Refactor tasks translation file to have one placeholder per task-type

Fixes #979

website/public/locales/en/tasks.json

@@ -1,5 +1,4 @@
 {
-  "write_initial_prompt": "Write your prompt here...",
   "default": {
     "unchanged_title": "No changes",
     "unchanged_message": "Are you sure you would like to continue?"
@@ -12,18 +11,21 @@
     "label": "Create Initial Prompts",
     "desc": "Write initial prompts to help Open Assistant to try replying to diverse messages.",
     "overview": "Create an initial message to send to the assistant",
-    "instruction": "Provide the initial prompts"
+    "instruction": "Provide the initial prompts",
+    "response_placeholder": "Write your prompt here..."
   },
   "reply_as_user": {
     "label": "Reply as User",
     "desc": "Chat with Open Assistant and help improve it's responses as you interact with it.",
     "overview": "Given the following conversation, provide an adequate reply",
-    "instruction": "Provide the user's reply"
+    "instruction": "Provide the user's reply",
+    "response_placeholder": "Write your reply here..."
   },
   "reply_as_assistant": {
     "label": "Reply as Assistant",
     "desc": "Help Open Assistant improve its responses to conversations with other users.",
-    "overview": "Given the following conversation, provide an adequate reply"
+    "overview": "Given the following conversation, provide an adequate reply",
+    "response_placeholder": "Write your reply here..."
   },
   "rank_user_replies": {
     "label": "Rank User Replies",

website/src/components/Tasks/CreateTask.tsx

@@ -58,7 +58,11 @@ export const CreateTask = ({
               text={inputText}
               onTextChange={textChangeHandler}
               thresholds={{ low: 20, medium: 40, goal: 50 }}
-              textareaProps={{ placeholder: t("tasks:write_initial_prompt"), isDisabled, isReadOnly: !isEditable }}
+              textareaProps={{
+                placeholder: t(getTypeSafei18nKey(`tasks:${taskType.id}.response_placeholder`)),
+                isDisabled,
+                isReadOnly: !isEditable,
+              }}
             />
           </Stack>
         </>