V1.11.1: HP and money are the DM's to change

- A player can no longer heal or hurt their own character: the Damage,
  Heal and Temp HP controls on the sheet are the DM's, and the server
  refuses the change from anyone else. Players still roll their own
  death saves.
- A player can no longer add money to their own purse or write it off:
  recording a gain or a spend is the DM's, in any coin or in cash, on
  the sheet and on the server.
- Players still exchange gold, silver and copper on the sheet, give
  money to another character, and buy from or change money with an NPC.
- All packages at version 1.11.1.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/package.json

@@ -1,7 +1,7 @@
 {
   "name": "frontend",
   "private": true,
-  "version": "1.11.0",
+  "version": "1.11.1",
   "type": "module",
   "scripts": {
     "dev": "vite",

frontend/src/pages/CharacterSheetPage.tsx

@@ -485,7 +485,8 @@ export function CharacterSheetPage() {
         onError={(err) => setFormError(extractErrorMessage(err))}
       />
 
-      {canEdit && (
+      {/* HP is the DM's to change; a player reads it. */}
+      {isDM && (
         <div className="flex-row mt-sm flex-wrap">
           <NumberInput
             min={1}
@@ -515,20 +516,18 @@ export function CharacterSheetPage() {
             />
           </label>
           {/* Armor is an equipped item now; this is the DM's own adjustment on top. */}
-          {isDM && (
-            <label className="flex-row gap-sm" title="Added to AC on top of what equipped gear gives. Can be negative.">
-              Extra AC (DM) <InfoTip term="ARMOR_BONUS" />
-              <NumberInput
-                key={`armor:${character.armorBonus}`}
-                min={-30}
-                max={30}
-                keepValue
-                defaultValue={character.armorBonus}
-                style={{ width: 70 }}
-                onBlur={(e) => patchCharacter.mutate({ armorBonus: Number(e.target.value) })}
-              />
-            </label>
-          )}
+          <label className="flex-row gap-sm" title="Added to AC on top of what equipped gear gives. Can be negative.">
+            Extra AC (DM) <InfoTip term="ARMOR_BONUS" />
+            <NumberInput
+              key={`armor:${character.armorBonus}`}
+              min={-30}
+              max={30}
+              keepValue
+              defaultValue={character.armorBonus}
+              style={{ width: 70 }}
+              onBlur={(e) => patchCharacter.mutate({ armorBonus: Number(e.target.value) })}
+            />
+          </label>
         </div>
       )}
 
@@ -867,7 +866,8 @@ export function CharacterSheetPage() {
           change for you: if you are short of a coin, a bigger one is broken. Cash ($) is kept apart: it is never
           exchanged for coins.
         </p>
-        {canEdit && (
+        {/* Recording a gain or a spend is the DM's; a player gives, buys and exchanges. */}
+        {isDM && (
           <div className="flex-row flex-wrap">
             <NumberInput
               min={1}