refactor(utils): replace MONTH_NAMES array, drop @uiw/color-convert, use z.enum for localeSchema

Finding 1: Replace hand-rolled MONTH_NAMES[12] array with Intl.DateTimeFormat("en-US", {month:"long"}).
Finding 2: Drop @uiw/color-convert fallback — parseColorString already rejects the same inputs, return "#000000" instead. Remove dep from utils and server package.json.
Finding 3: Replace 56 z.literal calls in z.union with z.enum([...]); identical parse behavior and inferred type.

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

packages/utils/src/locale.ts

@@ -1,61 +1,62 @@
 import z from "zod";
 
-export const localeSchema = z.union([
-	z.literal("af-ZA"),
-	z.literal("am-ET"),
-	z.literal("ar-SA"),
-	z.literal("az-AZ"),
-	z.literal("bg-BG"),
-	z.literal("bn-BD"),
-	z.literal("ca-ES"),
-	z.literal("cs-CZ"),
-	z.literal("da-DK"),
-	z.literal("de-DE"),
-	z.literal("el-GR"),
-	z.literal("en-US"),
-	z.literal("en-GB"),
-	z.literal("es-ES"),
-	z.literal("fa-IR"),
-	z.literal("fi-FI"),
-	z.literal("fr-FR"),
-	z.literal("he-IL"),
-	z.literal("hi-IN"),
-	z.literal("hu-HU"),
-	z.literal("id-ID"),
-	z.literal("it-IT"),
-	z.literal("ja-JP"),
-	z.literal("km-KH"),
-	z.literal("kn-IN"),
-	z.literal("ko-KR"),
-	z.literal("lt-LT"),
-	z.literal("lv-LV"),
-	z.literal("ml-IN"),
-	z.literal("mr-IN"),
-	z.literal("ms-MY"),
-	z.literal("ne-NP"),
-	z.literal("nl-NL"),
-	z.literal("no-NO"),
-	z.literal("or-IN"),
-	z.literal("pl-PL"),
-	z.literal("pt-BR"),
-	z.literal("pt-PT"),
-	z.literal("ro-RO"),
-	z.literal("ru-RU"),
-	z.literal("sk-SK"),
-	z.literal("sl-SI"),
-	z.literal("sq-AL"),
-	z.literal("sr-SP"),
-	z.literal("sv-SE"),
-	z.literal("ta-IN"),
-	z.literal("te-IN"),
-	z.literal("th-TH"),
-	z.literal("tr-TR"),
-	z.literal("uk-UA"),
-	z.literal("uz-UZ"),
-	z.literal("vi-VN"),
-	z.literal("zh-CN"),
-	z.literal("zh-TW"),
-	z.literal("zu-ZA"),
+// ponytail: z.enum([...]) over 56 z.literal calls; same parse behavior, same inferred union type
+export const localeSchema = z.enum([
+	"af-ZA",
+	"am-ET",
+	"ar-SA",
+	"az-AZ",
+	"bg-BG",
+	"bn-BD",
+	"ca-ES",
+	"cs-CZ",
+	"da-DK",
+	"de-DE",
+	"el-GR",
+	"en-US",
+	"en-GB",
+	"es-ES",
+	"fa-IR",
+	"fi-FI",
+	"fr-FR",
+	"he-IL",
+	"hi-IN",
+	"hu-HU",
+	"id-ID",
+	"it-IT",
+	"ja-JP",
+	"km-KH",
+	"kn-IN",
+	"ko-KR",
+	"lt-LT",
+	"lv-LV",
+	"ml-IN",
+	"mr-IN",
+	"ms-MY",
+	"ne-NP",
+	"nl-NL",
+	"no-NO",
+	"or-IN",
+	"pl-PL",
+	"pt-BR",
+	"pt-PT",
+	"ro-RO",
+	"ru-RU",
+	"sk-SK",
+	"sl-SI",
+	"sq-AL",
+	"sr-SP",
+	"sv-SE",
+	"ta-IN",
+	"te-IN",
+	"th-TH",
+	"tr-TR",
+	"uk-UA",
+	"uz-UZ",
+	"vi-VN",
+	"zh-CN",
+	"zh-TW",
+	"zu-ZA",
 ]);
 
 export type Locale = z.infer<typeof localeSchema>;