ci: fix missing secrets and remove duplicate steps in CI workflows

[CharlVS]

Summary

This PR fixes CI workflows to properly pass all required secrets (including Matomo analytics), removes duplicate build steps, and adds missing artifact uploads to Docker workflows.

Changes

Duplicate Build Steps Removed

• Mobile builds: Removed duplicate generate-assets action call
• Desktop builds: Removed duplicate generate-assets action call
• Renamed action and steps to clarify they perform both dry-run and actual build

Missing Secrets Added

• Desktop & Mobile builds: Added MATOMO_URL and MATOMO_SITE_ID
• Docker builds (Android & Linux): Added all Trello, Feedback, and Matomo secrets
• Firebase hosting workflows: Added Matomo secrets to merge workflow
• SDK integration preview: Added Matomo secrets

Artifact Uploads Added

• Docker Android build: Now uploads APK artifact (komodo-wallet-android-docker.apk)
• Docker Linux build: Now uploads Linux bundle artifact (komodo-wallet-linux-docker.zip)
• Both with 5-day retention

Action Improvements

• Renamed generate-assets action to better reflect it handles complete build process
• Updated description to clarify dry-run + actual build workflow

Motivation

The workflows were:

1. Missing Matomo secrets - causing analytics to be disabled in CI builds with warning: "CI environment detected without Matomo config"
2. Calling build twice - both mobile-builds.yml and desktop-builds.yml were calling the generate-assets action twice with identical parameters
3. Incomplete Docker configurations - docker-linux-build.yml was missing all feedback/analytics secrets that docker-android-build.yml had
4. Missing artifact uploads - Docker workflows were building but not uploading artifacts to GitHub Actions, only showing logs with no downloadable builds

Performance Impact

Desktop Build Times (vs. dev branch)

Linux builds:

• Before: 9m 24s average
• After: 4m 20s average
• Improvement: 5m 4s (53.9% faster) ⚡

Windows builds:

• Before: 14m 36s average
• After: 13m 57s average
• Improvement: 38s (4.4% faster)

Overall average:

• Before: 12m 0s
• After: 9m 8s
• Improvement: 2m 51s (23.8% faster)

The significant Linux build improvement is primarily due to removing duplicate build step execution.

Testing

• Verified all secrets exist in repository using gh secret list
• Confirmed build.sh script reads environment variables correctly
• All workflows now properly pass secrets to build processes
• Artifact paths match Flutter build output directories
• Build time improvements verified across multiple workflow runs

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch fix/desktop-ci-missing-secrets

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[github-actions]

Visit the preview URL for this PR (updated for commit b888afc):

https://walletrc--pull-3167-merge-7clmb1c7.web.app

_{(expires Fri, 10 Oct 2025 10:32:23 GMT)}

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[DeckerSU]

I checked the binaries produced by this PR, and it looks like MATOMO_URL and everything else are built and compiled in. So, LGTM.