feat(claude-code): role-based model mapping with display names and 1M flag

- Replace the four flat env inputs with a Sonnet/Opus/Haiku role table.
  Each row exposes ANTHROPIC_DEFAULT_*_MODEL plus a new display name
  field ANTHROPIC_DEFAULT_*_MODEL_NAME, and Sonnet/Opus gain a
  "Declare 1M" checkbox that toggles the [1M] suffix.
- Strip the [1M] context-capability marker before forwarding non-Copilot
  requests upstream. Copilot keeps its existing [1m]->-1m normalization.
- Claude Desktop import now consumes ANTHROPIC_DEFAULT_*_MODEL_NAME as
  label_override, closing the Claude Code -> Claude Desktop displayName
  pipeline; add_route's merge logic is shared between hashmap branches.
- Unify the [1M] marker as ONE_M_CONTEXT_MARKER across
  claude_desktop_config and proxy::model_mapper; rename the strip
  helper to strip_one_m_suffix_for_upstream.
- Collapse useModelState's seven duplicated useState initializers and
  the useEffect parse block into a single parseModelsFromConfig call.
- Add tests/hooks/useModelState.test.tsx and a Claude Desktop import
  test covering Kimi K2 -> label_override. i18n (en/ja/zh) updated.

src-tauri/src/proxy/forwarder.rs

@@ -803,6 +803,14 @@ impl RequestForwarder {
             .and_then(|meta| meta.is_full_url)
             .unwrap_or(false);
 
+        // GitHub Copilot API 使用 /chat/completions（无 /v1 前缀）
+        let is_copilot = provider
+            .meta
+            .as_ref()
+            .and_then(|m| m.provider_type.as_deref())
+            == Some("github_copilot")
+            || base_url.contains("githubcopilot.com");
+
         // 应用模型映射（独立于格式转换）
         // Claude Desktop proxy 模式必须先把 Desktop 可见的 claude-* route
         // 映射成真实上游模型名，并且未知 route 要直接报错，不能使用默认模型兜底。
@@ -818,20 +826,14 @@ impl RequestForwarder {
         // 与 CCH 对齐：请求前不做 thinking 主动改写（仅保留兼容入口）
         let mut mapped_body = normalize_thinking_type(mapped_body);
 
-        // 确定有效端点
-        // GitHub Copilot API 使用 /chat/completions（无 /v1 前缀）
-        let is_copilot = provider
-            .meta
-            .as_ref()
-            .and_then(|m| m.provider_type.as_deref())
-            == Some("github_copilot")
-            || base_url.contains("githubcopilot.com");
-
         if is_copilot {
             mapped_body =
                 super::providers::copilot_model_map::apply_copilot_model_normalization(mapped_body);
             self.apply_copilot_live_model_resolution(provider, &mut mapped_body)
                 .await;
+        } else {
+            mapped_body =
+                super::model_mapper::strip_one_m_suffix_for_upstream_from_body(mapped_body);
         }
 
         // --- Copilot 优化器：分类 + 请求体优化（在格式转换之前执行） ---

src-tauri/src/proxy/model_mapper.rs

@@ -2,6 +2,7 @@
 //!
 //! 在请求转发前，根据 Provider 配置替换请求中的模型名称
 
+use crate::claude_desktop_config::ONE_M_CONTEXT_MARKER;
 use crate::provider::Provider;
 use serde_json::Value;
 
@@ -112,6 +113,33 @@ pub fn apply_model_mapping(
     (body, original_model, None)
 }
 
+/// Claude Code 通过 `[1M]` 后缀声明 100 万上下文能力；上游 API
+/// 通常不接受这个本地能力标记，转发前需要剥离。
+pub fn strip_one_m_suffix_for_upstream(model: &str) -> &str {
+    let trimmed = model.trim_end();
+    let marker = ONE_M_CONTEXT_MARKER.as_bytes();
+    let bytes = trimmed.as_bytes();
+    if bytes.len() >= marker.len()
+        && bytes[bytes.len() - marker.len()..].eq_ignore_ascii_case(marker)
+    {
+        return trimmed[..trimmed.len() - marker.len()].trim_end();
+    }
+    model
+}
+
+pub fn strip_one_m_suffix_for_upstream_from_body(mut body: Value) -> Value {
+    let Some(model) = body.get("model").and_then(Value::as_str) else {
+        return body;
+    };
+
+    let stripped = strip_one_m_suffix_for_upstream(model);
+    if stripped != model {
+        log::debug!("[ModelMapper] 去除本地 1M 标记: {model} → {stripped}");
+        body["model"] = serde_json::json!(stripped);
+    }
+    body
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
@@ -251,4 +279,34 @@ mod tests {
         assert_eq!(result["model"], "sonnet-mapped");
         assert_eq!(mapped, Some("sonnet-mapped".to_string()));
     }
+
+    #[test]
+    fn strips_one_m_suffix_before_upstream() {
+        let body = json!({"model": "deepseek-v4-pro[1M]"});
+        let result = strip_one_m_suffix_for_upstream_from_body(body);
+        assert_eq!(result["model"], "deepseek-v4-pro");
+    }
+
+    #[test]
+    fn strips_one_m_suffix_after_mapping() {
+        let mut provider = create_provider_with_mapping();
+        provider.settings_config = json!({
+            "env": {
+                "ANTHROPIC_DEFAULT_SONNET_MODEL": "deepseek-v4-pro [1M]"
+            }
+        });
+
+        let body = json!({"model": "claude-sonnet-4-6"});
+        let (mapped, _, _) = apply_model_mapping(body, &provider);
+        let result = strip_one_m_suffix_for_upstream_from_body(mapped);
+
+        assert_eq!(result["model"], "deepseek-v4-pro");
+    }
+
+    #[test]
+    fn keeps_model_without_one_m_suffix() {
+        let body = json!({"model": "deepseek-v4-pro"});
+        let result = strip_one_m_suffix_for_upstream_from_body(body);
+        assert_eq!(result["model"], "deepseek-v4-pro");
+    }
 }