fix(build): create server/web before copying web dist

[rpuneet]

make build-local-web fails in fresh clones/worktrees with cp: server/web/dist: No such file or directory because the server/web/ parent directory only exists once the daemon embed stub has been created. Add mkdir -p server/web before the copy so the target builds from a pristine checkout.

Part of #3334

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved local web builds by automatically creating the required web directory before assembling build files.
  • Prevented build failures when the target directory does not already exist.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: ASSERTIVE

Plan: Pro

Run ID: 4c8bd4d8-ed1e-4abe-81f3-694882087696

📥 Commits

Reviewing files that changed from the base of the PR and between 8ea1877 and e133f71.

📒 Files selected for processing (1)

• Makefile

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📝 Walkthrough

Walkthrough

The build-local-web Makefile target now creates server/web before replacing its dist contents with the local web build output.

Changes

Local web build

Layer / File(s)	Summary
Prepare web asset destination Makefile	The build-local-web target adds mkdir -p server/web before removing and copying distribution files.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Poem

I’m a rabbit in the build-room bright,
Making folders neat and right.
Web files hop from source to nest,
Then dist settles in for rest.
One small command, a smoother flight!

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The description explains the fix and issue, but it misses the required template sections for Summary, Changes, Test Plan, and Checklist.	Reformat the PR body to include the template headings, add a Changes bullet, a Test Plan entry, and the checklist items.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely summarizes the main fix: creating server/web before copying web dist.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch fix/makefile-fresh-clone

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