feat: add guided onboarding

[markstockhausen]

Description

This PR introduces a full onboarding flow and user dashboard to the Memo platform. Users are now guided through a practice session when they first sign up, helping them understand the competency mapping task before starting real sessions.

Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📝 Documentation update
• 🎨 Style/formatting changes (no functional changes)
• ♻️ Code refactoring (no functional changes)
• ⚡ Performance improvements
• 🔧 Configuration changes
• [] 🧪 Test additions or modifications
• 🚀 Deployment/DevOps changes

Changes Made

• Client:

  • Added full onboarding flow (OnboardingPage.tsx, OnboardingPractice.tsx, OnboardingStep.tsx) with a practice mapping session and profile setup step

• Other:

  • Fixed security audit findings

Testing

Test Cases

• Existing functionality still works
• New functionality works as expected
• Edge cases handled appropriately

Manual Testing

• Tested in development environment
• Tested with different user roles/permissions (if applicable)

Screenshots/Videos

Before

Onboarding did not exist

After

[Copilot]

Pull request overview

This PR adds a guided onboarding experience and a contributor dashboard (heatmap + milestone badges), while also switching the session “competency mapping” flow over to a new server-side scheduling + voting pipeline backed by new tables/migrations.

Changes:

• Adds multi-step onboarding with a built-in practice mapping tutorial and “onboarded” tracking via localStorage.
• Introduces a contributor dashboard UI (stats, streaks, heatmap, milestone badges) plus client-side milestone toasts.
• Implements a new backend scheduling/voting system (new entities, repositories, services, controllers, and Flyway migrations) and updates the session client to use it.

Reviewed changes

Copilot reviewed 48 out of 50 changed files in this pull request and generated 8 comments.

Show a summary per file

File	Description
src/pages/SessionPage.tsx	Switches competency mapping to “next task + submit vote”, adds milestones/toasts, end-session overlay, and “all done” state.
src/pages/OnboardingPage.tsx	Replaces the old onboarding stub with a 5-step guided onboarding flow + practice session.
src/pages/HomePage.tsx	Routes “Start Contributing” to onboarding vs session based on localStorage; updates hero preview + adds network viz.
src/pages/DashboardPage.tsx	New dashboard page fetching contributor stats and rendering heatmap + milestone badges.
src/lib/milestones.ts	Defines milestone/badge metadata and helper for “newly earned” milestones.
src/lib/heatmap-helpers.ts	Adds helper to map activity counts to Tailwind color classes.
src/lib/api/session-helpers.ts	Adds scheduling-based “next relationship task” and “submit vote” helpers; removes relationship creation helper.
src/lib/api/scheduling.ts	New API client for scheduling “next task” and “vote” endpoints.
src/lib/api/contributor-stats.ts	New API client/types for contributor stats endpoint.
src/lib/api/competency-relationships.ts	Removes client-side “create relationship” API method (CRUD now limited to get/delete).
src/index.css	Adds explicit Geist font CSS variables.
src/components/ui/sonner.tsx	Adds themed Sonner toaster wrapper component.
src/components/ui/select.tsx	Adds Radix Select wrapper components.
src/components/ui/popover.tsx	Adds Popover wrapper component (Radix-based).
src/components/ui/dialog.tsx	Adds Dialog wrapper component (Radix-based).
src/components/ui/command.tsx	Adds cmdk-based Command components + Dialog integration.
src/components/session/SessionSummary.tsx	Adds end-of-session summary overlay (continue vs dashboard).
src/components/onboarding/OnboardingStep.tsx	Adds animated step transition wrapper for onboarding.
src/components/onboarding/OnboardingPractice.tsx	Adds onboarding practice tutorial with guided rounds and feedback.
src/components/navbar.tsx	Updates navbar controls (dashboard link, icon tweaks, class refactor).
src/components/dashboard/ContributionHeatmap.tsx	Adds scrollable contribution heatmap visualization.
src/components/competency-network/CompetencyNetworkViz.tsx	Adds lightweight SVG “competency network” preview viz for onboarding/home.
src/components/Layout.tsx	Adjusts layout min-height calculation.
src/App.tsx	Registers toaster and adds the new /dashboard route.
package.json	Adds dependencies for select/cmdk/sonner and a radix-ui dependency.
server/src/main/resources/db/migration/V8__seed_additional_competencies.sql	Seeds additional competencies/relationships/votes to exercise stats + streaks.
server/src/main/resources/db/migration/V7__add_competency_degree.sql	Adds degree column to competencies and backfills/indexes it.
server/src/main/resources/db/migration/V6__create_scheduling_tables.sql	Creates new scheduling tables for aggregated relationships + vote log.
server/src/main/resources/db/migration/V5__drop_old_relationships.sql	Drops the old relationships table/constraints (development reset).
server/src/main/resources/db/migration/V2__seed_sample_data.sql	Removes old relationship seed statements that no longer match schema.
server/src/main/java/de/tum/cit/memo/service/SchedulingService.java	Implements coverage/consensus scheduling pipeline + vote submission logic.
server/src/main/java/de/tum/cit/memo/service/ContributorStatsService.java	Computes total votes, streaks, heatmap daily counts, and badge IDs.
server/src/main/java/de/tum/cit/memo/service/CompetencyRelationshipService.java	Refactors relationship CRUD to align with new aggregated relationship model.
server/src/main/java/de/tum/cit/memo/repository/CompetencyRepository.java	Adds degree-based queries + increment/decrement helpers.
server/src/main/java/de/tum/cit/memo/repository/CompetencyRelationshipVoteRepository.java	Adds vote existence/count + daily aggregation query for stats.
server/src/main/java/de/tum/cit/memo/repository/CompetencyRelationshipRepository.java	Adds scheduling queries: high-entropy candidates, pool relationships, unvoted relationships.
server/src/main/java/de/tum/cit/memo/entity/CompetencyRelationshipVote.java	New entity for raw vote log.
server/src/main/java/de/tum/cit/memo/entity/CompetencyRelationship.java	Refactors relationship entity to aggregated vote counters + entropy + timestamps.
server/src/main/java/de/tum/cit/memo/entity/Competency.java	Adds degree field for scheduling.
server/src/main/java/de/tum/cit/memo/dto/VoteResponse.java	DTO for vote submission response.
server/src/main/java/de/tum/cit/memo/dto/VoteRequest.java	DTO for vote submission request (relationshipId or origin+destination).
server/src/main/java/de/tum/cit/memo/dto/VoteCounts.java	DTO for aggregated vote counts.
server/src/main/java/de/tum/cit/memo/dto/RelationshipTaskResponse.java	DTO for “next relationship” task response.
server/src/main/java/de/tum/cit/memo/dto/CreateCompetencyRelationshipRequest.java	Removes old create-relationship request DTO.
server/src/main/java/de/tum/cit/memo/dto/ContributorStatsResponse.java	DTO for contributor stats endpoint response.
server/src/main/java/de/tum/cit/memo/controller/SchedulingController.java	Adds /api/scheduling/next-relationship and /api/scheduling/vote endpoints.
server/src/main/java/de/tum/cit/memo/controller/ContributorStatsController.java	Adds /api/users/{userId}/stats endpoint.
server/src/main/java/de/tum/cit/memo/controller/CompetencyRelationshipController.java	Removes create endpoint; keeps CRUD with doc pointer to SchedulingController.

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[github-actions]

🔍 Code Quality Report

📊 Code Statistics

🚨 Potential Issues

✅ No console statements found
⚠️ Found 'any' or 'unknown' types - consider using more specific types