feat: close #94 installed chromium; silence Hyprland update-news

Re-boot of the offline install disk proves the residual #94 pass:
chromium on PATH, https/html mime → chromium-browser.desktop, and the
browser window actually opens. Kill ecosystem update-news / donation nag
so first boot is not Hyprland's "updated to …!" dialog.

agent/JOURNAL.md

@@ -19,6 +19,20 @@ Template:
 
 ---
 
+## 2026-07-15 — Close #94 installed chromium + kill Hyprland update-news
+- **Task:** Residual #94 (chromium on installed path) + first-boot polish
+  seen while probing.
+- **Did:** Re-booted leftover offline install disk (`target.img`). Probe:
+  Chromium 150 on PATH, https/html → `chromium-browser.desktop`, Chromium
+  window opens (`about:blank` + keyring prompt). Closed #94. Added
+  `ecosystem.no_update_news` + `no_donation_nag` (every first boot showed
+  “Hyprland updated to 0.55.x!”).
+- **Verified:** **V2** install re-boot screenshots `/tmp/nomarchy-v2-94/`;
+  V0 `nix flake check --no-build`; HM gen conf contains ecosystem keys.
+- **Pending:** V3 optional on Acer (hardware already had no browser on
+  *live* before #103; installed path is the one that mattered).
+- **Next suggestion:** #107 state.json rename, or #98 if screenshot lands.
+
 ## 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.