[FEATURE] - PR7 : Web admin

[pulk17]

[FEATURE]

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Home dashboard, platform status, and administration. Depends on #1201.

What's here
Home is an inbox of recent runs that finished with failures, each expandable into its failing tests grouped by category - so there's an obvious place to start rather than a blank page. Counters across the top for failing tests, active tests, samples and queue depth, all derived from queries the page already makes.

Status shows the queue, what's running, and dependency health.

Admin covers users and roles, blocked users, maintenance mode per platform, forbidden extensions, and API tokens.

Baseline promotion
This is the destructive action in the console and it's shaped carefully: admin-only, behind a per-row overflow menu, behind a dialog that spells out that the output becomes the expected baseline for every future run on all platforms and the current hash is discarded.

There is deliberately no bulk accept. Replacing baselines should take one considered click per test.

Review notes
Role gating in the UI is a convenience - the API enforces it again on every one of these endpoints, and I'd rather that stayed the case.

[sonarqubecloud]

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