feat: move the desktop bar to DP-1, and add the mail module

The two bars were both on DP-3, which put the workspaces and the window list
on a rotated 1080px screen while 2560px sat unused next to it. Status stays on
DP-3 alone; the desktop itself moved to DP-1, where the window list has room.

This replaces the stock bar rather than sitting beside it, so hyprland's
autostart now launches this config instead of a bare waybar. ~/.config/waybar
is left on disk, but nothing reads it.

Mail comes over from the stock bar as the same notmuch watcher, minus the
glyph: the envelope is a CSS background and the unread count stays text,
because the count is the content rather than decoration, exactly like the
clock. Its format carries a trailing space so the pill survives the empty
state, since the watcher emits an empty text when nothing is unread and
waybar draws no widget at all for a custom module whose output is empty.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

1 files changed, 14 insertions, 8 deletions

diff --git a/SPEC.md b/SPEC.md
index 16a701b..7d151d1 100644
--- a/SPEC.md
+++ b/SPEC.md
@@ -23,17 +23,22 @@ pointed at DP-3.
 
 ## Layout
 
-    top     [📅 Wed 15/09] [🕑 14:32] [●●]      [S]      [●] [🔊] [tray] [⏻] [🇮🇹]
-             date           time       vm     launcher  priv vol   tray present lang
+    DP-3  [📅 Wed 15/09] [🕑 14:32] [●]   [S]   [●] [✉ 9] [🔊] [tray] [⏻] [🇮🇹]
+           date           time       vm  launcher priv mail vol  tray present lang
 
-    bottom  [1..8]                                          [ open windows ]
-             workspaces                                       taskbar
+    DP-1  [1..8]                                          [ open windows ]
+           workspaces                                       taskbar
 
-DP-3 is rotated, so a bar there is 1080px wide rather than 1920. One bar
-holding every module was too crowded at that width, so status sits on top and
-the desktop itself along the bottom. Both are one waybar process reading one
+DP-3 is rotated, so a bar there is only 1080px wide. One bar holding every
+module was too crowded at that width, so status stays on DP-3 alone and the
+desktop itself, the workspaces and the window list, moved to DP-1 where there
+are 2560px to spread them across. Both are one waybar process reading one
 stylesheet: waybar takes a top-level array of bars.
 
+This replaces the stock bar rather than sitting beside it. Hyprland starts it
+from `~/.config/hypr/sections/autostart.lua`, which used to launch a bare
+`waybar`; `~/.config/waybar/` is left on disk but nothing reads it.
+
 Each bracket is one pill. Neighbouring pills in a cluster share a background
 and weld together with asymmetric corner radii; clusters are separated by
 transparent gaps, so the bar reads as groups rather than a continuous strip.
@@ -50,7 +55,8 @@ transparent gaps, so the bar reads as groups rather than a continuous strip.
 | center | `wlr/taskbar` | `icon-theme` config key | Per-window application icons. |
 | right | `group/wireplumber` | `image` module | Drawer group kept as it is today. |
 | right | `tray` | application-provided | |
-| right | `custom/presentation` | CSS, keyed on the module's class | Presentation mode, the same `statusctl`-backed module the DP-1 bar runs. It already emits an empty text and a state class, so the icon is chosen in CSS and the glyphs are simply dropped. |
+| right | `custom/mail` | CSS, plus the count as text | Unread mail, the same notmuch watcher the stock bar ran. The envelope is a CSS background; the count stays text, because it is content rather than decoration, exactly like the clock. |
+| right | `custom/presentation` | CSS, keyed on the module's class | Presentation mode, the same `statusctl`-backed module the stock bar ran. It already emits an empty text and a state class, so the icon is chosen in CSS and the glyphs are simply dropped. |
 | right | `image#lang` | `flag-it.svg` / `flag-gb.svg`, shipped here | An `image` module: `hyprland/language` styles as `#language` only, with no per-language class, so a flag cannot be selected in CSS. |
 
 Dropped from the current bar: `custom/breaktimer`, `custom/mail`,