Modernize Orchestrator web UI and audit workflows

[renecannao]

Pull Request

Related issue: none

Description

Modernizes Orchestrator's legacy web interface while preserving its operational behavior and existing API contracts.

This PR:

• restores a clear clusters landing page and topology workspace with semantic instance cards, responsive graph sizing, and working command interactions;
• replaces broken or mismatched framework assets with locally served Bootstrap 5 assets and scopes the new workspace CSS to avoid global regressions;
• rebuilds failure-analysis, audit, recovery, status, agents, seeds, discovery, About, FAQ, and navigation surfaces into consistent operational workspaces;
• updates project and documentation links for the ProxySQL Orchestrator repository and current MySQL/PostgreSQL support;
• adds functional audit persistence and a bounded failover harness for the Docker lab;
• hardens lab cleanup so it only restores mysql1 when the harness actually stopped it, and never broadly recreates MySQL services;
• preserves the historical begin-maintenance response details while adding the exact MaintenanceKey used for safe cleanup.

The UI was exercised against the local three-node MySQL lab on desktop and narrow viewports, including populated audit, failure-detection, recovery-list, and recovery-detail states after controlled failovers.

Validation

• go test ./... -count=1: all Go packages passed
• Node UI tests: 26/26 passed across all six test files
• functional smoke: 50 passed / 0 failed / 0 skipped
• shell syntax checks and the combined functional/MariaDB Compose configuration passed
• committed browser QA: 45/45 route/viewport entries passed at 1440×900, 794×900, and 390×844, with zero body overflow and zero new warning/error console entries
• topology/browser interactions passed: collapse/expand, single View and Details activation, drag exclusion, modal dismissal, responsive navigation, audit pagination, and narrow internal canvas scrolling
• malformed partial failure-analysis payloads now render the explicit unavailable state; audit/recovery API text is DOM-safe; one-row recovery lists and proxy-prefixed pagination have focused regression coverage\n- dynamic Bootstrap controls passed focused mutation coverage and live post-load alert dismissal (one activation, no duplicate action, and no console error)\n- controlled failover and final lab checks completed with topology restoration, unchanged MySQL container identities and roles, and no ProxySQL recreation
• git diff --check origin/master...HEAD and git show --check --oneline HEAD passed
• scoped final reviews found no Critical or Important issues

Related UI PRs

• PR feat(ui): Bootstrap 5 polish — icons, D3 v7, asset cache-busting #125's local Bootstrap Icons, shared asset cache policy, Bootstrap 5 compatibility behavior, and D3 v7 topology work were reapplied deliberately. The integration also fixes the asset-version render order, duplicate modal activation, tree-coordinate restoration, agent grid structure, and icon-only accessibility findings; the overlapping PR was not merged wholesale.
• PR UI/UX: Fix layout rendering issues in web interface #126's reliable local-asset and working-navigation intent is satisfied while retaining the approved Bootstrap 5 interface and current ProxySQL documentation/repository links. Its Bootstrap 3/IE8 and Openark rollback was not adopted.

Checklist

• Code formatted with gofmt (please avoid goimports)
• Tests added/updated
• CI passes (unit, integration, system tests)
• DCO sign-off included (git commit -s)
• Related issue linked above

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