[Story]: PM dashboard — project list & project drilldown (project → members)

[adoLime]

User Story

As a PM, I want my dashboard to list the projects I'm assigned to as PM, so that I can pick the project I want to look into.

As a PM, when I click a project, I want to see all users mapped to that project (reusing the existing team-management view, filtered by project), so that I can spot who needs my attention. Clicking a user opens the existing member detail page (onboarding progress + skills + relevant info — already built in TeamMemberDetailPage).

Context & Motivation

• Type: Functional (Onboarding / PM)
• Parent epic: 06 EPIC - Onboarding Journey & Digital Adoption #55 (06 EPIC – Onboarding Journey & Digital Adoption)
• Teams: team:frontend (project list + drilldown), team:backend (PM-scoped project endpoint)
• Related: [Story]: PM view — onboarding status across team members #180 (closed — flat team view), [Story]: Admin project management (create / delete projects + assign PMs) #197 (PM↔Project mapping — Sprint 5, provides PM field on Project), [Story]: Request to reorder onboarding steps #226 (reorder-request signal — Sprint 5), [Story]: Feedback on generated onboarding path #184 (feedback signal), [Feature]: Rework Onboarding Step #214 (skip-request signal).
• Sister story: "User-card indicators — onboarding-completed badge + reorder-request indicator" (covers the per-card badges; this story covers the project list + drilldown structure).

Dependencies

• Depends on: [Story]: Admin project management (create / delete projects + assign PMs) #197 (Project must have a PM field so the dashboard can list "PM's projects").
• Reuses: existing projectIds filter on the team-overview endpoint (UserApiService.kt).
• Layer 3 (member detail): already implemented in TeamMemberDetailPage — not re-built, just linked.

Acceptance Criteria

Layer 1 — PM project list

• PM dashboard shows a list of projects where the current user is the assigned PM (depends on [Story]: Admin project management (create / delete projects + assign PMs) #197).
• Each project entry shows: name, member count, and aggregate indicators (e.g. count of pending feedback / skip / reorder requests across the project's members).
• PM only sees their own projects; projects of other PMs are hidden / 403 (depends on [Story]: RBAC with Admin / User separation #93).

Layer 2 — Project drilldown

• Clicking a project navigates to a project-scoped team list (reuses the existing TeamManagementPage, filtered by that project's id).
• Clicking a user card navigates to the existing TeamMemberDetailPage (Layer 3, unchanged).
• Empty / loading / error states; i18n (en/de).

Out of scope

• Layer 3 (member detail page) — already implemented, not re-built.
• Per-card indicators (completed badge, reorder-request indicator) — owned by sister story "User-card indicators — onboarding-completed badge + reorder-request indicator".
• Reorder-request workflow itself — owned by [Story]: Request to reorder onboarding steps #226.
• PM↔Project assignment — owned by [Story]: Admin project management (create / delete projects + assign PMs) #197.

Sub-Tasks (by team)

• Backend — endpoint that returns the projects for the current PM (depends on [Story]: Admin project management (create / delete projects + assign PMs) #197's PM field on Project); reuse the existing team-overview endpoint with a project filter (already supports projectIds).
• Frontend — PM dashboard project list (replaces/augments the flat TeamManagementWidget); project-drilldown view (filter existing TeamManagementPage by project).
• QA — tests for PM-scoped project list, 403 for other PMs' projects, navigation to member detail.