fix: resolve apiProxy via ctx.get for /model (v0.3.2)

Cordis throws on ctx.apiProxy without inject; use ctx.get and declare apiProxy inject so catalog and model APIs work under dsh web.

Co-authored-by: Cursor <cursoragent@cursor.com>

lib/commands.d.ts

@@ -15,7 +15,7 @@ export declare const MSG: {
     readonly STATUS_BOUND: (label: string) => string;
     readonly STATUS_BOUND_COLD: (label: string) => string;
     readonly GONE: "绑定的会话已不可用。请重新 /sessions。";
-    readonly MODEL_UNAVAILABLE: "无法读取模型列表（需要 dsh web / apiProxy）。请确认本机 Harness 已加载 host-apiproxy。";
+    readonly MODEL_UNAVAILABLE: (detail?: string) => string;
     readonly MODEL_UNROUTABLE: (current: string) => string;
     readonly MODEL_EMPTY: (current: string) => string;
     readonly MODEL_SET: (selected: string) => string;