feat(app): GUI 接上 Forge/NeoForge installer processors（M45）

- host/install_processors：GUI 与 CLI 同序跑 processors（计划 → 依赖库 → 选 Java → 串行 java -cp），进度经 HostTask::Install 回流（阶段文案 + 每步处理器名 + 文件/字节/速度/ETA），取消在阶段边界生效； - host/install_journal：安装过程追加到 .ULL/logs/install.log，失败文案带日志路径，不再静默失败； - host/install.rs：supported() 扩到原版 + Fabric/Quilt/Forge/NeoForge，删除 Forge/NeoForge 拒装路径（仅剩 OptiFine/LiteLoader 两家 core 侧无管线者），spawn_install 统一持 Job 上下文； - 失败诊断：缺 Java / processor 非零退出（保留 processor_* 大类码与脱敏 stderr 尾部）/ 依赖库下漏 / 元数据缺失，均为结构化文案 + Toast + 装日志； - dto::InstallStage::Installing 文案改「生成版本」（同时覆盖写版本 JSON 与跑 installer 两段）； - screenshot：新增 --screenshot-loader，Forge/NeoForge 中间态可离屏取图； - 测试 +14（138 全绿）：supported() 语义、处理器阶段注入 fake 后端覆盖跳过/缺 Java/非零退出/ 依赖库失败/命令行构造/进度文案，另修旧用例（Forge 不再被门禁拒装）。
2026-11-01 09:14:01 +08:00
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commit b0f747074f
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+//! installer processors 段的单测夹具（拆文件守 400 行上限）。
+//!
+//! 不需要网络、不需要 JDK、不真的起 java：`Harness` 给一个临时数据根 + 进度通道，
+//! `Fake` 回放预置的下载/Java/执行结果并记录被调顺序与组出来的命令行。
+
+use std::cell::RefCell;
+use std::path::{Path, PathBuf};
+use std::sync::atomic::{AtomicBool, AtomicUsize, Ordering};
+use std::sync::mpsc::Receiver;
+use std::sync::{Arc, Mutex};
+
+use unlucky_core::addon::loader::forge::{InstallProfile, Processor};
+use unlucky_core::addon::loader::processors::{
+    ProcessorError, ProcessorPlan, ProcessorRun, StepOutcome, StepSink, StepStatus,
+};
+use unlucky_core::addon::loader::LoaderKind as CoreLoaderKind;
+use unlucky_core::download::{DownloadEngine, DownloadErrorKind};
+use unlucky_core::game::install::{
+    FileFailure, FileOutcome, FileStatus, InstallReport, PlanFile, ProgressSink,
+};
+use unlucky_core::game::java::{JavaOrigin, JavaRequirement, JavaRuntime};
+
+use super::{Backend, Reporter, StageInput};
+use crate::dto::{CreateRequest, LoaderKind};
+use crate::host::env::HostEnv;
+use crate::host::install_journal::Journal;
+use crate::host::job::{channel, HostTask, JobSender};
+use crate::host::meter::Meter;
+
+static SEQ: AtomicUsize = AtomicUsize::new(0);
+
+/// 一段 cases 的公共环境：临时数据根 + 引擎 + 进度通道。
+pub(super) struct Harness {
+    dir: PathBuf,
+    pub(super) env: HostEnv,
+    pub(super) engine: DownloadEngine,
+    tx: JobSender,
+    rx: Receiver<HostTask>,
+    pub(super) meter: Arc<Mutex<Meter>>,
+    pub(super) journal: Journal,
+    pub(super) cancel: Arc<AtomicBool>,
+}
+
+impl Harness {
+    pub(super) fn new() -> Self {
+        let seq = SEQ.fetch_add(1, Ordering::SeqCst);
+        let dir = std::env::temp_dir().join(format!("ull-proc-{}-{seq}", std::process::id()));
+        let _ = std::fs::remove_dir_all(&dir);
+        let env = HostEnv::at_root(&dir);
+        let engine = crate::host::engine::engine(&env);
+        let request = CreateRequest {
+            version: "1.20.1".to_string(),
+            loader: LoaderKind::Forge,
+            loader_version: "47.2.0".to_string(),
+            name: "proc".to_string(),
+        };
+        let (tx, rx) = channel();
+        Self {
+            journal: Journal::open(&env),
+            meter: Arc::new(Mutex::new(Meter::new(&request))),
+            cancel: Arc::new(AtomicBool::new(false)),
+            dir,
+            env,
+            engine,
+            tx,
+            rx,
+        }
+    }
+
+    pub(super) fn reporter(&self) -> Reporter<'_> {
+        Reporter {
+            tx: &self.tx,
+            meter: &self.meter,
+            journal: &self.journal,
+        }
+    }
+
+    /// 进度面板收到的所有文案。
+    pub(super) fn messages(&self) -> Vec<String> {
+        self.rx
+            .try_iter()
+            .filter_map(|task| match task {
+                HostTask::Install(progress) => Some(progress.message.clone()),
+                _ => None,
+            })
+            .collect()
+    }
+
+    /// 装日志全文。
+    pub(super) fn log(&self) -> String {
+        std::fs::read_to_string(self.journal.path()).unwrap_or_default()
+    }
+}
+
+impl Drop for Harness {
+    fn drop(&mut self) {
+        std::fs::remove_dir_all(&self.dir).ok();
+    }
+}
+
+/// 注入用的假后端：回放预置结果 + 记录调用顺序与被组出来的命令行。
+pub(super) struct Fake {
+    pub(super) libraries_ok: bool,
+    pub(super) java: Option<JavaRuntime>,
+    pub(super) run_error: Option<ProcessorError>,
+    calls: RefCell<Vec<&'static str>>,
+    steps: RefCell<Vec<(usize, String, Vec<String>, usize)>>,
+}
+
+impl Fake {
+    pub(super) fn new() -> Self {
+        Self {
+            libraries_ok: true,
+            java: Some(java()),
+            run_error: None,
+            calls: RefCell::new(Vec::new()),
+            steps: RefCell::new(Vec::new()),
+        }
+    }
+
+    pub(super) fn calls(&self) -> Vec<&'static str> {
+        self.calls.borrow().clone()
+    }
+
+    /// 被组出来的每步（序号 / 坐标 / 参数 / classpath 条数）。
+    pub(super) fn steps(&self) -> Vec<(usize, String, Vec<String>, usize)> {
+        self.steps.borrow().clone()
+    }
+}
+
+impl Backend for Fake {
+    fn download_libraries(
+        &self,
+        _engine: &DownloadEngine,
+        files: &[PlanFile],
+        _sink: Option<ProgressSink>,
+    ) -> InstallReport {
+        self.calls.borrow_mut().push("libraries");
+        let ok = self.libraries_ok;
+        let outcomes = files
+            .iter()
+            .map(|file| FileOutcome {
+                role: file.role,
+                name: file.name.clone(),
+                dest: file.dest.clone(),
+                status: if ok {
+                    FileStatus::Skipped
+                } else {
+                    FileStatus::Failed
+                },
+                bytes: 0,
+                source: None,
+                failure: (!ok).then(|| FileFailure {
+                    kind: DownloadErrorKind::Network,
+                    message: "连接超时".to_string(),
+                }),
+            })
+            .collect();
+        InstallReport {
+            files: outcomes,
+            version_json: None,
+            warnings: Vec::new(),
+        }
+    }
+
+    fn select_java(&self, _managed: &Path, _requirement: &JavaRequirement) -> Option<JavaRuntime> {
+        self.calls.borrow_mut().push("java");
+        self.java.clone()
+    }
+
+    fn run(
+        &self,
+        plan: &ProcessorPlan,
+        java: &JavaRuntime,
+        sink: Option<StepSink>,
+    ) -> Result<ProcessorRun, ProcessorError> {
+        self.calls.borrow_mut().push("run");
+        *self.steps.borrow_mut() = plan
+            .steps
+            .iter()
+            .map(|step| {
+                (
+                    step.index,
+                    step.label.clone(),
+                    step.args.clone(),
+                    step.classpath.len(),
+                )
+            })
+            .collect();
+        if let Some(error) = &self.run_error {
+            return Err(error.clone());
+        }
+        let outcomes: Vec<StepOutcome> = plan
+            .steps
+            .iter()
+            .map(|step| StepOutcome {
+                index: step.index,
+                label: step.label.clone(),
+                status: StepStatus::Executed,
+                outputs: step.outputs.len(),
+                elapsed_ms: 12,
+                stdout_tail: None,
+                stderr_tail: None,
+            })
+            .collect();
+        if let Some(sink) = &sink {
+            for outcome in &outcomes {
+                sink(outcome);
+            }
+        }
+        Ok(ProcessorRun {
+            java: java.clone(),
+            steps: outcomes,
+            warnings: Vec::new(),
+        })
+    }
+}
+
+/// 一个主版本已知的假 Java。
+pub(super) fn java() -> JavaRuntime {
+    JavaRuntime {
+        binary: PathBuf::from("java"),
+        origin: JavaOrigin::Managed,
+        version: Some("21.0.4".to_string()),
+        major: Some(21),
+        bits: 64,
+        vendor: Some("temurin".to_string()),
+    }
+}
+
+/// 一个最小可用的 install profile：一个 client 侧 processor、两个字面量参数。
+pub(super) fn profile() -> InstallProfile {
+    let mut profile = InstallProfile::default();
+    profile.processors.push(Processor {
+        sides: vec!["client".to_string()],
+        jar: Some("net.minecraftforge:installertools:1.3.0".to_string()),
+        classpath: vec!["net.minecraftforge:jarsplitter:1.1.4".to_string()],
+        args: vec!["--task".to_string(), "'MCP_DATA'".to_string()],
+        ..Processor::default()
+    });
+    profile
+}
+
+pub(super) fn input<'a>(profile: &'a InstallProfile, installer: &'a Path) -> StageInput<'a> {
+    StageInput {
+        kind: CoreLoaderKind::Forge,
+        mc_version: "1.20.1",
+        version_id: "1.20.1-forge-47.2.0",
+        profile: Some(profile),
+        installer: Some(installer),
+        installed: false,
+    }
+}
+
+pub(super) fn installer() -> PathBuf {
+    PathBuf::from("cache/meta/forge-installer.jar")
+}
+
+pub(super) fn outcome(status: StepStatus) -> StepOutcome {
+    StepOutcome {
+        index: 3,
+        label: "net.minecraftforge:installertools:1.3.0".to_string(),
+        status,
+        outputs: 2,
+        elapsed_ms: 1234,
+        stdout_tail: None,
+        stderr_tail: None,
+    }
+}