docs(phase-04): add verification and summary for plan 04-02

.planning/phases/04-notifications-et-i3bar/04-02-SUMMARY.md

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+---
+phase: 04-notifications-et-i3bar
+plan: 02
+subsystem: cli
+tags: [i3bar, i3status, json-protocol]
+
+requires:
+  - phase: 04-01
+    provides: shortName function, Notifier, FocusTimer
+provides:
+  - i3bar JSON widget with session status
+  - i3status wrapping for combined output
+  - CLI vmux i3bar subcommand
+affects: []
+
+tech-stack:
+  added: []
+  patterns: [i3bar JSON protocol, i3status wrapper, TTY detection for mode selection]
+
+key-files:
+  created: [i3bar.go, i3bar_test.go]
+  modified: [main.go]
+
+key-decisions:
+  - "TTY detection: standalone mode in terminal, wrapped mode when called by i3bar"
+  - "Format: vmux: auth[!] portal[W] neia[I] with shortName from notify.go"
+
+patterns-established:
+  - "i3bar JSON protocol: header + infinite array of block arrays"
+
+requirements-completed: [I3-03]
+
+duration: 5min
+completed: 2026-03-23
+---
+
+# Plan 04-02 Summary
+
+**Widget i3bar avec liste courte des sessions, wrapping i3status, détection TTY pour mode standalone/wrapped**
+
+## Performance
+
+- **Duration:** 5 min
+- **Tasks:** 3 (2 code + 1 human-verify)
+- **Files modified:** 3
+
+## Accomplishments
+- formatI3BarBlocks : format compact `vmux: auth[!] portal[W]`
+- runI3Bar : standalone (TTY) ou wrapped (pipe/i3bar)
+- 10 tests unitaires pour le formatage
+- TTY detection pour éviter le fallback i3status texte brut
+
+## Task Commits
+
+1. **Task 1: Formatage i3bar + tests** - `a28e8d6`
+2. **Task 2: Boucle i3bar + CLI** - `221a444`
+3. **Task 3: Human verification** - approved
+4. **Fix TTY detection** - uncommitted (sera commité avec la validation globale)
+
+## Files Created/Modified
+- `i3bar.go` — I3BarBlock, formatI3BarBlocks, queryVmuxBlock, runI3Bar (standalone + wrapped)
+- `i3bar_test.go` — 10 tests unitaires
+- `main.go` — case "i3bar" + isTerminal()
+
+## Decisions Made
+- Mode standalone quand stdout est un TTY, wrapped quand c'est un pipe
+- Pas de dépendance externe pour la détection TTY (os.ModeCharDevice)
+
+## Deviations from Plan
+- Ajout de isTerminal() pour fixer le bug i3status plain text
+
+## Next Phase Readiness
+- Dernière phase. Projet v1 complet.
+
+---
+*Phase: 04-notifications-et-i3bar*
+*Completed: 2026-03-23*