ci: publish full releases and name the macOS asset by version

[fseiffarth]

Two CI/CD fixes. Both only take effect on a tag push, so they need to reach main to matter.

1. /releases/latest was 404ing

Every release published with prerelease: true. GitHub never marks a pre-release as Latest, so https://github.com/fseiffarth/ProjectEldrun/releases/latest returned 404 — the exact link README.md:121 sends users to in order to download a build.

Verified before the change:

$ gh api repos/fseiffarth/ProjectEldrun/releases/latest
{"message":"Not Found","status":"404"}

Now publishes as a full release. The release notes still describe the build as alpha; this flag is about discoverability, not maturity claims.

2. macOS asset was named by commit SHA

The DMG was renamed to Eldrun-<sha>-universal.dmg while the other three carry the version:

Eldrun-e47219a1836faba620bd828d56038b13d5dadaaa-universal.dmg   ← odd one out
Eldrun_0.1.33_amd64.AppImage
Eldrun_0.1.33_amd64.deb
Eldrun_0.1.33_x64-setup.exe

Now Eldrun_<version>_universal.dmg. Two details:

• The move is guarded ([ "$dmg" = "$target" ] || mv …) — Tauri may already emit exactly that name, and mv x x fails, which under the step's bash -e would break the macOS package job.
• The upload glob widens from *-universal.dmg to *universal.dmg so it matches either separator. Without this the rename would silently upload nothing.

Verification

Workflow YAML parses; prerelease reads False. The rename logic was exercised locally in both branches — name already correct (idempotent, no-op) and name differing (renamed) — with the upload glob confirmed to match the result in each.

No application code touched.

🤖 Generated with Claude Code