fix: Codemagic bash compat — replace @Q syntax

[beastoin]

Replace ${BETA_DMG_URL@Q} (Bash 4.4+ parameter transformation) with "${BETA_DMG_URL}" in the Codemagic post-build redirect page script. Codemagic's shell doesn't support @Q, causing "bad substitution" that kills the script before prod Cloud Run deploy runs.

v0.11.140 and v0.11.141 both failed on this. Once merged, the next tag will trigger a clean Codemagic build that completes prod deploy.

Closes #5822

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by AI for @beastoin

[greptile-apps]

Greptile Summary

This PR fixes a one-line shell incompatibility in codemagic.yaml that was crashing the post-build redirect page generation step. The ${BETA_DMG_URL@Q} syntax (Bash 4.4+ parameter transformation for shell quoting) is not supported in Codemagic's shell, causing a bad substitution error before the production Cloud Run deploy could run. The fix replaces it with the standard "${BETA_DMG_URL}" expansion, which is consistent with how the same variable is already used in the two sibling HTML attributes on the lines above.

• Root cause addressed: @Q is unavailable in the Bash version Codemagic uses; the script was dying before the prod deploy step.
• Fix is minimal and targeted: only the one <script> line is changed; the meta-refresh and anchor href lines already used the plain "${BETA_DMG_URL}" form without issue.
• No functional change: BETA_DMG_URL is constructed as https://github.com/$GITHUB_REPO/releases/download/$CM_TAG/omi.dmg — a well-formed URL with no characters that could break the double-quoted JS string literal.

Confidence Score: 5/5

• This PR is safe to merge — it is a minimal, correct fix for a verified shell incompatibility with no functional side effects.
• Single-line change replacing an unsupported Bash 4.4+ feature (@Q) with a standard double-quoted variable expansion. The replacement is semantically equivalent for a URL value, consistent with how the same variable is already used in adjacent lines, and directly addresses the confirmed CI failures on v0.11.140 and v0.11.141.
• No files require special attention.

Important Files Changed

Filename	Overview
codemagic.yaml	Replaces the Bash 4.4+ @Q parameter transformation in the beta redirect HTML heredoc with a plain double-quoted variable expansion, restoring compatibility with Codemagic's shell environment.

Sequence Diagram

sequenceDiagram
    participant CM as Codemagic CI
    participant GH as GitHub Releases
    participant GCS as GCS Bucket
    participant Browser as End User Browser

    CM->>CM: Build & sign macOS DMG
    CM->>GH: Upload omi.dmg as release asset
    CM->>CM: Construct BETA_DMG_URL<br/>(github.com/…/omi.dmg)
    CM->>CM: Generate /tmp/macos-beta-index.html<br/>with "window.location.replace("${BETA_DMG_URL}")"
    CM->>GCS: Upload index.html → beta/index.html
    Browser->>GCS: GET beta/index.html
    GCS-->>Browser: HTML with JS redirect
    Browser->>GH: Redirect → download omi.dmg

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_{Last reviewed commit: "fix: replace Bash 4...."}

[beastoin]

lgtm