After PR #484 introduced TinyTeX-{N}-{os}[-{arch}].tar.xz filenames, the install scripts and install_tinytex() still used the old names unconditionally. This adds version-gated logic: daily installs and versions > v2026.03.02 use the new names; versions ≤ v2026.03.02 keep the old names.

Naming scheme summary

arm64 Linux now gets a prebuilt binary for daily and new-scheme versions.

tools/install-bin-unix.sh

• Computes USE_NEW_NAMES via shell string comparison against "2026.03.02"
• Linux arch detection: old naming allows only x86_64; new naming also allows aarch64
• Derives OS_ARCH suffix and EXT, then builds the full URL (including extension) in one place

tools/install-bin-windows.bat

• Computes USE_NEW_NAMES via PowerShell [string]::CompareOrdinal against '2026.03.02'
• New: TINYTEX_FILENAME=%TINYTEX_INSTALLER%-windows, BUNDLE_EXT=exe
• Old: existing zip/exe logic unchanged

R/install.R

• need_source_install(version='') gains a version parameter; aarch64 Linux returns FALSE for daily/latest/> '2026.03.02'
• install_prebuilt(): new naming builds e.g. TinyTeX-1-darwin-v2026.04.tar.xz; old naming path unchanged
• Both install_tinytex() and install_prebuilt() pass version to need_source_install()

tinytex-releases monthly-release.yaml — no changes needed

The existing rename loop already handles both old and new filenames generically:

for f in TinyTeX*; do mv $f $(echo "$f" | sed "s/^TinyTeX[^.]*/&-${TINYTEX_RELEASE}/"); done
# TinyTeX-1-darwin.tar.xz  →  TinyTeX-1-darwin-v2026.04.tar.xz  ✓
# TinyTeX-1.zip             →  TinyTeX-1-v2026.04.zip             ✓  (backward-compat copy)

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