Gate JSDoc completeness on every package export

New doc-sync gate verify-export-jsdoc walks every module-level exported
name under packages/*/*/src and requires description prose everywhere,
plus @param per parameter and @returns on non-void annotated returns for
function-like exports, public class methods, properties, and accessors.
The parsing + check helpers move out of gen-cordis-catalog.ts into a
shared scripts/jsdoc.ts so 'documented' means one thing on both gated
surfaces.

Deliberate exemptions (documented in the RFC): heritage-declared class
members (the seam declaration is the doc's one home — the one checker
query in an otherwise pure-AST walk), cordis plugin-protocol slots
(name/inject/reusable/Config/apply, top-level and static), constructors,
overload implementations, declare-module augmentation bodies, and
re-export statements (checked at the defining module).

The 203 under-documented exports the gate found at adoption are filled
in this change, so the gate lands green; generated catalogs/graphs are
regenerated for the shifted line pointers.

RFC: docs/rfc/implemented/process/2026-07-06-export-surface-jsdoc-gate.md

packages/web/tool-web/src/html.ts

@@ -44,6 +44,10 @@ function safeFromCodePoint(code: number, fallback: string): string {
  * Convert an HTML document to a readable markdown-ish text approximation.
  * Best-effort and lossy by design — fidelity is the job of a future heavier
  * converter, not this fallback.
+ *
+ * @param html - the raw HTML source.
+ * @returns plain text with markdown headings, list bullets, and links;
+ *   whitespace collapsed to at most one blank line and trimmed.
  */
 export function htmlToMarkdown(html: string): string {
   let text = html