feat: improve tablet screen controls and participant action states

- Add wake lock and browser fullscreen controls to encounter header/popout
- Re-acquire wake lock after browser release (still doesnt work on tablet)
- Retry fullscreen after Android unlock; keep manual control visible
- Add larger labeled character Save button
- Use distinct panel icon for encounter full-page expansion
- Add strong active/inactive, conditions-open, and editing button states
- Keep inactive participant controls visible
- Add regression tests and update affected characterization tests
- Update project TODO notes

src/tests/ReslotAllPaths.test.js

@@ -57,7 +57,7 @@ describe('reslot on all mutation paths', () => {
     expect(lastParticipantsUpdate().map(p => p.name)).toEqual(['Orc', 'Goblin']);
 
     // open edit modal for Goblin, bump init to 8
-    const editBtns = screen.getAllByTitle('Edit');
+    const editBtns = screen.getAllByRole('button', { name: 'Edit participant' });
     const goblinEdit = editBtns.find(b => b.closest('li')?.textContent.includes('Goblin'));
     fireEvent.click(goblinEdit);