Add missing component and hook tests, raise coverage thresholds

13 new test files for untested components (color-palette, player-management,
stat-block, settings-modal, export/import dialogs, bulk-import-prompt,
source-fetch-prompt, player-character-section) and hooks (use-long-press,
use-swipe-to-dismiss, use-bulk-import, use-initiative-rolls). Expand
combatant-row tests with inline editing, HP popover, and condition picker.

Component coverage: 59% → 80% lines, 55% → 71% branches
Hook coverage: 72% → 83% lines, 55% → 66% branches

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

vitest.config.ts

@@ -26,12 +26,12 @@ export default defineConfig({
 					branches: 70,
 				},
 				"apps/web/src/hooks": {
-					lines: 72,
-					branches: 55,
+					lines: 83,
+					branches: 66,
 				},
 				"apps/web/src/components": {
-					lines: 59,
-					branches: 55,
+					lines: 80,
+					branches: 71,
 				},
 				"apps/web/src/components/ui": {
 					lines: 93,