Fix Homebrew macOS dependency deprecation warning

[r3dbars]

Why

Fixes #1707, reported by @mustafakapasi. Tapping or loading Transcripted emits Homebrew's deprecation warning for the string comparison form of depends_on macos:.

Product Impact

• Affects: Homebrew installation metadata.
• Lane: release ops.
• Keeps the existing macOS 26+ and Apple Silicon requirements.

What changed

-  depends_on macos: ">= :tahoe"
+  depends_on macos: :tahoe

This is the cask users actually install: the README and issue reproduction use brew tap r3dbars/transcripted https://github.com/r3dbars/transcripted. Homebrew names the local checkout homebrew-transcripted, but the explicit tap URL points to this repository. No separate r3dbars/homebrew-transcripted repository was found.

The Homebrew Cask Cookbook defines the bare symbol as a minimum OS release. The README, Info.plist (26.0), and package platform all already require macOS 26. Both release cask writers change only version/checksum, so they preserve this fix.

How I checked it

• ruby -c Casks/transcripted.rb: passed.

• git diff --check: passed.

• Agent preflight: passed; mapped release checks are recorded below.

• Independent Codex review of the complete diff against origin/main at 7c483f8c5e4c792f79eec6eef415967446dc14db: PASS, no findings or rejected findings. Reviewed tap ownership, OS semantics, release writers, and unchanged metadata.

• Temporary Homebrew checkout (Homebrew/brew@8f87b3091d7dde4d51adb492e4f0a1fd4f8b4bdf): reproduced the exact warning with the base cask; the fixed cask no longer emits it. brew info --json=v2 --cask resolves identical dependencies before/after, including macos: {">=": ["26"]}. No app installation was performed.

• Focused release metadata suite: 28/28 passed. Updated its existing assertion, which required the deprecated syntax.

• The temporary Homebrew version also warns about the existing url verified: parameter; that separate warning is unchanged and outside Warning: Calling string comparion format for 'depends_on macos' is deprecated #1707.

• bash build-deps.sh --force: passed.

• bash scripts/ops/transcripted-qa-bench.sh --mode full: PASS, 15/15 checks, including app build, all 12,751 fast tests, integration/core tests, and release-health fixtures.

• SKIP_NOTARIZATION=1 REGISTER_SENTRY_RELEASE=0 bash build-beta.sh '' Justin: passed; local packaging only, with no notarization or publication.

Risk Review

The cask declaration and its existing release-metadata test expectation change. Version, checksum, download URL, architecture, Sparkle/appcast, and app source are unchanged. No new app release is needed for this tap syntax correction. The fix reaches tap users after merge and a tap refresh; this draft PR does not publish it.

Notes

Please review; do not merge automatically. No issue closure, release publication, or other worktree changes are part of this PR.

Maestro lanes: Codex implementation and independent review used. Claude, Local, and Windows skipped for this small cask syntax change; maestro-delegate is unavailable on the validation Mac.