refactor(utils→import): move single-consumer date/html/level helpers, inline field into fonts

Finding 4 — consumer-count verification:
  @reactive-resume/utils/date  → 1 consumer (packages/import/src/json-resume.tsx)
  @reactive-resume/utils/html  → 1 consumer (packages/import/src/json-resume.tsx)
  @reactive-resume/utils/level → 1 consumer (packages/import/src/json-resume.tsx)
  @reactive-resume/utils/url   → 4 consumers (auth, api/ai, import, server) — SKIPPED, stays in utils
  @reactive-resume/utils/field → 1 consumer (packages/fonts/src/index.ts)

Move date/html/level source + test files into packages/import and update json-resume.tsx imports.
Inline the two-line unique() helper into fonts/src/index.ts and drop the ./field subpath.
Drop the three moved subpaths from packages/utils exports.

Claude-Session: https://claude.ai/code/session_012Bnvt1MghwHj4qQRxuQUGa

packages/import/src/html.ts

@@ -0,0 +1,31 @@
+/**
+ * Converts a summary string and optional highlights array into an HTML description.
+ * Summary becomes a <p> tag, highlights become a <ul> list.
+ */
+export function toHtmlDescription(summary?: string, highlights?: string[]): string {
+	const parts: string[] = [];
+
+	if (summary) {
+		parts.push(`<p>${summary}</p>`);
+	}
+
+	if (highlights && highlights.length > 0) {
+		parts.push("<ul>");
+
+		for (const highlight of highlights) {
+			parts.push(`<li>${highlight}</li>`);
+		}
+
+		parts.push("</ul>");
+	}
+
+	return parts.join("");
+}
+
+/**
+ * Converts an array of strings into an HTML unordered list.
+ */
+export function arrayToHtmlList(items: string[]): string {
+	if (items.length === 0) return "";
+	return `<ul>${items.map((item) => `<li>${item}</li>`).join("")}</ul>`;
+}