refactor: remove dead code, unused exports and redundant dependencies

- drop dotenv (Node 24 process.loadEnvFile) and dompurify (only used by dead code)
- delete unused ui components/hooks (card, progress, checkbox, use-confirm, use-prompt)
- delete dead sanitizeHtml/sanitizeCss, url-security helpers, patch-resume tool,
  schema/page, createResumePatches, patch-proposal preview builder, fonts fallback helpers
- inline single-caller wrappers (flags service, auth getSession, pdf renderer passthrough)
- deduplicate template color helpers into shared/color-helpers
- unexport 50+ internal-only symbols, remove dead export-map entries
- replace hand-rolled unique()/useIsMobile with Set spread and usehooks-ts

packages/utils/src/locale.ts

@@ -80,7 +80,7 @@ export type Script = "hangul" | "kana" | "han-traditional" | "han-simplified" |
 // The CJK subset of `Script`. CJK needs extra per-character line breaking that
 // must NOT be applied to Arabic (cursive, joined letters) or Thai (combining
 // marks), so callers gate line-breaking on this rather than on `Script`.
-export const cjkScripts: readonly Script[] = ["hangul", "kana", "han-traditional", "han-simplified"];
+const cjkScripts: readonly Script[] = ["hangul", "kana", "han-traditional", "han-simplified"];
 
 export function isCjkScript(script: Script): boolean {
 	return cjkScripts.includes(script);