Build section-level help tours across Home, learning workflows, and Admin

[Copilot]

This issue requested complete in-app Help coverage for core learner flows and admin sections. This PR adds targeted tour content so Help now resolves meaningful guidance for Home, Experiences, Bingo, Check-ins, Assignments, and each listed Admin function area.

• Help coverage for learner workflows

  • Updated Home tour copy to describe task/calendar usage.
  • Replaced Bingo fallback (“No Help Available”) with section guidance.
  • Added explicit tour setup in Check-ins (InstallmentReport) and Assignments (AssignmentShell).

• Help coverage for Admin functions

  • Added route-aware help setup in Admin.tsx using useTour.
  • Mapped admin section routes to focused help text for:
    • courses
    • rubrics
    • concepts
    • users
    • schools
    • consent_forms
  • Kept a default admin help message for unmatched admin subroutes.

• Localization support

  • Added new home.* translation keys in config/locales/home.en.yml for admin help title + per-section descriptions.

const SECTION_HELP_KEYS: Record<string, string> = {
  courses: "home.admin_help_courses",
  rubrics: "home.admin_help_rubrics",
  concepts: "home.admin_help_concepts",
  users: "home.admin_help_users",
  schools: "home.admin_help_schools",
  consent_forms: "home.admin_help_consent_forms"
};

const adminSection = (adminMatch?.params?.["*"] || "").split("/")[0];
const description = t(SECTION_HELP_KEYS[adminSection] || "home.admin_help");

• Fixes Build help for all sections #47