Initial global Obsidian config

Shared config extracted from obsidian-config; vault-specific files (bookmarks.json, daily-notes.json) excluded.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Claude-Session: https://claude.ai/code/session_01ASYabtTgxSxJPjxPmBK9PJ

app.json

@@ -0,0 +1,25 @@
+{
+  "vimMode": false,
+  "showUnsupportedFiles": true,
+  "livePreview": true,
+  "showInlineTitle": false,
+  "mobileToolbarCommands": [
+    "editor:undo",
+    "editor:redo",
+    "editor:swap-line-up",
+    "editor:swap-line-down",
+    "editor:move-caret-up",
+    "editor:move-caret-down",
+    "editor:move-caret-left",
+    "editor:move-caret-right",
+    "editor:insert-wikilink",
+    "insert-current-date",
+    "editor:toggle-checklist-status",
+    "editor:toggle-bullet-list",
+    "editor:indent-list",
+    "editor:unindent-list",
+    "editor:configure-toolbar"
+  ],
+  "promptDelete": true,
+  "alwaysUpdateLinks": true
+}