[dashboard-language] Reactive core

[github-actions]

Caution

Protected files were modified in this change.
This pull request is in request_review mode and requires explicit human scrutiny before merge.

Protected files: README.md, package-lock.json, package.json

Milestone

Reactive core

Specification coverage

• Target architecture slice: tiny reactive core inspired by VanJS
• Verified behavior for state, derived values, effects, disposal, and keyed list reconciliation
• Requirement identifiers covered by tests in this increment:
  • DLS-CONF-004

What shipped

• Added pages/dashboard/src/reactive.js with deterministic reactive state, derived values, effect reruns, and disposal.
• Added pages/dashboard/src/dom.js with a small hyperscript-style DOM builder, attribute/dataset handling, and keyed list reconciliation supporting updates, removals, and reordering.
• Added unit tests for state updates, derived recomputation, effect disposal, DOM creation, and keyed list behavior.
• Added a browser e2e spec covering stable keyed rendering in the browser harness.
• Updated pages/dashboard/PLAN.md and pages/dashboard/README.md for the shipped slice.

Quality gates

• npm install ✅
• npm run typecheck ✅
• npm run lint ✅
• npm test ✅
• npm run test:e2e ⚠️ blocked by infrastructure

Blockers

• Playwright browser launch is blocked in this runner because the Chromium executable is not installed (browserType.launch: Executable doesn't exist). The e2e tests are present, but browser execution could not be completed in this environment.

Next milestone

Document model and validation

Generated by 🧩 Daily Dashboard Language Renderer · pi · gpt54 · 26.8 AIC · ⌖ 12.3 AIC · ⊞ 5.2K · ◷

[github-actions]

Protected files were modified in this pull request and require manual scrutiny before merge.

Please verify that each protected-file change is intentional, policy-compliant, and safe:

• Protected files: README.md, package-lock.json, package.json

[pelikhan]

@copilot fix infrastructure issues with playwright (use MCP instead of playwright-cli)

[pelikhan]

@copilot fix https://github.com/githubnext/central-agentic-ops/actions/runs/33166469178/job/98834496735#step:9:1

[Copilot]

@copilot fix infrastructure issues with playwright (use MCP instead of playwright-cli)

Updated the dashboard renderer to use the built-in Playwright MCP browser tooling instead of the incompatible playwright-cli flow, and aligned the plan/test expectation with that runtime. Verified with the targeted workflow contract test: node --test --test-name-pattern='daily dashboard renderer builds incrementally inside its own directory' tests/unit/workflow-contract.test.mjs.

[Copilot]

@copilot fix https://github.com/githubnext/central-agentic-ops/actions/runs/33166469178/job/98834496735#step:9:1

Fixed the failing browser check by loading the actual DOM source through a data-URL module import instead of a file:// import from about:blank, which was causing the heading not to render in Playwright. Verified with: cd /home/runner/work/central-agentic-ops/central-agentic-ops/pages/dashboard && npx playwright test test/e2e/reactive-core.spec.js --config=playwright.config.mjs (pass, 1/1). Commit: 7302fad.