[pkmaster21]

What changed and why

Fixes #401.

Removes the two Studio leftovers from #401 that are still on main:

• discoveryContext in studio/wifi_discovery.go. It came in with mDNS WiFi discovery (feat(studio,agent): mDNS auto-discovery for WiFi physical devices #86) but was never called: wifiDiscovery.Start() builds its own context with context.WithCancel. It was the only use of the time import, so that goes too.
• studio/frontend/src/app.css. It came in with the Studio beta (v0.6.0: connection stability + MCP binary split + Studio (Beta Preview) #77) and holds Wails starter-template styles (#logo, .result, .input-box). Nothing imports it; main.ts only imports style.css.

The third item, the commented-out wails/v2 replace in studio/go.mod, was already removed in #477, so this PR leaves go.mod alone (the live replace ... => .. stays). No behavior changes.

Evidence

Before (main) and after (this branch):

$ git grep -n discoveryContext -- studio/
before: studio/wifi_discovery.go:127:func discoveryContext(...)
after:  (no output)
$ ls studio/frontend/src/app.css
before: studio/frontend/src/app.css
after:  No such file or directory

Checks on this branch:

studio/frontend$ npm run build   ✓ built (exit 0)
studio$ go vet ./...             exit 0
studio$ go build ./...           exit 0
studio$ go test ./...            ok .../studio, ok .../studio/e2e
$ make test                      exit 0

flutter test not run: nothing under probe_agent/ changed.

AI use

I used Claude Code to help set up the repo, trace where the leftovers came from, run the build and tests, and draft the CHANGELOG entry and this description. I reviewed every line I'm submitting.

Checklist

All PRs

• go build ./... passes locally
• go test ./... passes locally
• CHANGELOG.md (root) updated

If probe_agent/lib/ changed

• dart analyze lib/ passes: N/A, this PR doesn't touch probe_agent/
• flutter test passes: N/A, no probe_agent/ changes
• dart pub publish --dry-run passes: N/A, no probe_agent/ changes
• probe_agent/CHANGELOG.md updated: N/A, no probe_agent/lib/ changes (root CHANGELOG updated instead)
• probe_agent/README.md updated: N/A, nothing visible on pub.dev changed

If new ProbeScript commands or CLI flags were added

• probe_agent/README.md Features section updated: N/A, no new commands or flags
• website/src/content/docs/ doc page updated: N/A, no new commands or flags
• website/astro.config.mjs sidebar updated: N/A, no new doc pages

If this is a release PR

• probe_agent/pubspec.yaml version bumped: N/A, not a release PR
• vscode/package.json version bumped: N/A, not a release PR
• docs/wiki/Home.md current version updated: N/A, not a release PR

[github-actions]

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[pkmaster21]

I have read the CLA Document and I hereby sign the CLA