fix(packages): fix type errors in consolidated packages + add missing files

- credits: fix mobile import paths (./operations → ../operations)
- feedback: fix createFeedbackService import (./feedback → ./api),
  recover missing types.ts from git history
- help: add package files (were untracked after consolidation)
- Update lockfile after package restructuring

All packages pass tsc --noEmit (excluding expected .svelte imports).

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

packages/help/src/parser.ts

@@ -0,0 +1,87 @@
+/**
+ * Markdown + Frontmatter Parser
+ * Parses Markdown files with YAML frontmatter
+ */
+
+import matter from 'gray-matter';
+import { marked } from 'marked';
+import type { ZodType, ZodTypeDef } from 'zod';
+import { sanitizeHtml } from './sanitize.js';
+
+export interface ParsedContent<T> {
+	frontmatter: T;
+	content: string;
+	html: string;
+}
+
+export interface ParseOptions {
+	/** Convert Markdown to HTML */
+	renderHtml?: boolean;
+}
+
+/**
+ * Parse a Markdown file with frontmatter
+ */
+export function parseMarkdown<T>(
+	rawContent: string,
+	schema?: ZodType<T, ZodTypeDef, unknown>,
+	options: ParseOptions = { renderHtml: true }
+): ParsedContent<T> {
+	const { data, content } = matter(rawContent);
+
+	// Validate frontmatter if schema provided
+	let frontmatter: T;
+	if (schema) {
+		const result = schema.safeParse(data);
+		if (!result.success) {
+			throw new Error(`Invalid frontmatter: ${result.error.message}`);
+		}
+		frontmatter = result.data;
+	} else {
+		frontmatter = data as T;
+	}
+
+	// Render HTML if requested, then sanitize to prevent XSS
+	const html = options.renderHtml ? sanitizeHtml(marked.parse(content) as string) : '';
+
+	return {
+		frontmatter,
+		content: content.trim(),
+		html,
+	};
+}
+
+/**
+ * Parse multiple Markdown files
+ */
+export function parseMarkdownFiles<T>(
+	files: { filename: string; content: string }[],
+	schema?: ZodType<T, ZodTypeDef, unknown>,
+	options?: ParseOptions
+): Array<ParsedContent<T> & { filename: string }> {
+	return files.map(({ filename, content }) => ({
+		filename,
+		...parseMarkdown<T>(content, schema, options),
+	}));
+}
+
+/**
+ * Extract text content from HTML (for search indexing)
+ */
+export function stripHtml(html: string): string {
+	return html
+		.replace(/<[^>]*>/g, ' ')
+		.replace(/\s+/g, ' ')
+		.trim();
+}
+
+/**
+ * Generate excerpt from content
+ */
+export function generateExcerpt(content: string, maxLength = 150): string {
+	const text = stripHtml(content);
+	if (text.length <= maxLength) {
+		return text;
+	}
+	return text.substring(0, maxLength).trim() + '...';
+}