set: [terminal].right_margin=2 + frame_width=78 (cols-2) + omp.json trailing spacer

Operator reported "framing too wide STILL" with the previous cols-1
margin -- WT pseudo-console reports WindowWidth 1 cell over the
visible cells during the first paint (before scrollbarState='hidden'
takes effect), so cols-1 still wrapped the right frame char and the
right-aligned time segment onto the next line. cols-2 always leaves
2 cells of effective slack regardless of WT timing.

- mios.toml [terminal].frame_width: 79 -> 78
- mios.toml [terminal].right_margin: NEW key, SSOT for the slack count
- mios.omp.json: trailing 2-cell text spacer in the right block so the
  time segment can't wrap when the pseudo-console over-reports width

The Get-MiOS.ps1 + build-mios.ps1 reader fix (read mios.toml as
explicit UTF-8 instead of cp1252) ships in mios-bootstrap @ 6faface.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

Author: Kabuki94

usr/share/mios/mios.toml

@@ -1621,8 +1621,9 @@ podman_pkg          = "RedHat.Podman-Desktop"
 cols                = 80
 rows                = 20      # 20 = MiOS portal-feel default; 30 for taller "console" feel
 scrollback_rows     = 9000
-frame_width         = 79      # cols - 1 -- per operator "everything should be -1 width" so the frame leaves a 1-cell gutter on the right edge that neither the frame nor the right-aligned powerline can overflow into
+frame_width         = 78      # cols - 2 -- per operator "framing too wide STILL" the previous cols-1 still wrapped because WT pseudo-console reports 1 cell over the visible cell count when the scrollbar reservation hasn't been applied yet (profiles.defaults scrollbarState='hidden' takes effect after the first paint). cols-2 leaves a 2-cell gutter so neither the box-drawing frame nor the right-aligned powerline block can wrap regardless of WT version / DPI / scrollbar timing.
 frame_height        = 19      # rows - 1 -- one row reserved for the prompt under the dashboard
+right_margin        = 2       # cells of slack between the rightmost paintable cell and where prompt right-aligned segments stop. Applied in Get-MiOS.ps1's WIDTH calc (MIN(WindowWidth - right_margin, frame_width)) and as a trailing spacer segment in mios.omp.json. cols-2 not cols-1: cols-1 still wrapped on the operator's hardware because the WT reported window width was 1 cell wider than the actual visible/paintable width during the first prompt render.
 
 # ----------------------------------------------------------------------------
 # [terminal.install] -- the BOOTSTRAP window dims (taller so the install

usr/share/mios/oh-my-posh/mios.omp.json

@@ -207,6 +207,12 @@
             "time_format": "15:04"
           },
           "template": " {{ .CurrentDate | date .Format }} "
+        },
+        {
+          "//": "Trailing spacer -- reserves 2 cells of right margin so the powerline right block can't wrap to the next line on hosts where the pseudo-console reports a window width 1+ cells over the visible cells (operator's WT during the first paint, before scrollbarState='hidden' takes effect). final_space=true at the theme root reserves 1 additional cell on top, totaling 3 cells of slack from the rightmost cell. Lifted from mios.toml [terminal].right_margin via build-mios.ps1's mios.omp.json substitution; this 2-space template is the vendor default.",
+          "type": "text",
+          "style": "plain",
+          "template": "  "
         }
       ]
     },