[GREEN] Implement desktop list/detail flows for Workspace, Sources, Hooks, and Reports

[ksamaschke]

Phase

GREEN

## Deliverable
Implement the minimum route-content changes needed to satisfy the desktop workflow tests for all four routes.

## Dependencies
- Parent work item: #217.

## Completion evidence
- Implementation notes for route-by-route content architecture.

• Evidence that the RED tests now pass.

  Acceptance criteria

  • Each route presents a desktop-first content model.

• Dashboard-style card composition no longer defines the primary route experience.

  Parent: Work Item: Redesign Workspace, Sources, Hooks, and Reports as desktop list/detail flows #217

[ksamaschke]

Starting GREEN for #217 in worktree /Users/karsten/Work/Development/intelligentcode-ai/intelligent-code-agents-codex-217-route-flows-20260315082619 on branch codex/217-route-flows-20260315082619.\n\nNext step: convert Workspace, Sources, Hooks, and Reports to a shared desktop master/detail shell and make the new route-flow RED tests pass without regressing the desktop shell/sidebar/settings slices.

[ksamaschke]

GREEN is complete in the dedicated worktree branch codex/217-route-flows-20260315082619.\n\nImplemented desktop route-flow changes:\n- moved Workspace, Sources, Hooks, and Reports onto a shared two-pane desktop master/detail shell\n- kept repository and source-management ownership in the main-window Sources route\n- replaced the hooks card matrix with focused hook list/detail selection and replaced stacked reports cards with a selector/detail inspector\n\nValidation so far:\n- npm run build:quick\n- node --test dist/tests/installer/desktop-route-flow-red-phase.test.js dist/tests/installer/desktop-shell-ux.test.js dist/tests/installer/desktop-source-route-red-phase.test.js dist/tests/installer/desktop-sidebar-routes-red-phase.test.js dist/tests/installer/desktop-settings-window-red-phase.test.js dist/tests/installer/dashboard-source-actions-style.test.js dist/tests/installer/source-management-state.test.js