fix(docs): M118 r1 —— release notes / NOTICE 停止自称 Slint 版，packaging README 补两处旧口径限定语

复审 r1 的两条 P2，都只动文档（`packaging/release-notes.md`、`NOTICE`、`packaging/README.md`）。

P2-1（发版阻断项）：`packaging/release-notes.md` 是 Release body 模板，`NOTICE` 装在每个 tar.gz 里，
两者都仍自称 Slint 版：
- release notes：首段 `Slint + Metro UI` → `iced 0.14 + Material 3 Expressive UI`；「No GPU」小节从
  femtovg / `SLINT_BACKEND=winit-software` 改成 wgpu + tiny-skia / `ICED_BACKEND=tiny-skia`；
  删掉页面的 `Made with Slint` 徽章声明，换成「本版所有资产都由 iced 构建、不含 Slint 代码；
  Slint 版源码仅作历史参考、不构建不发布；RF-2.0 徽章义务跟着链接 Slint 的二进制走，本版没有」。
- NOTICE：第 1 条标题改「Slint —— 历史源码，不随任何产物分发」，正文明确「当前 GUI 框架是 iced、
  二进制不含 Slint 代码；crates/app 已被 workspace exclude，不参与构建/测试/发布」；RF-2.0 义务改成
  「对当前产物不适用，仍挂在 v0.1.0 那批已发布资产上」。**没有整条删除**：仓库里确实还有基于 Slint
  写的历史源码，且将来若重新链接 Slint 义务要恢复，留记录比删掉更安全——依据写进报告。
  另在第 3 条补一句「当前 GUI 框架：iced 0.14（MIT）+ winit / wgpu / tiny-skia」。

P2-2：`packaging/README.md`（净零行，仍 399 ≤400）
- §4 的 `libGL/libEGL` 说明从 femtovg 改成 wgpu 的 GL/EGL 后端 + tiny-skia 软渲染，并加一段
  「M118 口径」：那张表与 DT_NEEDED 结论是 Slint 版实测，iced 版**尚未重测**，按「同一族库、细节待验」读。
- §11 的本地复跑命令补限定语：`linux-smoke-docker.sh` 仍编/跑 Slint 版 bin，现在会失败；在它换成
  `unlucky-launcher-iced` 之前，本地照 ci.yml 的 runtime-smoke 三步手跑。段落未删。

证据：`git diff --name-only` 仅这三份；release-notes 的 `{{VERSION}}`(15) / `{{SUMS}}`(1) 占位符仍在，
模板渲染走查通过；`packaging/README.md` 399 行（守卫上限 400）。另按复审要求二次单跑
`cargo test -p unlucky-core --test launch pipeline_records_crash_report_artifact` → ok（0.16s）。

packaging/release-notes.md

@@ -1,6 +1,6 @@
 # Unlucky Launcher {{VERSION}}
 
-Rust-native **single-file** Minecraft launcher: Slint + Metro UI, built-in AI agent
+Rust-native **single-file** Minecraft launcher: iced 0.14 + Material 3 Expressive UI, built-in AI agent
 (chat / config edits / crash diagnosis) and an MCP server other agent tools can attach to.
 No WebView, no bundled runtime, no JRE download needed to start the launcher itself.
 
@@ -75,11 +75,11 @@ chmod +x unlucky-launcher && ./unlucky-launcher
 
 ## No GPU? Software renderer
 
-The UI prefers OpenGL (femtovg) and falls back to Slint's CPU renderer when no usable GL
-driver is present. Force it on any machine with:
+The UI renders through `wgpu` (GPU) and falls back to the `tiny-skia` CPU rasteriser when no usable
+adapter is present. Force the CPU path on any machine with:
 
 ```bash
-unlucky-launcher --software-renderer          # or: SLINT_BACKEND=winit-software unlucky-launcher
+unlucky-launcher --software-renderer          # or: ICED_BACKEND=tiny-skia unlucky-launcher
 ```
 
 ## Verify the download
@@ -109,7 +109,15 @@ Get-FileHash .\unlucky-launcher-{{VERSION}}-windows-x64.exe -Algorithm SHA256
 
 ## License
 
-Apache-2.0. Third-party notices (including Slint's Royalty-Free 2.0 track) are in `NOTICE`.
-Unlucky Launcher is not affiliated with Mojang or Microsoft; it does not ship game files.
+Apache-2.0. Third-party notices are in `NOTICE`. Unlucky Launcher is not affiliated with Mojang or
+Microsoft; it does not ship game files.
 
-Made with [Slint](https://slint.dev) — Slint Royalty-Free 2.0 track, unmodified.
+## UI framework in this build
+
+Every asset in this release is built from the iced UI (`crates/app-iced`, iced 0.14, MIT) — no Slint
+code is linked into it. The earlier Slint UI (`crates/app`) stays in the repository as historical
+source only: excluded from the cargo workspace, not built, not part of any asset here and not part of
+the release matrix. It did ship in the previous `v0.1.0` release; that release's Slint Royalty-Free
+2.0 attribution remains where it was published, and no asset in this build carries that obligation.
+There is deliberately no "Made with Slint" badge on this page: the obligation follows a Slint-linked
+binary, and this release has none.