docs(02-06): complete PermissionsViewModel and SitePickerDialog plan

- Add 02-06-SUMMARY.md with TDD results and deviation documentation
- Update STATE.md: progress bar 87%, record metrics, ISessionManager decision
- Update ROADMAP.md: phase 02-permissions now 6/7 summaries (In Progress)

.planning/STATE.md

@@ -3,8 +3,8 @@ gsd_state_version: 1.0
 milestone: v1.0
 milestone_name: milestone
 status: planning
-stopped_at: Completed 02-04-PLAN.md
-last_updated: "2026-04-02T12:00:54.419Z"
+stopped_at: Completed 02-06-PLAN.md
+last_updated: "2026-04-02T12:08:05.688Z"
 last_activity: 2026-04-02 — Roadmap created, requirements mapped, all 42 v1 requirements assigned to phases
 progress:
   total_phases: 5
@@ -64,6 +64,7 @@ Progress: [█░░░░░░░░░] 13%
 | Phase 02-permissions P01 | 5min | 2 tasks | 9 files |
 | Phase 02-permissions P02 | 7min | 2 tasks | 4 files |
 | Phase 02-permissions P04 | 1min | 2 tasks | 2 files |
+| Phase 02-permissions P06 | 4min | 2 tasks | 6 files |
 
 ## Accumulated Context
 
@@ -106,6 +107,7 @@ Recent decisions affecting current work:
 - [Phase 02-permissions]: Folder is not a SecurableObject in CSOM — ListItem used for permission extraction — Required by CSOM type system; Folder inherits from ClientObject not SecurableObject
 - [Phase 02-permissions]: Principal.Email excluded from CSOM Include — email not needed for PermissionEntry — Principal base type has no Email property; only User subtype does; avoids CS1061
 - [Phase 02-permissions]: CsvExportService uses UTF-8 with BOM for Excel compatibility; HtmlExportService uses UTF-8 without BOM
+- [Phase 02-permissions]: ISessionManager interface extracted from concrete SessionManager — required for Moq-based unit testing of PermissionsViewModel
 
 ### Pending Todos
 
@@ -119,6 +121,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-04-02T12:00:50.874Z
-Stopped at: Completed 02-04-PLAN.md
+Last session: 2026-04-02T12:08:01.918Z
+Stopped at: Completed 02-06-PLAN.md
 Resume file: None