refactor: eliminate redundant patterns across codebase

[Copilot]

Systematic cleanup of repeated boilerplate patterns—manual config casts, duplicated HTTP helpers, raw e.printStackTrace(), copy-pasted version-branched constructors, and verbose modifier key checks.

Typed config getters

Added ConfigUtils.getBoolean/getInt/getLong/getFloat/getString to replace ~65 manual casts across 24 files:

// before
if (!(boolean) ConfigUtils.get("filter.Enabled")) { ... }
int vol = ((Number) ConfigUtils.get("notifier.Sound.Volume")).intValue();

// after
if (!ConfigUtils.getBoolean("filter.Enabled")) { ... }
int vol = ConfigUtils.getInt("notifier.Sound.Volume");

Translator HTTP dedup

Extracted AbstractTranslator.buildQueryString(Map) — identical URL-encoding logic was in Google, Microsoft, and Baidu translators.

Structured exception logging

Added LoggerUtils.error(String, Throwable) overload. Replaced all 18 e.printStackTrace() calls with proper SLF4J logging. Removed a throw new Exception() anti-pattern in ConfigStorage.get() that existed solely for stack trace output.

Data-driven KeyboardUtils

Replaced ~50-line switch/case block with EnumMap<KeyModifiers, int[]> lookup tables for required and forbidden modifier keys. Extracted isAnyKeyDown() helper.

Version-branched HoverEvent helper

TextUtils.showTextHoverEvent(Component) centralizes the //? if >=1.21.5 branching for HoverEvent.ShowText vs new HoverEvent(Action.SHOW_TEXT, ...) — used in 10 call sites across 5 files.

Minor cleanups

• ChatColorEraser.work() simplified to computeIfAbsent (matching NickHider)
• Shared TextUtils.evictOldest(Map, int) replaces manual eldest-entry eviction loops in NickHider and TextUtils