Add cross-platform debugger DevTools capabilities

[bjdodson-openai]

Description

Collapses the reviewed post-foundation debugger stack into one dependency-complete commit atop current main.

This adds the cross-platform debugger capability set built across #155–#175: explicit ports and authenticated sessions, input control, the legacy web bridge, integrated DevTools, runtime settings, bounded storage and performance inspection, generic and persistent-storage providers, Chromium console streaming, web tracing and performance capture, console clearing, target discovery and selection, component hierarchy/property inspection and editing, and bounded runtime-state inspection.

The aggregate preserves the fixes and discussion outcomes from the original stack, including lifecycle and authentication repairs. Synthetic Slack-shaped redaction fixtures are assembled at runtime so no complete token signature is stored in the commit.

This PR supersedes #155, #156, #157, #158, #159, #160, #161, #162, #163, #164, #165, #166, #167, #168, #169, #170, #171, #172, #173, #174, and #175. Those PRs retain the incremental review history.

Type of Change

• Bug fix (non-breaking change that fixes an issue)
• Documentation improvement
• Performance optimization
• Test improvement
• Other (feature: cross-platform debugger capabilities)

Testing

• Tests pass locally (bazel test //...)
• Added/updated tests for changes (if applicable)
• Tested on multiple platforms (iOS/Android/Web/macOS as applicable)
• Manual testing performed (describe below)

Testing Details

• CLI Jasmine suite: 450/450 passing
• CLI production build: passing
• bazel query //...: 9,700 targets resolved
• Focused Bazel validation passed for runtime debugger, macOS Objective-C, and web renderer targets
• git diff --check and complete-token scans: clean
• Independent aggregate and post-redaction audits: clean

The full repository-wide bazel test //... matrix was not run locally; CI remains the final platform matrix.

Checklist

• Code follows project style guidelines
• Documentation updated (if needed)
• No breaking changes (or documented in description)
• Commit messages follow conventional format
• No secrets, API keys, or internal URLs included

Related Issues

Relates to #154.

Supersedes #155–#175 while preserving their review history.

Additional Context

The foundation from #154 landed through Snap's internal import as 17754a1d. This aggregate is one commit whose parent is the current upstream main commit and includes the reviewed post-foundation fixes omitted by that import.

[github-actions]

⚠️ Bazel & CI Test Results

Test Suite	Result
Snapshot Tests	✅ success
Linux: C++ Tests	❌ failure
API Surface Check	✅ success
Linux: Build Compiler	✅ success
Linux: Module Tests	✅ success
macOS: C++ & Platform Tests	✅ success
Valdi Smoke Tests	❌ failure
Linux: Hotreload Smoke	✅ success
Test Coverage Delta	✅ success
valdi_web Integration Test	✅ success
Linux: Registry Validation	✅ success
Linux: Build & Export	✅ success

Some tests failed. Please check the workflow logs for details.

🚀 Bazel remote cache is now enabled - future builds will be faster!

_{Workflow: Valdi CI}

[clholgat]

Thanks for pulling this together, @bjdodson-openai — the aggregate reads cleanly and the review history from #155–#175 carries over well. We're importing this into our internal monorepo now to run it through the full platform test matrix for more testing. We'll follow up here with results. 🙏