t3639: fix remaining PR #1948 review feedback in worktrunk.md and worktree-helper.sh

[marcusquinn]

Summary

Addresses the remaining unactioned review feedback from PR #1948 that was tracked as quality-debt in issue #3639.

Changes:

• worktree-helper.sh: localdev_auto_branch_rm now emits a non-fatal yellow warning on helper failure, matching the observability parity of localdev_auto_branch (which already had this). Previously || true silently swallowed failures.

• worktrunk.md: Fixed example URL scheme from https:// to http:// with a note that https:// requires mkcert/local CA configuration — avoids misleading users who haven't set up TLS locally.

• worktrunk.md: Added pre-remove hook snippet so Worktrunk users get route cleanup on wt remove. Previously only post-create was documented, leaving stale routes when using Worktrunk without worktree-helper.sh.

• worktrunk.md: Clarified that auto-removal only applies when using worktree-helper.sh; Worktrunk users need the pre-remove hook explicitly.

Verification

• shellcheck: no new violations (SC1091 info pre-existing, not caused by this change)
• markdownlint-cli2: 0 errors

Closes #3639

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🔍 Code Quality Report

�[0;35m[MONITOR]�[0m Code Review Monitoring Report

�[0;34m[INFO]�[0m Latest Quality Status:
SonarCloud: 0 bugs, 0 vulnerabilities, 414 code smells

�[0;34m[INFO]�[0m Recent monitoring activity:
Sat Mar 14 00:14:09 UTC 2026: Code review monitoring started
Sat Mar 14 00:14:10 UTC 2026: SonarCloud - Bugs: 0, Vulnerabilities: 0, Code Smells: 414

📈 Current Quality Metrics

• BUGS: 0
• CODE SMELLS: 414
• VULNERABILITIES: 0

Generated on: Sat Mar 14 00:14:12 UTC 2026

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Generated by AI DevOps Framework Code Review Monitoring

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Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud