feat: add i18n descriptions to all hands and channels (#22)

Add [i18n.zh], [i18n.zh-TW], [i18n.ja], [i18n.ko], [i18n.de], [i18n.es]
sections with translated descriptions to:
- 15 Hand TOML files (hands/*/HAND.toml)
- 44 Channel TOML files (channels/*.toml)

This enables the website to display localized Hand and Channel descriptions
based on the user's selected language.

hands/predictor/HAND.toml

@@ -1054,7 +1054,7 @@ activation_warning = "Predictor hand runs continuously and generates predictions
 
 [i18n.zh]
 name = "预测 Hand"
-description = "自主预测智能体——收集信号、构建推理链、做出校准预测并追踪准确度"
+description = "自主预测器——收集信号、构建推理链、做出校准预测并追踪准确率"
 category = "数据"
 
 [i18n.zh.settings.prediction_domain]
@@ -1089,11 +1089,14 @@ description = "纳入预测报告的最低置信度"
 label = "逆向思维模式"
 description = "主动寻找并展示与主流共识相反的预测"
 
+[i18n.zh-TW]
+description = "自主預測器——收集訊號、建構推理鏈、做出校準預測並追蹤準確率"
+
 # ─── Japanese (日本語) ────────────────────────────────────────────────────
 
 [i18n.ja]
 name = "予測 Hand"
-description = "自律型予測エージェント——シグナル収集、推論チェーン構築、キャリブレーション済み予測、精度追跡"
+description = "自律型予測エンジン——シグナル収集、推論チェーン構築、校正済み予測と精度追跡"
 category = "データ"
 
 [i18n.ja.settings.prediction_domain]
@@ -1132,7 +1135,7 @@ description = "コンセンサスに反する予測を積極的に探索・提
 
 [i18n.es]
 name = "Hand de Predicciones"
-description = "Predictor autónomo del futuro — recopila señales, construye cadenas de razonamiento, genera predicciones calibradas y rastrea la precisión"
+description = "Predictor autónomo — recopila señales, construye cadenas de razonamiento, hace predicciones calibradas y rastrea la precisión"
 category = "Datos"
 
 [i18n.es.settings.prediction_domain]
@@ -1210,7 +1213,7 @@ description = "Rechercher et présenter activement des prédictions contraires a
 
 [i18n.de]
 name = "Vorhersage-Hand"
-description = "Autonomer Vorhersage-Agent — Signalerfassung, Aufbau von Argumentationsketten, kalibrierte Vorhersagen und Genauigkeitsverfolgung"
+description = "Autonomer Zukunftsprädiktor — sammelt Signale, baut Argumentationsketten, erstellt kalibrierte Vorhersagen und verfolgt die Genauigkeit"
 category = "Daten"
 
 [i18n.de.settings.prediction_domain]
@@ -1249,7 +1252,7 @@ description = "Aktiv nach Vorhersagen suchen und präsentieren, die dem Konsens
 
 [i18n.ko]
 name = "예측 Hand"
-description = "자율 미래 예측 에이전트 — 신호 수집, 추론 체인 구축, 보정된 예측 수행 및 정확도 추적"
+description = "자율 예측기 — 신호 수집, 추론 체인 구축, 보정된 예측 및 정확도 추적"
 category = "데이터"
 
 [i18n.ko.settings.prediction_domain]