add projects page with some charts

[leon1995]

Note

Adds a new Projects page at /projects with project/unrelated minutes charts, introduces project calculation/settings state, extends data loading (time records, projects, project workers), and upgrades factorialhr and reflex.

• UI/Pages:
  • Projects Page: New pages/projects_page.py with date range inputs, “Only active projects” filter, error callout, and Calculate action.
  • Charts: Vertical bar chart for project imputed minutes and bar chart for unrelated minutes.
  • Routing: Add routes.PROJECTS_ROUTE and register page in factorialhr_analysis.py and pages/__init__.py.
• State Management:
  • New States: ProjectSettingsState (date/active filters) and ProjectState (compute imputed/unrelated minutes, chart data, errors, loading flags).
  • DataState Enhancements: Load and store TimeRecord, Project, and ProjectWorker; parallelized in poll_data; clear on reset; internal types switched to Mapping.
• Templates:
  • Remove footer from templates.template layout.
• Dependencies:
  • Bump factorialhr to 5.0.2 and reflex to 0.8.17 (plus transitive lock updates).

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