Fix CI: build tags for optional dapp-fm packages and Go 1.25 covdata workaround

[Copilot]

CI failing on two issues: (1) dapp-fm packages embed demo-track.smsg (50MB, gitignored), (2) Go 1.25.0 emits stderr on packages without tests when using -coverprofile, causing non-zero exit.

Changes

Build tags for optional packages

• Add // +build dappfm to cmd/dapp-fm* and pkg/player/assets.go
• Create pkg/player/assets_stub.go (!dappfm tag) that excludes demo track, returns fs.ErrNotExist from GetDemoTrack()
• Standard builds skip these packages; use -tags dappfm when demo file available

Taskfile test workaround

test:
  cmds:
    - |
      if output=$(go test -coverprofile=coverage.txt ./... 2>&1); then
        echo "$output"
      else
        # Only fail if actual test failures exist (not just covdata warnings)
        if echo "$output" | grep -q "^FAIL"; then
          echo "$output"
          exit 1
        else
          echo "$output"
        fi
      fi

Distinguishes real failures from Go 1.25.0's no such tool "covdata" warnings.

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• invalid-url
  • Triggering command: /tmp/go-build3019234592/b493/website.test /tmp/go-build3019234592/b493/website.test -test.testlogfile=/tmp/go-build3019234592/b493/testlog.txt -test.paniconexit0 -test.timeout=10m0s conf�� 220236-3a3c6141ego1.25.0 220236-3a3c6141e-c=4 ux-amd64/pkg/tool/linux_amd64/vet (dns block)
  • Triggering command: /tmp/go-build376386275/b509/website.test /tmp/go-build376386275/b509/website.test -test.testlogfile=/tmp/go-build376386275/b509/testlog.txt -test.paniconexit0 -test.gocoverdir=/tmp/go-build376386275/b509/gocoverdir -test.timeout=10m0s -test.coverprofile=/tmp/go-build376386275/b509/_cover_.out s/web_identity_provider.go (dns block)
  • Triggering command: /tmp/go-build1019962875/b509/website.test /tmp/go-build1019962875/b509/website.test -test.testlogfile=/tmp/go-build1019962875/b509/testlog.txt -test.paniconexit0 -test.gocoverdir=/tmp/go-build1019962875/b509/gocoverdir -test.timeout=10m0s -test.coverprofile=/tmp/go-build1019962875/b509/_cover_.out ver .cfg p/go-build376386/home/REDACTED/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.25.0.linux-amd64/pkg/toopercent encoding/csv -lang=go1.24 /home/REDACTED/go/-trimpath 3862�� /tmp/go-build376-p 386275/b495/covemain ux-amd64/pkg/tool/linux_amd64/cover 6016232/b458 main ted_at} ux-amd64/pkg/toopercent (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.

[gemini-code-assist]

Warning

You have reached your daily quota limit. Please wait up to 24 hours and I will start processing your requests again!

[coderabbitai]

Important

Review skipped

Bot user detected.

To trigger a single review, invoke the @coderabbitai review command.

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

• 🔍 Trigger a full review

---

_{Comment @coderabbitai help to get the list of available commands and usage tips.}

[codecov]

Codecov Report

❌ Patch coverage is 0% with 9 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
pkg/player/assets_stub.go	0.00%	9 Missing ⚠️

📢 Thoughts on this report? Let us know!