feat(presenter): M103 AI 助手栏视图模型与事件投影

- 新增 crates/presenter/src/agent.rs（Presenter 门面：agent_rail / agent_submit / agent_mark_read / agent_confirm + AgentTransport 端口 + 裁决审计镜像） - 新增 agent/rail.rs：AgentRail（messages / unread / busy / draft / confirm / streaming / yolo / endpoint_label / error），四类 AgentEvent 的投影与唯一脱敏闸门 - 新增 agent/mock.rs：脚本化后端（正常问答 / 流式中途出错 / 需确认的写操作） - dto/agent.rs：ConfirmRequest / Sensitivity + AgentEvent::{Failed, ConfirmRequested, ConfirmResolved}；AgentEvent 去掉 Eq（details 含 serde_json::Value） - state.rs：AiSession 迁成 AgentRail，apply_agent 走 rail.ingest + 未读规则（可见性 = 独立页或栏展开）；navigate/toggle_ai 展开时清未读 - 测试：agent/tests.rs 14 条（四条路径 + JWT 红线 + YOLO 语义 + 提交前置条件）， state_tests.rs 补 4 条（Failed / ConfirmRequested / 未读可见性 / 用户消息不计未读） - 两行声明补进 lib.rs（pub mod agent）与 dto/mod.rs（重导出 ConfirmRequest/Sensitivity）
2026-11-04 00:21:19 +08:00
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+//! `agent` 模块的单元测试：四条路径（正常问答 / 流式中途出错 / 需确认的写操作 / 未读计数）+
+//! 红线（凭据形状的串不得进 rail）+ YOLO 语义 + 提交前置条件。
+//!
+//! 断言口径照 M103 的要求写清「抓得住什么 / 抓不住什么」：这些测试盯的是**投影与裁决**，
+//! 不盯真实模型的措辞、真实时序与网络错误——那些要接 rig 之后跑回放回归。
+
+use super::mock::{MockAgentTransport, Script};
+use super::{AgentTransport, ConfirmVerdict, Presenter};
+use crate::agent::rail::scrub_text;
+use crate::agent::AgentRail;
+use crate::dto::{AgentEvent, AppEvent, ChatMessage, ChatRole, ConfirmRequest, Sensitivity};
+
+/// 真实形状的 JWT（header.payload.signature，三段各 ≥8）。
+const JWT: &str = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIxMjM0NTY3ODkwIn0.c2lnbmF0dXJlLXZhbHVlLXRoYXQtaXMtbG9uZy1lbm91Z2g";
+
+fn presenter(script: Script) -> Presenter {
+    Presenter::new(Box::new(MockAgentTransport::new(script)))
+}
+
+// ───────────────────────── 路径 1：正常问答 ─────────────────────────
+
+#[test]
+fn normal_answer_accumulates_into_one_assistant_message() {
+    let mut presenter = presenter(Script::Qa);
+    assert!(presenter.agent_submit("怎么装 1.20.4".to_string()).is_ok());
+
+    let rail = presenter.agent_rail();
+    // 抓得住：用户气泡 + 一条助手消息（增量累积在同一条上，不是一个字一个气泡）
+    assert_eq!(rail.messages.len(), 2);
+    assert_eq!(rail.messages[0].role, ChatRole::User);
+    assert_eq!(rail.messages[0].text, "怎么装 1.20.4");
+    assert_eq!(rail.messages[1].role, ChatRole::Assistant);
+    assert_eq!(
+        rail.messages[1].text,
+        "先确认版本：官方 1.20.4 是正式版，装完再加 Fabric。"
+    );
+    assert!(!rail.messages[1].streaming);
+    assert!(!rail.streaming);
+    assert!(!rail.busy);
+    assert!(rail.confirm.is_none());
+    assert!(rail.error.is_none());
+    // 抓不住：不校验助手措辞是否正确（那是工具/模型的事）
+}
+
+// ─────────────────── 路径 2：流式中途出错 ───────────────────
+
+#[test]
+fn mid_stream_error_keeps_partial_text_and_flags_the_turn() {
+    let mut presenter = presenter(Script::FailsMidStream);
+    assert!(presenter.agent_submit("日志里有错吗".to_string()).is_ok());
+
+    let rail = presenter.agent_rail();
+    // 抓得住：已到的增量不丢、流式收敛（不会永远转圈）、错误进横幅也进会话历史
+    assert_eq!(rail.messages[1].role, ChatRole::Assistant);
+    assert_eq!(rail.messages[1].text, "我先读一下最近的日志");
+    assert!(!rail.streaming);
+    assert!(!rail.busy, "出错后输入框必须重新可用");
+    assert_eq!(rail.error.as_deref(), Some("provider 断流：read timeout"));
+    assert_eq!(rail.messages[2].role, ChatRole::System);
+    assert_eq!(rail.messages[2].text, "provider 断流：read timeout");
+    // 抓不住：不判断这是网络问题还是模型问题（归因在 core::diagnose）
+}
+
+// ───────────── 路径 3a/3b：需确认的写操作（接受 / 拒绝）─────────────
+
+#[test]
+fn write_op_accept_applies_and_audits() {
+    let mut presenter = presenter(Script::WriteOp);
+    assert!(presenter.agent_submit("并发调小点".to_string()).is_ok());
+
+    // 确认之前：rail 挂着请求，且 UI 靠 busy 禁用输入
+    {
+        let rail = presenter.agent_rail();
+        assert!(rail.busy);
+        let request = rail.confirm.as_ref().expect("应当有待确认请求");
+        assert_eq!(request.tool, "set_config");
+        assert_eq!(request.details["path"], "download.concurrency");
+        assert!(request.sensitivity.needs_confirm());
+        assert_eq!(rail.messages.len(), 3); // user / assistant / tool
+        assert_eq!(rail.messages[2].role, ChatRole::Tool);
+    }
+
+    presenter.agent_confirm(true);
+    let rail = presenter.agent_rail();
+    assert!(rail.confirm.is_none());
+    assert!(!rail.busy);
+    assert_eq!(rail.messages[2].text, "已写入 download.concurrency = 16");
+    assert!(rail.messages[2].tool.as_ref().is_some_and(|tool| tool.ok));
+    assert_eq!(
+        rail.messages.last().map(|message| message.role),
+        Some(ChatRole::Assistant)
+    );
+
+    let audit = presenter.audit();
+    assert_eq!(audit.len(), 1);
+    assert_eq!(audit[0].verdict, ConfirmVerdict::Approved);
+    assert!(!audit[0].yolo && audit[0].confirmed, "用户亲手点的允许");
+    assert_eq!(audit[0].sensitivity, Sensitivity::High);
+}
+
+#[test]
+fn write_op_reject_denies_and_audits() {
+    let mut presenter = presenter(Script::WriteOp);
+    assert!(presenter.agent_submit("并发调小点".to_string()).is_ok());
+    presenter.agent_confirm(false);
+
+    let rail = presenter.agent_rail();
+    assert!(rail.confirm.is_none());
+    assert!(!rail.busy);
+    assert_eq!(rail.messages[2].text, "用户拒绝，未写入");
+    assert!(rail.messages[2].tool.as_ref().is_some_and(|tool| !tool.ok));
+    assert_eq!(
+        rail.messages.last().map(|text| text.text.clone()),
+        Some("那就不改了。".to_string())
+    );
+
+    let audit = presenter.audit();
+    assert_eq!(audit[0].verdict, ConfirmVerdict::Denied);
+    assert!(!audit[0].yolo && audit[0].confirmed);
+}
+
+// ─────────────────────── 路径 4：未读计数 ───────────────────────
+
+#[test]
+fn unread_grows_while_collapsed_and_mark_read_clears() {
+    let mut presenter = presenter(Script::WriteOp);
+    presenter.state_mut().prefs.ai_collapsed = true; // 收成 icon 轨 = 用户离开了栏
+    presenter
+        .agent_submit("并发调小点".to_string())
+        .expect("提交应当成功");
+
+    // 抓得住：助手消息 + 工具条目 + 待确认各算一条；用户自己的话与纯增量不算
+    assert_eq!(presenter.agent_rail().unread, 3);
+
+    presenter.agent_confirm(true);
+    // 工具收尾不是新内容，收尾的助手消息算一条
+    assert_eq!(presenter.agent_rail().unread, 4);
+
+    presenter.agent_mark_read();
+    assert_eq!(presenter.agent_rail().unread, 0);
+}
+
+// ───────────────────────── YOLO 语义 ─────────────────────────
+
+#[test]
+fn yolo_auto_accepts_but_still_records_the_verdict() {
+    let mut presenter = presenter(Script::WriteOp);
+    presenter.state_mut().ai.yolo = true;
+    presenter
+        .agent_submit("并发调小点".to_string())
+        .expect("提交应当成功");
+
+    // 用户点了「拒绝」，但 YOLO 下自动放行
+    presenter.agent_confirm(false);
+
+    let rail = presenter.agent_rail();
+    assert!(rail.confirm.is_none());
+    assert_eq!(rail.messages[2].text, "已写入 download.concurrency = 16");
+
+    // 不得静默跳过：审计里必须有这一条，且两种标记分开记
+    let audit = presenter.audit();
+    assert_eq!(audit.len(), 1);
+    assert_eq!(audit[0].verdict, ConfirmVerdict::Approved);
+    assert!(audit[0].yolo, "YOLO 自动放行要留痕");
+    assert!(!audit[0].confirmed, "自动放行不是「用户确认」");
+}
+
+#[test]
+fn pending_confirm_forces_busy_without_yolo() {
+    let mut presenter = presenter(Script::WriteOp);
+    assert!(!presenter.agent_rail().yolo);
+    presenter
+        .agent_submit("并发调小点".to_string())
+        .expect("提交应当成功");
+
+    let rail = presenter.agent_rail();
+    assert!(rail.confirm.is_some());
+    assert!(rail.busy, "非 YOLO 下待确认必须算忙，UI 靠它禁用输入");
+}
+
+// ───────────────────── 红线：凭据形状的串 ─────────────────────
+
+#[test]
+fn jwt_shaped_text_never_reaches_the_rail() {
+    let mut presenter = presenter(Script::Qa);
+    // 五个入口各注入一次：用户提交、增量、工具摘要、错误、确认请求细节
+    presenter
+        .agent_submit(format!("我的 token 是 {JWT}"))
+        .expect("提交应当成功");
+    presenter.apply(AppEvent::Agent(AgentEvent::MessageDelta {
+        index: 1,
+        delta: format!("顺手贴一个 {JWT}"),
+    }));
+    presenter.apply(AppEvent::Agent(AgentEvent::ToolCallStarted {
+        name: "read_game_log".to_string(),
+        summary: format!("Authorization: Bearer {JWT}"),
+    }));
+    presenter.apply(AppEvent::Agent(AgentEvent::Failed {
+        message: format!("401: access_token={JWT}"),
+    }));
+    presenter.apply(AppEvent::Agent(AgentEvent::ConfirmRequested {
+        request: ConfirmRequest {
+            id: "req-jwt".to_string(),
+            tool: "set_config".to_string(),
+            summary: format!("把 access_token 改成 {JWT}"),
+            details: serde_json::json!({ "access_token": JWT, "note": JWT }),
+            sensitivity: Sensitivity::High,
+        },
+    }));
+
+    let rail = presenter.agent_rail();
+    let text = rail_text(rail);
+    assert!(
+        !text.contains("eyJhbGci"),
+        "rail 上不得出现 JWT 原文：{text}"
+    );
+    assert!(
+        text.contains("<redacted:token>"),
+        "应当被脱敏成占位符：{text}"
+    );
+    // 凭据键名的值整段打码（不只是靠内容规则）
+    let details = &rail.confirm.as_ref().expect("确认请求仍在").details;
+    assert_eq!(details["access_token"], "<redacted:token>");
+    assert!(!details["note"]
+        .as_str()
+        .unwrap_or_default()
+        .contains("eyJhbGci"));
+}
+
+#[test]
+fn scrub_text_is_idempotent_on_already_redacted_text() {
+    let once = scrub_text(JWT);
+    assert_eq!(scrub_text(&once), once);
+}
+
+// ─────────────────────── 提交前置条件 ───────────────────────
+
+#[test]
+fn submit_rejects_empty_busy_and_pending_confirm() {
+    let mut presenter = presenter(Script::Qa);
+    assert!(presenter.agent_submit("   \n ".to_string()).is_err());
+    assert!(presenter.agent_rail().messages.is_empty());
+
+    // 上一轮还在跑
+    presenter.apply(AppEvent::Agent(AgentEvent::MessageAppended(
+        ChatMessage::assistant_stream(),
+    )));
+    assert!(presenter.agent_submit("再说一句".to_string()).is_err());
+
+    // 有写操作待确认
+    presenter.apply(AppEvent::Agent(AgentEvent::Failed {
+        message: "断流".to_string(),
+    }));
+    presenter.apply(AppEvent::Agent(AgentEvent::ConfirmRequested {
+        request: ConfirmRequest {
+            id: "req-1".to_string(),
+            tool: "set_config".to_string(),
+            summary: "改内存".to_string(),
+            details: serde_json::json!({}),
+            sensitivity: Sensitivity::High,
+        },
+    }));
+    let error = presenter.agent_submit("再说一句".to_string());
+    assert!(error.is_err(), "待确认时不许再提交");
+}
+
+#[test]
+fn submit_keeps_the_draft_when_the_backend_fails() {
+    let mut presenter = Presenter::new(Box::new(BrokenTransport));
+    presenter.state_mut().ai.draft = "还没发出去的话".to_string();
+    assert!(presenter
+        .agent_submit("还没发出去的话".to_string())
+        .is_err());
+    // 抓得住：起不来的一轮不产生事件、草稿保留（用户能改完再发）
+    assert!(presenter.agent_rail().messages.is_empty());
+    assert_eq!(presenter.agent_rail().draft, "还没发出去的话");
+}
+
+#[test]
+fn draft_is_cleared_only_on_successful_submit() {
+    let mut presenter = presenter(Script::Qa);
+    presenter.state_mut().ai.draft = " 怎么装 ".to_string();
+    presenter
+        .agent_submit(" 怎么装 ".to_string())
+        .expect("提交应当成功");
+    assert!(presenter.agent_rail().draft.is_empty());
+}
+
+#[test]
+fn confirm_without_pending_is_a_noop() {
+    let mut presenter = presenter(Script::Qa);
+    presenter.agent_confirm(true);
+    presenter.agent_confirm(false);
+    assert!(presenter.audit().is_empty());
+    assert!(presenter.agent_rail().messages.is_empty());
+}
+
+#[test]
+fn apply_forwards_every_event_to_app_state() {
+    let mut presenter = presenter(Script::Qa);
+    presenter.apply(AppEvent::Agent(AgentEvent::MessageAppended(
+        ChatMessage::assistant_stream(),
+    )));
+    assert_eq!(presenter.state().ai.messages.len(), 1);
+    assert_eq!(presenter.agent_rail(), &presenter.state().ai);
+}
+
+// ───────────────────────── 测试替身 ─────────────────────────
+
+/// 起不来的后端（返回 `Err`，不产生任何事件）。
+struct BrokenTransport;
+
+impl AgentTransport for BrokenTransport {
+    fn submit(&mut self, _text: &str, _history: &AgentRail) -> Result<Vec<AppEvent>, String> {
+        Err("本地模型还没加载".to_string())
+    }
+
+    fn confirm(&mut self, _request_id: &str, _accept: bool) -> Vec<AppEvent> {
+        Vec::new()
+    }
+}
+
+/// 把 rail 上所有对用户可见的文本拼起来（红线断言用）。
+fn rail_text(rail: &AgentRail) -> String {
+    let mut out = String::new();
+    for message in &rail.messages {
+        out.push_str(&message.text);
+        if let Some(tool) = &message.tool {
+            out.push_str(&tool.name);
+            out.push_str(&tool.summary);
+        }
+    }
+    out.push_str(rail.error.as_deref().unwrap_or_default());
+    out.push_str(&rail.endpoint_label);
+    if let Some(confirm) = &rail.confirm {
+        out.push_str(&confirm.tool);
+        out.push_str(&confirm.summary);
+        out.push_str(&confirm.details.to_string());
+    }
+    out
+}