docs(agent): file #127 — docked idle blackout, no wake, undock no panel

Bernardo 2026-07-15: docked idle → black screens; external KB/mouse did
not wake; unplugging the external did not restore eDP; Caps Lock still
worked. Captures the "session crash" as a seat brick. HARDWARE-QUEUE
repro + journal steps for the next controlled run.

agent/JOURNAL.md

@@ -19,6 +19,18 @@ Template:
 
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+## 2026-07-15 — File #127 docked idle blackout (no code)
+- **Task:** Bernardo: docked laptop idle → black screens; external KB/mouse
+  no wake; unplug external did not restore panel; Caps Lock still worked.
+  Explains the "session crash" (seat brick, not agent-only).
+- **Did:** NOW **#127** + HARDWARE-QUEUE capture steps. Code read: AC idle
+  path is lock+DPMS not suspend; dock mode disables eDP; both wake and
+  undock recovery failed on the incident.
+- **Verified:** V0 (docs/agent only).
+- **Pending:** hardware journal capture on next repro; then fix.
+- **Next suggestion:** continue fix batches, or dig into #127 if Bernardo
+  can leave SSH open for a controlled repro.
+
 ## 2026-07-15 — V2 verification of fix batches (doctor-float + test-install)
 - **Task:** V2-test shipped items that admit VM harnesses (#95 doctor,
   #123 bake, #112/#124/#125 install path).