feat(config): adjust workspace layout toggle defaults and add window centering command

dot_config/hypr/bindings.lua

@@ -15,12 +15,11 @@ hl.unbind("SUPER + Q")
 o.bind("SUPER + Q", "Close window", hl.dsp.window.close())
 
 -- Mod+W was tabbed display. Here it flips the workspace layout, and sets every
--- column to 75% of the screen when the workspace turns to scrolling. Dwindle
--- needs no widths, because it re-tiles on its own.
--- Needs ~/.local/bin/omarchy-toggle-layout. Pass another fraction to change
--- the width, e.g. "omarchy-toggle-layout 0.6".
+-- column to 50% of the screen (niri's default-column-width) when the
+-- workspace turns to scrolling. Dwindle needs no widths, because it re-tiles
+-- on its own. Needs ~/.local/bin/omarchy-toggle-layout.
 hl.unbind("SUPER + W") -- was: close window
-o.bind("SUPER + W", "Toggle workspace layout", "omarchy-toggle-layout")
+o.bind("SUPER + W", "Toggle workspace layout", "omarchy-toggle-layout 0.5")
 
 -- Mod+BackSpace -> last window.
 hl.unbind("SUPER + BACKSPACE") -- was: toggle window transparency
@@ -125,9 +124,8 @@ o.bind("SUPER + CTRL + K", "Previous workspace", hl.dsp.focus({ workspace = "e-1
 -- Scratch workspaces. Omarchy's SUPER + S is taken by the region screenshot
 -- below, so the main toggle (Tern) lands on SUPER + CTRL + S, with
 -- SUPER + A (free in Omarchy) as the home-row alias. Claude Desktop has its
--- own scratch workspace on SUPER + SHIFT + A and SUPER + C (the latter
--- replaces Omarchy's universal copy). SUPER + ALT + S (send window to the
--- scratchpad) is still the Omarchy default and needs no line.
+-- own scratch workspace on SUPER + CTRL + ALT + L. SUPER + ALT + S (send
+-- window to the scratchpad) is still the Omarchy default and needs no line.
 --
 -- All of them go through ~/.local/bin/omarchy-toggle-scratch rather than the
 -- raw special-workspace toggle: it opens each workspace on its home monitor
@@ -202,6 +200,33 @@ o.bind("SUPER + SHIFT + BACKSPACE", "Dismiss last notification", "omarchy-shell
 o.bind("SUPER + ALT + C", "Fit active column", hl.dsp.layout("fit active"))
 o.bind("SUPER + SHIFT + ALT + C", "Fit visible columns", hl.dsp.layout("fit visible"))
 
+-- Super+C (niri center-column). Floating windows go through centerwindow.
+-- On a scrolling workspace the column is re-focused with focus_fit_method
+-- briefly set to 0 (center), then restored, so plain focus moves keep
+-- niri's center-focused-column "never". A relative "move" can't do this: the
+-- tape stops at its first column, so the leftmost window never reaches the
+-- middle. Dwindle and master have nothing to scroll; the key does nothing.
+local function center_window()
+  local window = hl.get_active_window()
+  if not window then
+    return
+  end
+  if window.floating then
+    hl.dispatch(hl.dsp.window.center())
+    return
+  end
+  if not window.workspace or window.workspace.tiled_layout ~= "scrolling" then
+    return
+  end
+  local fit_method = hl.get_config("scrolling.focus_fit_method")
+  hl.config({ scrolling = { focus_fit_method = 0 } })
+  hl.dispatch(hl.dsp.focus({ window = window }))
+  hl.config({ scrolling = { focus_fit_method = fit_method } })
+end
+
+hl.unbind("SUPER + C") -- was: universal copy
+o.bind("SUPER + C", "Center window / column", center_window)
+
 -- ─── Applications ───────────────────────────────────────────────────────────
 -- Same modifier block as the niri config. Each one focuses an open window
 -- before it launches a new one. The launch command uses the same desktop

dot_config/hypr/looknfeel.lua

@@ -120,10 +120,20 @@ hl.animation({ leaf = "borderangle", enabled = true, speed = 100, bezier = "line
 --   },
 -- })
 
--- https://wiki.hypr.land/Configuring/Layouts/Scrolling-Layout/
--- hl.config({
---   scrolling = {
---     -- See only one column per screen instead of two.
---     column_width = 0.97,
---   },
--- })
+-- Scrolling layout, matched to niri's layout block
+-- (~/.config/niri/config.d/20-layout-and-overview.kdl). Wins over Omarchy's
+-- column_width = 0.49.
+hl.config({
+  scrolling = {
+    -- default-column-width { proportion 0.5; }
+    column_width = 0.5,
+    -- preset-column-widths; SUPER + R / SUPER + SHIFT + R cycle these
+    -- (colresize +conf / -conf via omarchy-cycle-window-size).
+    explicit_column_widths = "0.333, 0.5, 0.667",
+    -- center-focused-column "never": scroll only as far as needed to fit the
+    -- focused column. SUPER + C centers on demand.
+    focus_fit_method = 1,
+    -- niri keeps a lone column at its own width instead of filling the screen.
+    fullscreen_on_one_column = false,
+  },
+})