feat(frontend): surface tracker intake controls

[anirudh5harma]

Summary

The desktop dashboard now exposes issue-intake configuration directly in project settings and makes canonically linked sessions recognizable on both the board and inspector. Settings preserve hidden project configuration, enforce the daemon's explicit-rule guard, and keep tracker behavior daemon-owned.

Closes #2283.

Depends on #2288. This draft is intentionally stacked on that backend branch; after #2288 merges it will be rebased onto main so the final diff contains only the nine frontend files.

This ports aoagents/ReverbCode#425 and adapts it to current destination behavior: manually created tasks also use the raw issueId field, so only canonical github: identifiers receive tracker-specific UI treatment.

Scope Notes

• Intake settings cover enabled state, repository override, labels, assignee, and per-poll limit.
• Provider selection remains fixed while the backend supports one provider.
• Dry-run previews, last-poll status, activity history, and dedicated pause/resume APIs remain future work.
• No polling, matching, or tracker writes run in Electron.

Validation

• Focused frontend suite: 4 files, 80 tests
• Full frontend suite: 40 files, 375 tests
• npm run typecheck
• npm run package
• Prettier and git diff --check

A live daemon-backed visual pass is currently blocked by canonical main's duplicate migration version 20; component behavior and the production package build are covered above.

Post-Deploy Monitoring & Validation

After #2288 is available, enable intake for a disposable project and confirm settings reload unchanged, an eligible issue produces a session with a canonical badge, and manually created tasks do not show an intake badge. Watch renderer console/API errors during save and daemon validation responses. Lost hidden config, mislabeled manual tasks, or a settings save that cannot round-trip is the rollback trigger.