fix(display): target the Framework 13 Pro panel

Migration from the ThinkPad X1 Carbon (2880x1800) to the Framework Laptop
13 Pro, whose panel is CSOT MND508ZB1-1 = 2880x1920 3:2 @120Hz and exposes
only 2880x1920@120000Hz / @60000Hz.

shikane was requesting [email protected], a mode this panel cannot provide,
so the variant could never be satisfied: it sat in NoVariantApplied for the
whole session, with 61 historical "Discarded" events. Both profiles now use
2880x1920@120Hz (including the disabled eDP-1 block, whose mode string still
has to resolve). Verified: profile now reaches VariantApplied.

Scale is 1.75 -> 1645x1097 logical, ~147 effective DPI, chosen to reproduce
the ~145 DPI of the old panel at 1.67. 1.75 is exactly representable as
float32, which sway stores scale in; 1.6 and 1.67 are not. 2.0 would be the
only integer (1:1, unresampled) scale but yields just 1440x960 logical.

The .config/sway/config hunk also adds the matching `output $laptop` baseline
so sway does not start at scale 2.0 and re-flow when shikane applies 1.75,
and carries previously-uncommitted session wiring for the scripts below.

shikane's config.toml was previously unversioned; it now lives in this repo
and ~/.config/shikane is a symlink, matching the existing convention.

.config/shikane/config.toml

@@ -0,0 +1,47 @@
+[[profile]]
+name = "laptop"
+exec = ["notify-send shikane \"Profile $SHIKANE_PROFILE_NAME has been applied\""]
+    [[profile.output]]
+    enable = true
+    search = "eDP-1" 
+    # Panel on the Framework Laptop 13 Pro is CSOT MND508ZB1-1 = 2880x1920 (3:2)
+    # @120Hz. /sys/class/drm/card0-eDP-1/modes exposes ONLY 2880x1920@120000Hz
+    # and @60000Hz. The previous value here, [email protected], was the OLD
+    # ThinkPad's panel mode and does not exist on this panel, so shikane could
+    # never satisfy the variant -- the most likely root cause of the
+    # VariantInProgress deadlocks.
+    mode = "2880x1920@120Hz"
+    position = "0,0"
+    # Scale 1.75 chosen deliberately (2026-10-27).
+    # Panel: CSOT MND508ZB1-1, 2880x1920 on 13.5in = 256 PPI. What matters is
+    # effective DPI = PPI/scale; 1.75 -> 147 DPI, which matches the 145 DPI this
+    # laptop's owner previously used on the old ThinkPad (2880x1800 on 14in at
+    # 1.67). The exact equivalent would be 1.765; 1.75 is the nearest value that
+    # is exactly representable as float32 (sway stores scale as float).
+    # 2.0 is the only integer scale (1:1 pixel mapping, no resampling, sharpest)
+    # but gives just 1440x960 logical. 1.5 = max workspace at 171 DPI (small).
+    # History: 1.67/1.5/1.6 all tried; 1.6 was not float-exact (1.600000024).
+    scale = 1.75
+    transform = "normal"
+    adaptive_sync = false
+
+[[profile]]
+name = "External Display"
+exec = ["notify-send shikane \"Profile $SHIKANE_PROFILE_NAME has been applied\""]
+    [[profile.output]]
+    enable = false
+    search = "eDP-1"
+    # Even a disabled block carries a mode string that shikane must resolve
+    # against the panel's mode list, so keep it valid.
+    mode = "2880x1920@120Hz"
+    position = "0,0"
+    scale = 1.75
+    transform = "normal"
+    adaptive_sync = false
+
+    [[profile.output]]
+    enable = true
+    search = "n/DP-(.*)"
+    scale = 1.3
+    transform = "normal"
+    adaptive_sync = false