Keep Wi-Fi visible when hiding other menu bar icons

Hiding pushed Wi-Fi off along with the third-party app icons. Tune the
spacer boundary to sit just left of Wi-Fi so apps disappear while the
Apple Wi-Fi, Spotlight, Clock, Battery and Control Center icons remain.

💘 Generated with Crush

Assisted-by: Crush:deepseek-v4.1-flash

AGENTS.md

@@ -115,14 +115,19 @@ no control over this, so the app creates its own `NSStatusItem` and:
 ## Hiding other menu bar items
 
 `MenuBarHider` creates a zero-width spacer `NSStatusItem` at launch and grows its
-length to `hiddenLength` (10_000) to push the icons on its left off-screen.
-Verified with `--diag-hide`:
+length to `hiddenLength` (10_000) to push the icons on its left off-screen. Its
+preferred position controls where the hidden/kept boundary lands:
 
-- All third-party apps' icons go to x < 0 (cmux, Kapture, moomoo, WireGuard,
-  TextInputMenuAgent, Now Playing) and so does Wi-Fi.
-- **Spotlight, Clock, Battery and Control Center stay**: macOS pins them to the
-  far right, and a third-party item can never be inserted to their right, so the
-  spacer has nothing to push them with. Do not try to "fix" this; it is a macOS
+- Seed **250** (default) puts the boundary just left of Wi-Fi, so every
+  third-party app icon goes to x < 0 (cmux, Kapture, moomoo, WireGuard,
+  TextInputMenuAgent, Now Playing) while **Wi-Fi (x≈1173), Spotlight, Clock,
+  Battery, Control Center and our hamburger stay visible**.
+- Verified with `--diag-hide` across positions 100–400. Below ~200 Wi-Fi gets
+  hidden too; above ~300 app icons (Now Playing, TextInput) leak back.
+- `debug.spacerPos` (Double) overrides the seed for tuning without rebuilding.
+- **Wi-Fi/Spotlight/Clock/Battery/Control Center cannot be hidden**: macOS pins
+  them to the far right and a third-party item can never be inserted to their
+  right, so the spacer has nothing to push them with. This is a macOS
   constraint, not a bug.
 
 ## Gotchas