Add localization strings and iOS test infrastructure

- Expand Localizable.xcstrings with 426 new localization entries
- Add xctestplan files (CI, Cleanup, Parallel, Seed) for structured test runs
- Add run_ui_tests.sh script for UI test execution

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.claude/settings.local.json

@@ -0,0 +1,24 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(head:*)",
+      "Bash(ls:*)",
+      "Bash(tail:*)",
+      "Bash(xcodebuild:*)",
+      "Bash(find:*)",
+      "Bash(curl:*)",
+      "Bash(git add:*)",
+      "Bash(git commit:*)",
+      "Bash(git push:*)",
+      "Bash(git fetch:*)",
+      "Bash(git checkout:*)",
+      "Bash(git:*)",
+      "Bash(python3:*)",
+      "Bash(grep:*)",
+      "Bash(ps:*)",
+      "Bash(stdbuf:*)",
+      "Bash(sysctl:*)",
+      "Bash(tee:*)"
+    ]
+  }
+}