feat(desktop): show fleet coordinator status

[ctwoodwa]

What changed

• show the Fleet Coordinator at the top of Console → Coordination Daemons
• report authority, epoch, revision, assignment/attempt counts, and reporting nodes
• expose online, unreachable, token-required, degraded, and not-configured states without relying
  on color alone
• add a Dock Settings connection field that writes the shared Ordinance coordinator config
• keep the bearer token in the native process and preserve its local file reference on URL edits
• remove device assumptions: no customer host, address, user path, or credential is compiled in

Why

Tender is the fleet cockpit. Operators need to see whether the single assignment authority is
reachable and authenticated, while connection targets remain install- and customer-specific
settings rather than hard-coded developer-machine values.

Security and behavior

• accepts only credential-free HTTP(S) origins
• reads the token locally and never returns it through Tauri IPC
• uses atomic mode-0600 config replacement on Unix
• preserves unknown config fields and token references
• serializes status polling so a slow probe cannot create overlapping request bursts
• treats every non-online authority state as requiring attention

Validation

• npm run build
• cargo test --lib (124 passing, 3 ignored)
• Impeccable detector: no findings in either changed TSX surface
• browser QA at the product's fixed 360px tray width
• keyboard focus/ordering verified for both connection fields
• no Tender-origin console errors observed

Stacking

This draft targets feat/daemon-visibility so its diff contains only coordinator visibility and
configuration. Retarget to main after the prerequisite daemon-visibility PR lands.

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✨ Finishing Touches

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• Create PR with unit tests
• Commit unit tests in branch feat/coordinator-visibility

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