W21: anthropic Stream+Tools + --prompt batch + sanitizer fix + plugin unit tests (W21.1-W21.6)

- W21.1: ci-sanitize preset 独立 Linux-clang + ci-threadsan (TSan)
- W21.2: anthropic tool_use content_block 解析 + configure 缓存 tools_json
- W21.3: --prompt 非交互批处理模式
- W21.4: session auto-save 失败告警 + 当前目录 fallback
- W21.5: smoke 补 tool_calls 边界用例 4 块 12 断言
- W21.6: anthropic 11 块 78 CHECK + deepseek 12 块 78 CHECK

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

dstalk-cli/src/main.cpp

@@ -401,11 +401,14 @@ int main(int argc, char* argv[])
     bool pipe_mode = (isatty(fileno(stdin)) == 0);
 #endif
     bool batch_mode = false;
+    const char* prompt_arg = nullptr;
     if (!pipe_mode) {
         for (int i = 1; i < argc; ++i) {
             if (std::strcmp(argv[i], "--batch") == 0) {
                 batch_mode = true;
-                break;
+            } else if (std::strcmp(argv[i], "--prompt") == 0 && i + 1 < argc && argv[i+1][0] != '-') {
+                prompt_arg = argv[++i];
+                batch_mode = true;
             }
         }
     }
@@ -421,12 +424,13 @@ int main(int argc, char* argv[])
     // 查找配置文件
     const char* config_path = nullptr;
     if (argc >= 2) {
-        // 跳过 --batch 标志
+        // 跳过 --batch / --prompt 标志
         for (int i = 1; i < argc; ++i) {
-            if (std::strcmp(argv[i], "--batch") != 0) {
+            if (std::strcmp(argv[i], "--batch") != 0 && std::strcmp(argv[i], "--prompt") != 0) {
                 config_path = argv[i];
                 break;
             }
+            if (std::strcmp(argv[i], "--prompt") == 0 && i + 1 < argc) ++i;
         }
     }
     if (!config_path) {
@@ -518,6 +522,35 @@ int main(int argc, char* argv[])
         }
     }
 
+    // ---- --prompt 批处理模式 (非交互) ----
+    if (prompt_arg) {
+        if (prompt_arg[0] == '\0') {
+            std::fprintf(stderr, "empty prompt\n");
+            dstalk_shutdown();
+            return EXIT_FATAL;
+        }
+        if (!g_ai || !g_session) {
+            std::fprintf(stderr, CLR_RED "[ERROR] AI or session service unavailable\n" CLR_RESET);
+            dstalk_shutdown();
+            return EXIT_CONFIG;
+        }
+        int history_count = 0;
+        const dstalk_message_t* history = g_session->history(&history_count);
+        dstalk_chat_result_t result = g_ai->chat(history, history_count, prompt_arg, nullptr);
+        if (result.ok) {
+            std::printf("%s\n", result.content ? result.content : "");
+            g_ai->free_result(&result);
+            dstalk_shutdown();
+            return EXIT_OK;
+        } else {
+            std::fprintf(stderr, CLR_RED "[ERROR] AI error: %s\n" CLR_RESET,
+                        result.error ? result.error : "unknown");
+            g_ai->free_result(&result);
+            dstalk_shutdown();
+            return EXIT_FATAL;
+        }
+    }
+
     char buffer[8192];
     while (true) {
         // B1: 检查退出标志