Carry the colour scheme into btop and tmux

Two more applications that keep their own palette and so never followed
the desktop. btop was on "Default" and had never been themed at all;
tmux had Tokyo Night Moon hardcoded across seventeen lines, which meant
a dark status bar sitting under a light terminal in light mode.

Both themes are authored rather than borrowed. btop ships a
"tokyo-night" theme, but it is the Night variant (#1a1b26) where the
rest of this desktop is Moon (#222436), and two Tokyo Nights side by
side read as a mistake; it ships no Tokyo Night light theme at all.
Colours come from kitty's theme files so a terminal and what runs inside
it cannot disagree.

tmux follows kitty's shape: the colours move to themes/, tmux.conf
sources a generated current-theme.conf, and running servers are
re-sourced so an open session changes immediately rather than at next
launch. btop is different -- it OWNS btop.conf and rewrites it on exit,
so only the color_theme line is edited in place and the file is not
symlinked into the repository. btop reads its theme once at startup, so
a running instance keeps the old colours; forcing a restart would kill a
process the user is watching.

The tmux light theme took two passes. Mapping the palette role-for-role
put the standard Day accents on a mid-grey panel at 2.74:1 and 2.94:1 --
under the 3:1 floor, on a bar you read at a glance. It now uses Day's
darker accent variants on a lighter panel: 4.42:1 and 4.17:1, and
5.01:1 / 4.73:1 for the light text inside the inverted blocks.

The helper also now reports every target rather than only kitty. Saying
"kitty: applied" while silently skipping three other applications is
how a half-applied theme goes unnoticed.

Not changed: bat is configured with --theme ansi, which follows the
terminal's own palette, so it already tracks kitty with nothing to do.

Claude-Session: https://claude.ai/code/session_01BRvzt4H8XXLPVH5MyYdk9L

config/dot/btop/themes/tokyonight-day.theme

@@ -0,0 +1,57 @@
+# Tokyo Night Day for btop, the light counterpart to tokyonight-moon.
+#
+# btop ships no Tokyo Night light variant at all, and the nearest stock light
+# theme (flat-remix-light) is a different palette that happens to have a similar
+# background. Same colours as kitty/themes/tokyonight-day.conf so the terminal
+# and what runs inside it cannot disagree.
+#
+# Gradients keep the same low -> middle -> high meaning as the dark theme, using
+# Day's darker, more saturated accents: the light versions of these hues are too
+# faint to read as a filled meter.
+
+theme[main_bg]="#e1e2e7"
+theme[main_fg]="#3760bf"
+theme[title]="#3760bf"
+theme[hi_fg]="#2e7de9"
+theme[selected_bg]="#c4c8da"
+theme[selected_fg]="#2e7de9"
+theme[inactive_fg]="#7079a8"
+theme[proc_misc]="#587539"
+
+theme[cpu_box]="#a8aecb"
+theme[mem_box]="#a8aecb"
+theme[net_box]="#a8aecb"
+theme[proc_box]="#a8aecb"
+theme[div_line]="#c4c8da"
+
+theme[temp_start]="#2e7de9"
+theme[temp_mid]="#8c6c3e"
+theme[temp_end]="#f52a65"
+
+theme[cpu_start]="#2e7de9"
+theme[cpu_mid]="#9854f1"
+theme[cpu_end]="#f52a65"
+
+theme[free_start]="#c4c8da"
+theme[free_mid]="#007197"
+theme[free_end]="#2e7de9"
+
+theme[cached_start]="#007197"
+theme[cached_mid]="#2e7de9"
+theme[cached_end]="#9854f1"
+
+theme[available_start]="#8c6c3e"
+theme[available_mid]="#b15c00"
+theme[available_end]="#f52a65"
+
+theme[used_start]="#587539"
+theme[used_mid]="#8c6c3e"
+theme[used_end]="#f52a65"
+
+theme[download_start]="#c4c8da"
+theme[download_mid]="#2e7de9"
+theme[download_end]="#007197"
+
+theme[upload_start]="#c4c8da"
+theme[upload_mid]="#9854f1"
+theme[upload_end]="#7847bd"

config/dot/btop/themes/tokyonight-moon.theme

@@ -0,0 +1,56 @@
+# Tokyo Night Moon for btop, matched to Panama's palette.
+#
+# btop ships a "tokyo-night" theme, but it is the Night variant (#1a1b26). The
+# rest of this desktop is Moon (#222436), and two Tokyo Nights side by side read
+# as a mistake rather than as a choice.
+#
+# The *_start/_mid/_end triples are gradients btop draws meters with: low,
+# middle, and high. They run blue -> yellow -> red so a saturated resource is
+# obvious at a glance without reading the number.
+
+theme[main_bg]="#222436"
+theme[main_fg]="#c8d3f5"
+theme[title]="#c8d3f5"
+theme[hi_fg]="#82aaff"
+theme[selected_bg]="#3b4261"
+theme[selected_fg]="#82aaff"
+theme[inactive_fg]="#636da6"
+theme[proc_misc]="#a5e8b5"
+
+theme[cpu_box]="#4d5685"
+theme[mem_box]="#4d5685"
+theme[net_box]="#4d5685"
+theme[proc_box]="#4d5685"
+theme[div_line]="#3b4261"
+
+theme[temp_start]="#82aaff"
+theme[temp_mid]="#ffc777"
+theme[temp_end]="#ff757f"
+
+theme[cpu_start]="#82aaff"
+theme[cpu_mid]="#c099ff"
+theme[cpu_end]="#ff757f"
+
+theme[free_start]="#3b4261"
+theme[free_mid]="#589ed7"
+theme[free_end]="#86e1fc"
+
+theme[cached_start]="#86e1fc"
+theme[cached_mid]="#82aaff"
+theme[cached_end]="#c099ff"
+
+theme[available_start]="#ffc777"
+theme[available_mid]="#ff966c"
+theme[available_end]="#ff757f"
+
+theme[used_start]="#a5e8b5"
+theme[used_mid]="#ffc777"
+theme[used_end]="#ff757f"
+
+theme[download_start]="#3b4261"
+theme[download_mid]="#82aaff"
+theme[download_end]="#86e1fc"
+
+theme[upload_start]="#3b4261"
+theme[upload_mid]="#c099ff"
+theme[upload_end]="#fca7ea"