me-web? skeleton: Avalonia 12 app, server, packaging and CI

The first screen (online or not, a Check button, every language with a
draft notice), the desktop and Android heads, the server's /api/info and
/api/ip, a release tool that builds deb, rpm, a Windows exe, macOS zips,
a signed APK and the server, and the Gitea workflows that run it. Rules
adapted from passolo; AGPL-3.0.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_012CzABvBkbcFqoHdmi8b9WB

CLAUDE.md

@@ -0,0 +1,49 @@
+# CLAUDE.md — MeWeb quick reference
+
+Read `AGENT.md` first and cite `PATTERNS.md` for code rules. This file holds commands, the map and the pitfalls.
+
+## Commands
+
+```bash
+dotnet build src/MeWeb.Desktop/MeWeb.Desktop.csproj
+dotnet run --project src/MeWeb.Desktop
+dotnet run --project src/MeWeb.Server                     # ASPNETCORE_URLS=http://127.0.0.1:5481
+dotnet run tools/setup.cs -- --group jdk                   # pinned JDK 21 into tools/jdk
+dotnet run tools/setup.cs -- --group packaging             # pinned nfpm into tools/packaging
+dotnet build src/MeWeb.Android/MeWeb.Android.csproj \
+  -p:JavaSdkDirectory=$PWD/tools/jdk/linux-x64/jdk-21.0.12+8 -p:AndroidSdkDirectory=$HOME/Android/Sdk
+dotnet run --project tools/Screenshots -- dist/screenshots [en,it,...]
+dotnet publish src/MeWeb.Desktop -c Release -r win-x64 --self-contained -p:PublishSingleFile=true \
+  -p:IncludeNativeLibrariesForSelfExtract=true -p:EnableCompressionInSingleFile=true
+dotnet publish src/MeWeb.Desktop -c Release -r osx-arm64 --self-contained
+```
+
+The Android workload installs into the user SDK (`dotnet workload install android`); the system SDK in `/opt/dotnet`
+is root-owned, so CI uses the runner user's own `~/.dotnet` (passolo's `tools/release.sh` pattern).
+
+## Map
+
+| Path | What |
+|---|---|
+| `src/MeWeb.Shared` | `Endpoints.cs` (routes and hosts), wire contracts, `MeWebJsonContext`, generated `BuildInfo` |
+| `src/MeWeb.App` | Avalonia views and view models, `Services/Localizer.cs` (+ `{s:Tr Key}`), `Strings/*.resx`, `Resources/Colors.axaml` |
+| `src/MeWeb.Desktop` | desktop head (`meweb` executable), Windows manifest |
+| `src/MeWeb.Android` | Android head (`software.arasaka.meweb`), resources, manifest |
+| `src/MeWeb.Server` | `meweb.arasaka.software`: `/api/info`, `/api/ip` |
+| `data/languages.json` | every language with `reviewed` or `draft` |
+| `tools/setup.cs` + `setup.json` | pinned build tools |
+| `tools/Screenshots` | headless renders of every view in every language |
+| `branding/` | the icon (SVG source, PNG, ICO) |
+
+## Pitfalls
+
+- **Avalonia 12 Android head:** `[Application] MainApplication : AvaloniaAndroidApplication<App>` plus a non-generic
+  `AvaloniaMainActivity`; the main view comes through `IActivityApplicationLifetime.MainViewFactory`, checked before
+  `ISingleViewApplicationLifetime`.
+- **`ApplicationVersion` must be an integer**: computed from `Version` through separate `VersionMajor/Minor/Patch`
+  properties; one nested property function left it unevaluated (`XA0003`).
+- **A headless Avalonia session does not end on its own** while the pulse animation runs: the screenshot tool calls
+  `Environment.Exit(0)` after dispatching.
+- **The macOS apphost is ad-hoc signed by the .NET 10 SDK even on Linux** (`LC_CODE_SIGNATURE` present); Apple
+  Silicon refuses unsigned arm64 code, so never strip it.
+- **The Windows single-file publish drops native `.pdb` files beside the exe**; only `meweb.exe` ships.