+ * has no placeholders. Returned names include the leading colon.
+ */
+export function extractPathPlaceholders(url: string): string[] {
+  return Array.from(url.matchAll(/\/(:[^/?#:]+)/g)).map((m) => m[1] ?? "");
+}