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/components/providers/forms/ProviderForm.tsx

@@ -346,8 +346,11 @@ function ProviderFormFull({
   const {
     claudeModel,
     defaultHaikuModel,
+    defaultHaikuModelName,
     defaultSonnetModel,
+    defaultSonnetModelName,
     defaultOpusModel,
+    defaultOpusModelName,
     handleModelChange,
   } = useModelState({
     settingsConfig: form.getValues("settingsConfig"),
@@ -1815,8 +1818,11 @@ function ProviderFormFull({
               shouldShowModelSelector={category !== "official"}
               claudeModel={claudeModel}
               defaultHaikuModel={defaultHaikuModel}
+              defaultHaikuModelName={defaultHaikuModelName}
               defaultSonnetModel={defaultSonnetModel}
+              defaultSonnetModelName={defaultSonnetModelName}
               defaultOpusModel={defaultOpusModel}
+              defaultOpusModelName={defaultOpusModelName}
               onModelChange={handleModelChange}
               speedTestEndpoints={speedTestEndpoints}
               apiFormat={localApiFormat}