docs(04-02): complete deactivation notifications plan

Tasks completed: 1/1
- Add deactivation notification method to notifications class

Phase 4 complete - job deactivation system fully functional.

SUMMARY: .planning/phases/04-job-deactivation-system/04-02-SUMMARY.md

.planning/STATE.md

@@ -5,23 +5,23 @@
 See: .planning/PROJECT.md (updated 2026-01-14)
 
 **Core value:** Every job goes through admin approval before mentors see it. The moderation flow is the trust layer that protects mentors from spam or inappropriate content.
-**Current focus:** Phase 4 — Job Deactivation System (In Progress)
+**Current focus:** Phase 4 — Job Deactivation System (Complete)
 
 ## Current Position
 
 Phase: 4 of 7 (Job Deactivation System)
-Plan: 1 of 2 in current phase
-Status: Plan 04-01 complete
-Last activity: 2026-01-14 — Completed Plan 04-01 (job deactivation form)
+Plan: 2 of 2 in current phase
+Status: Phase complete
+Last activity: 2026-01-14 — Completed Plan 04-02 (deactivation notifications)
 
-Progress: ███████████░ 48%
+Progress: ████████████ 52%
 
 ## Performance Metrics
 
 **Velocity:**
-- Total plans completed: 12
-- Average duration: 8.5 min
-- Total execution time: 1.7 hours
+- Total plans completed: 13
+- Average duration: 8.2 min
+- Total execution time: 1.8 hours
 
 **By Phase:**
 
@@ -30,11 +30,11 @@ Progress: ███████████░ 48%
 | 1 | 3 | 6 min | 2 min |
 | 2 | 4 | 42 min | 10.5 min |
 | 3 | 4 | 50 min | 12.5 min |
-| 4 | 1 | 8 min | 8 min |
+| 4 | 2 | 13 min | 6.5 min |
 
 **Recent Trend:**
-- Last 5 plans: 03-01 (15 min), 03-02 (12 min), 03-03 (8 min), 03-04 (15 min), 04-01 (8 min)
-- Trend: Stable (parallelization used for Phases 2 and 3)
+- Last 5 plans: 03-02 (12 min), 03-03 (8 min), 03-04 (15 min), 04-01 (8 min), 04-02 (5 min)
+- Trend: Stable with efficiency improving (Phase 4 completed rapidly)
 
 ## Accumulated Context
 
@@ -77,6 +77,10 @@ Recent decisions affecting current work:
 | 04-01 | Required reason field for deactivation | Captures business intelligence about why jobs are removed |
 | 04-01 | Deactivate button only for published jobs | Reduces UI clutter and prevents confusion with pending/draft jobs |
 | 04-01 | Destructive button styling (red) for deactivate | UX best practice signals significant action to prevent accidental clicks |
+| 04-02 | Deactivation notification triggered only on publish→draft transitions | Prevents spam on draft saves, only notifies on genuine deactivations |
+| 04-02 | Email includes deactivation reason for business intelligence | Allows admins to track patterns and platform effectiveness |
+| 04-02 | Used current_time() for deactivation timestamp | Captures actual deactivation moment rather than post modified date |
+| 04-02 | Deactivation notification follows submission notification pattern | Consistency makes code predictable and maintainable |
 
 ### Deferred Issues
 
@@ -88,6 +92,6 @@ None yet.
 
 ## Session Continuity
 
-Last session: 2026-01-14T[current time]
-Stopped at: Completed Plan 04-01 (job deactivation form)
+Last session: 2026-01-14
+Stopped at: Completed Plan 04-02 (deactivation notifications) - Phase 4 complete
 Resume file: None