Release notes written from the commits since the previous tag

- The release page's "What's new" now comes from each commit's subject and body since the
  previous tag, without trailers or any line naming the assistant that helped write them.
- `tools/release.sh notes` writes the notes alone; the release checkout fetches the tags.

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

CLAUDE.md

@@ -13,6 +13,7 @@ dotnet run tools/setup.cs -- --group packaging             # pinned nfpm into to
 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,...]
+tools/release.sh notes                                     # artifacts/release-notes.md alone, nothing built
 dotnet run tools/strings.cs -- check                       # every language against English
 dotnet run tools/strings.cs -- set Key values.json         # one key, every language at once
 dotnet run tools/strings.cs -- merge keys.json             # many keys: {"Key": {"en": "…", "it": "…"}}
@@ -125,6 +126,10 @@ The Android release key: alias `meweb`, certificate SHA-256
   themed icons), and the splash uses the same foreground. Both vectors hold `branding/meweb.svg`'s drawing scaled into
   the central 66 of 108 units around its smallest enclosing circle; a change to the drawing goes into all three files.
   The plain `mipmap-xxxhdpi/icon.png` is only for Android 7.x.
+- **Release notes are the commits since the previous tag.** `tools/release.cs` writes "What's new" from each
+  commit's subject (without the `me-web? x.y:` prefix) and body, dropping trailers and any line that mentions Claude;
+  the release step needs `fetch-depth: 0` for the tags. So a commit body is written for the people who download the
+  release: plain words, one bullet per change they would notice.
 - **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.