Sync Omarchy themes to Claude Code (#6480)

* Sync Omarchy themes to Claude Code

Claude Code 2.1.118 added custom themes as JSON files in
~/.claude/themes, watched and hot-reloaded, so this follows the same
shape as the Pi integration (da53c0ff, bin/omarchy-theme-set-pi).

A claude.json template renders from each theme's colors.toml — no
per-theme files, so every stock and community theme is covered — and
omarchy-theme-set-claude copies the result into
~/.claude/themes/omarchy.json on theme switch, retinting running
sessions without a restart.

The theme just appears as "Omarchy" in the /theme picker, and picking
it once (or running omarchy-theme-set-claude --activate) makes every
future theme switch carry Claude Code along. No ~/.claude directory,
no-op.

* Respect custom Claude config directory

---------

Co-authored-by: David Heinemeier Hansson <david@hey.com>

default/themed/claude.json.tpl

@@ -0,0 +1,43 @@
+{
+  "name": "Omarchy",
+  "base": "{{ theme_type }}",
+  "overrides": {
+    "claude": "{{ accent }}",
+    "claudeShimmer": "{{ mix accent foreground 35% }}",
+    "text": "{{ foreground }}",
+    "inverseText": "{{ background }}",
+    "inactive": "{{ mix foreground background 40% }}",
+    "inactiveShimmer": "{{ mix foreground background 25% }}",
+    "subtle": "{{ muted }}",
+    "suggestion": "{{ cyan }}",
+    "permission": "{{ blue }}",
+    "permissionShimmer": "{{ mix blue foreground 35% }}",
+    "remember": "{{ yellow }}",
+    "success": "{{ green }}",
+    "error": "{{ red }}",
+    "warning": "{{ yellow }}",
+    "warningShimmer": "{{ mix yellow foreground 35% }}",
+    "merged": "{{ magenta }}",
+    "promptBorder": "{{ accent }}",
+    "promptBorderShimmer": "{{ mix accent foreground 35% }}",
+    "planMode": "{{ cyan }}",
+    "autoAccept": "{{ yellow }}",
+    "bashBorder": "{{ bright_yellow }}",
+    "ide": "{{ bright_cyan }}",
+    "diffAdded": "{{ mix background green 15% }}",
+    "diffRemoved": "{{ mix background red 15% }}",
+    "diffAddedDimmed": "{{ mix background green 8% }}",
+    "diffRemovedDimmed": "{{ mix background red 8% }}",
+    "diffAddedWord": "{{ mix background green 32% }}",
+    "diffRemovedWord": "{{ mix background red 32% }}",
+    "userMessageBackground": "{{ mix background foreground 6% }}",
+    "userMessageBackgroundHover": "{{ mix background foreground 10% }}",
+    "bashMessageBackgroundColor": "{{ mix background foreground 6% }}",
+    "memoryBackgroundColor": "{{ mix background foreground 6% }}",
+    "selectionBg": "{{ selection_background }}",
+    "rate_limit_fill": "{{ accent }}",
+    "rate_limit_empty": "{{ mix background foreground 20% }}",
+    "briefLabelYou": "{{ yellow }}",
+    "briefLabelClaude": "{{ accent }}"
+  }
+}