Launcher (#4)

* 激进的更新

* 试试

* fix.可爱的我一直在修CI（

* fix.启动器一定要能够启动

* feat.尝试弄了AOT的启动器。

* fix.修CI，好像是因为Linux那边有个问题，反正修就对了。

* fix.ci难修，为什么liunx跑不起来呢？

* Update build.yml

* Update LanMountainDesktop.csproj

* changed.调整了启动逻辑，优化了更新页面。

* changed.优化了更新体验

* feat.依旧试增量更新这一块，看看velopack

* fix.我们试验性地修复了启动器无法正常启动的问题，原因可能是这个画面没有启动，就GUI没显示。然后还把编译问题修了一下。

* fix.继续修ci，ci怎么天天炸

* changed.velopack，试试rust

* fix.修ci，修融合桌面，修启动器

* fix.GitHub Action工作流怎么天天出问题

* feat.引入velopack，不好，是rust（至少内存很安全了。

* chore: migrate release pipeline to signed filemap and wire rainyun s3

* fix: make optional s3 upload step workflow-parse safe

* fix: make delta pack generation robust for empty diffs and linux paths

* chore: rotate launcher update public key for pdc signing

* fix: restore stable launcher update public key

* fix: sync launcher public key with update signing secret

* fix: normalize PEM line endings in signing key validation

* fix: rotate launcher public key to match ci signing secret

* fix: compare signing keys by SPKI instead of PEM text

* refactor update backend to host-managed PDC pipeline

* fix release workflow env key collisions

* relax publish-pdc precheck to require S3 only

* set GH_TOKEN for PDCC installer step

* ci: add local pdc mock fallback for release publish

* ci: fix pdc mock process log redirection

* ci: fallback pdcc signing key to update private key

* ci: ensure pdcc signing passphrase env is always set

* ci: create pdcc publish root before invoking client

* ci: set pdcc version variable from release version

* ci: decouple pdcc installer version from publish config version

* ci: package pdcc subchannels with generated filemap and changelog

* ci: make local pdc mock diff return empty for fast fallback

* ci: fix pdcc variable mapping and pdc signing prechecks

* Update App.axaml.cs

* ci: wire aws cli credentials for rainyun s3

* ci: pin pdcc client version separately from app version

* ci: harden local pdc mock transport handling

* ci: publish pdcc subchannels in one pass

* ci: add pdcc publish heartbeat and timeout

* ci: fix pdcc publish workdir bootstrap

* feat.Penguin Logistics Online Network Distribution System

* ci: fix plonds s3 probe and signing fallback

* ci: validate signing key and quiet missing baselines

* ci: relax aws checksum mode for rainyun s3

* ci: avoid multipart uploads to rainyun s3

* ci: handle empty plonds baselines safely

* ci.plonds

* Rebuild release pipeline around PLONDS and DDSS

* Fix Windows installer script path in release workflow

docs/HOST_DISCOVERY.md

@@ -0,0 +1,78 @@
+# 主程序发现配置指南
+
+Launcher 支持灵活的主程序发现机制，可以通过多种方式配置主程序路径。
+
+## 发现优先级
+
+1. **环境变量** (`LMD_HOST_PATH`) - 最高优先级
+2. **配置文件** (`host-discovery.json`)
+3. **开发模式保存的路径** - 通过调试窗口选择
+4. **部署目录** (`app-*`)
+5. **开发路径** - 自动搜索解决方案中的 bin 目录
+6. **额外配置路径** - 自定义搜索路径
+7. **递归搜索** - 如果启用
+
+## 配置方式
+
+### 1. 环境变量
+
+设置 `LMD_HOST_PATH` 环境变量指向主程序可执行文件：
+
+```powershell
+$env:LMD_HOST_PATH = "C:\MyApp\LanMountainDesktop.exe"
+```
+
+### 2. 配置文件
+
+在应用根目录创建 `host-discovery.json`：
+
+```json
+{
+  "HostPath": "C:\\Custom\\Path\\LanMountainDesktop.exe",
+  "AdditionalPaths": [
+    "${AppRoot}/custom",
+    "${UserProfile}/dev/build",
+    "C:/Program Files/LanMountainDesktop/*"
+  ]
+}
+```
+
+### 3. 开发模式
+
+在错误窗口中按 `Ctrl+Shift+D` 打开调试窗口，启用开发模式并选择自定义路径。路径会自动保存，下次启动时优先使用。
+
+## 路径变量
+
+配置文件支持以下变量：
+
+- `${AppRoot}` - 应用根目录
+- `${BaseDirectory}` - Launcher 所在目录
+- `${UserProfile}` - 用户主目录
+- `${LocalAppData}` - 本地应用数据目录
+
+## 通配符支持
+
+`AdditionalPaths` 支持通配符：
+
+```json
+{
+  "AdditionalPaths": [
+    "C:/Builds/*/LanMountainDesktop.exe",
+    "${AppRoot}/versions/*/app.exe"
+  ]
+}
+```
+
+## 递归搜索
+
+启用递归搜索可以自动在子目录中查找主程序：
+
+```csharp
+var options = new HostDiscoveryOptions
+{
+    RecursiveSearch = true,
+    MaxRecursionDepth = 3
+};
+```
+
+注意：递归搜索可能影响启动性能，建议仅在必要时启用。