Update .gitea/issue_template/proposal.yaml

see SOI/experimental-projects#3 (comment)

.gitea/issue_template/proposal.yaml

@@ -2,27 +2,46 @@ name: Task Proposal
 about: Propose an idea for a task to be used in contests at SOI.
 labels:
   - task
+  - task/round/any
+  - task/difficulty/any
 body:
   - type: markdown
     attributes:
       value: |
         Thanks for taking the time to propose a task!
         Do not forget to **update the issue title** with your unique task name.
-  - type: input
+
+  - type: textarea
     id: author
     attributes:
       label: Author
-      description: Who had the idea for this task?  If applicable, also link original source.
-      placeholder: stofl, inspired by https://codeforces.com/problemset/problem/1/A
+      description: Who had the idea for this task?  If applicable, also link to the original source.
+      placeholder: "@stofl and @binna, inspired by https://codeforces.com/problemset/problem/1/A"
     validations:
       required: true
+  
+  - type: textarea
+    id: task
+    attributes:
+      label: Task description
+      description: "Formal problem statement.  Optional: Add your story idea."
+    validations:
+      required: true
+
+  - type: textarea
+    id: subtasks
+    attributes:
+      label: Subtasks
+      description: Possible subtasks or variations of the task.
+
   - type: input
     id: spoiler-begin
     attributes:
       label: "---"
-      description: Opening the spoiler tag
+      description: "No change is required: Opening the spoiler tag to hide solution and topic ideas, preventing accidental spoiling."
       placeholder: <details><summary>Topic Tags</summary>
       value: <details><summary>Topic Tags</summary>
+
   - type: dropdown
     id: round
     attributes:
@@ -117,39 +136,29 @@ body:
         - trivial
         - union find
         - warmup
+      default: 2
+  - type: input
+    id: topics-freeform
+    attributes:
+      label: "Topics (free-form)"
+      description: "Additional topics that are not available in the dropdown."
     validations:
       required: false
-  - type: input
-    id: spoiler-end
-    attributes:
-      label: "---"
-      description: Closing the spoiler tag
-      placeholder: </details>
-      value: </details>
+
   - type: markdown
     attributes:
       value: |
         ### Rounds
-        Which rounds would this task be applicable?
+        In which rounds would this task be applicable?
         Choose the corresponding *round* label(s) for this issue on the right.
+
   - type: markdown
     attributes:
       value: |
         ### Difficulty
         How would you rate the difficulty of this task?  Relative to the highest round you selected.
         Choose the corresponding *difficulty* label for this issue on the right.
-  - type: textarea
-    id: task
-    attributes:
-      label: Task description
-      description: "Formal problem statement.  Optional: Add your story idea."
-    validations:
-      required: true
-  - type: textarea
-    id: subtasks
-    attributes:
-      label: Subtasks
-      description: Possible subtasks or variations of the task.
+
   - type: textarea
     id: solution
     attributes:
@@ -157,3 +166,11 @@ body:
       description: Solution idea or possible approaches.  You don't need to have a full solution to propose a task, but please write down a few thoughts about how you would approach the task.
     validations:
       required: true
+
+  - type: input
+    id: spoiler-end
+    attributes:
+      label: "---"
+      description: "No change is required: Closing the spoiler tag"
+      placeholder: </details>
+      value: </details>