Bump build number to 767 for TestFlight deploy

[beastoin]

Summary

• Bumps app build number from +766 to +767 to trigger Codemagic TestFlight + Android internal builds
• Required because PR Prerelease: 3 verified fixes — 500s, 401 retry, Firestore cache (#5441 #5442 #5443) #5459 (multipart 401 retry, Firestore cache, people/conversations fix) merged app/ changes without a build number bump
• Without this, Codemagic skips the upload since +766 was already built

Test plan

• Codemagic ios-internal-auto triggers and uploads to TestFlight
• Codemagic android-internal-auto triggers and uploads

by AI for @beastoin

[greptile-apps]

Greptile Summary

This PR is a single-line build number bump in app/pubspec.yaml (from 1.0.525+766 to 1.0.525+767) to unblock Codemagic CI/CD, which skips uploads when a build number has already been processed.

• Increments the Flutter build number (+767) while keeping the version name (1.0.525) unchanged.
• Required to trigger the ios-internal-auto and android-internal-auto Codemagic pipelines after PR Prerelease: 3 verified fixes — 500s, 401 retry, Firestore cache (#5441 #5442 #5443) #5459 merged app changes without a corresponding build number bump.
• No functional or logic changes are introduced; this is a pure CI/CD housekeeping commit.

Confidence Score: 5/5

• This PR is safe to merge; it is a trivial, isolated build number increment with no functional risk.
• The change is a single integer increment to the build number, which carries no logic, security, or dependency risk. The version name is untouched, and the sole purpose is to satisfy Codemagic's deduplication check.
• No files require special attention.

Important Files Changed

Filename	Overview
app/pubspec.yaml	Build number incremented from +766 to +767 to trigger Codemagic CI/CD builds; app version string (1.0.525) is unchanged. No functional code is modified.

Flowchart

%%{init: {'theme': 'neutral'}}%%
flowchart TD
    A["PR #5495 merges\npubspec.yaml +767"] --> B["Codemagic detects\nnew build number"]
    B --> C1["ios-internal-auto\npipeline"]
    B --> C2["android-internal-auto\npipeline"]
    C1 --> D1["Upload to TestFlight"]
    C2 --> D2["Upload to Android\nInternal Track"]

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_{Last reviewed commit: 52e00af}

[beastoin]

lgtm