fix(claude-desktop): expose the 1M context variant for DeepSeek V4 routes

The DeepSeek V4 family has a 1M context window - every Codex catalog in
this repo records 1048576 for these ids - but the Claude Desktop presets
that pin them left supports1m off, so the 1M variant never appeared in
Claude Desktop's model list. The [1m] suffix is a Claude Desktop local
marker: it is translated to the supports1m field at the import boundary
and stripped before upstream matching, so turning it on does not change
what is sent to the provider.

Affects Baidu Qianfan Token Plan, DeepSeek and OpenCode Go. PPIO already
had it on.

src/config/claudeDesktopProviderPresets.ts

@@ -975,10 +975,15 @@ export const claudeDesktopProviderPresets: ClaudeDesktopProviderPreset[] = [
     baseUrl: "https://api.deepseek.com/anthropic",
     mode: "proxy",
     apiFormat: "anthropic",
+    // supports1m：两个档位钉的都是 1M 窗口模型（本仓 Codex catalog 记
+    // deepseek-v4-pro / deepseek-flash 均 1048576；haiku 档的
+    // deepseek-v4-flash 被官方端点路由到 V4.1 Flash，窗口同档）。[1m] 只是
+    // Claude Desktop 本地标记，匹配前会被剥掉，不会随请求发往上游
     modelRoutes: brandedRoutes(
       "deepseek-v4-pro",
       "deepseek-v4-pro",
       "deepseek-v4-flash",
+      true,
     ),
     icon: "deepseek",
     iconColor: "#1E88E5",
@@ -994,10 +999,14 @@ export const claudeDesktopProviderPresets: ClaudeDesktopProviderPreset[] = [
     // Go 网关 /messages 收除 grok-4.5 外全部模型（Chat 组靠服务端转换），
     // anthropic 透传即可；上游只认 x-api-key，apiKey 直填默认即该头。
     apiFormat: "anthropic",
+    // supports1m：deepseek-v4-flash 窗口 1M（本仓 Go 网关 Codex catalog
+    // 记 1048576）。[1m] 只是 Claude Desktop 本地标记，匹配前会被剥掉，
+    // 不会随请求发往上游
     modelRoutes: brandedRoutes(
       "deepseek-v4-flash",
       "deepseek-v4-flash",
       "deepseek-v4-flash",
+      true,
     ),
     endpointCandidates: ["https://opencode.ai/zen/go"],
     icon: "opencode",
@@ -1171,10 +1180,14 @@ export const claudeDesktopProviderPresets: ClaudeDesktopProviderPreset[] = [
     baseUrl: "https://qianfan.baidubce.com/anthropic/tokenplan/personal",
     mode: "proxy",
     apiFormat: "anthropic",
+    // supports1m：DeepSeek V4 Pro 官方窗口 1M（千帆平台模型列表口径，
+    // 本仓 Codex catalog 同记 1048576）。[1m] 只是 Claude Desktop 本地
+    // 标记，匹配前会被剥掉，不会随请求发往上游
     modelRoutes: brandedRoutes(
       "deepseek-v4-pro",
       "deepseek-v4-pro",
       "deepseek-v4-pro",
+      true,
     ),
     endpointCandidates: [
       "https://qianfan.baidubce.com/anthropic/tokenplan/personal",