ci: replace GitHub Issue Markdown templates with YAML forms

.github/ISSUE_TEMPLATE/bug_report.md

@@ -1,10 +0,0 @@
----
-name: Bug report
-about: Create a bug report
-title: ''
-labels: bug, triage needed
-assignees: ''
-
----
-
-

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: "Bug Report"
+description: "Report a bug or unexpected behavior"
+title: "[Bug]: "
+type: "Bug"
+labels: ["triage needed"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for reporting a bug! Please provide detailed information to help us reproduce and fix the issue.
+
+  - type: input
+    id: summary
+    attributes:
+      label: "Bug Summary"
+      description: "Briefly describe the bug."
+      placeholder: "e.g., Error when saving a new entry"
+    validations:
+      required: true
+
+  - type: textarea
+    id: description
+    attributes:
+      label: "Description"
+      description: "A clear and concise description of the bug."
+      placeholder: "e.g., When I click 'Save', I get a 500 error."
+    validations:
+      required: true
+
+  - type: textarea
+    id: steps_to_reproduce
+    attributes:
+      label: "Steps to Reproduce"
+      description: "Steps to reproduce the behavior."
+      placeholder: |
+        1. Go to '...'
+        2. Click on '...'
+        3. Scroll down to '...'
+        4. See error
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected_behavior
+    attributes:
+      label: "Expected Behavior"
+      description: "What should happen instead?"
+      placeholder: "e.g., The form should be saved successfully."
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual_behavior
+    attributes:
+      label: "Actual Behavior"
+      description: "What actually happens?"
+      placeholder: "e.g., A 500 error is returned with no useful error message."
+    validations:
+      required: true
+
+  - type: input
+    id: version
+    attributes:
+      label: "Version"
+      description: "Which version of Miniflux are you using?"
+      placeholder: "e.g., 2.2.6"
+    validations:
+      required: true
+
+  - type: input
+    id: browser
+    attributes:
+      label: "Browser"
+      description: "If applicable, which browser are you using? Please provide the version."
+      placeholder: "e.g., Chrome, Firefox, Safari"
+    validations:
+      required: false
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: "Relevant Logs or Error Output"
+      description: "Paste any relevant logs or error messages (if applicable)."
+      render: shell
+      placeholder: "e.g., Stack trace, log files, browser console logs, or console output"
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional_context
+    attributes:
+      label: "Additional Context"
+      description: "Add any other context about the problem here."
+      placeholder: "e.g., Screenshots, video recordings, or related issues"
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: agreement
+    attributes:
+      label: "Checklist"
+      description: "Please confirm the following:"
+      options:
+        - label: "I have searched existing issues to ensure this bug hasn't been reported before."
+          required: true

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,10 +0,0 @@
----
-name: Feature request
-about: Suggest an idea for this project
-title: ''
-labels: wishlist
-assignees: ''
-
----
-
-- [ ] I have read this document: https://miniflux.app/opinionated.html#feature-request

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,65 @@
+name: "Feature Request"
+description: "Suggest an idea or improvement for the project"
+title: "[Feature]: "
+type: "Feature"
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to suggest a feature! Please provide detailed information to help us understand and evaluate your idea.
+
+  - type: input
+    id: summary
+    attributes:
+      label: "Feature Summary"
+      description: "Briefly describe the feature or enhancement."
+      placeholder: "e.g., Add dark mode support"
+    validations:
+      required: true
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: "What problem does this feature solve?"
+      description: "Explain the problem or limitation this feature would address."
+      placeholder: "e.g., It's difficult to use the app in low-light environments."
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: "Proposed Solution"
+      description: "Describe how you think this feature should work."
+      placeholder: "e.g., Add a toggle in settings to switch between light and dark mode."
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: "Alternatives Considered"
+      description: "Have you considered other solutions or workarounds?"
+      placeholder: "e.g., Using browser extensions to force dark mode."
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional_context
+    attributes:
+      label: "Additional Context"
+      description: "Add any other context, screenshots, or examples to explain your request."
+      placeholder: "e.g., A screenshot of a similar feature in another project."
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: agreement
+    attributes:
+      label: "Checklist"
+      description: "Please confirm the following:"
+      options:
+        - label: "I have searched existing issues to ensure this feature hasn't been requested before."
+          required: true
+        - label: "I understand that feature requests are not guaranteed to be implemented."
+          required: true

.github/ISSUE_TEMPLATE/feed-problems.md

@@ -1,10 +0,0 @@
----
-name: Feed Problems
-about: Problems with a feed or a website
-title: ''
-labels: feed problems, triage needed
-assignees: ''
-
----
-
-

.github/ISSUE_TEMPLATE/feed_issue.yml

@@ -0,0 +1,84 @@
+name: "Feed/Website Issue"
+description: "Report problems with a specific feed or website"
+title: "[Feed Issue]: "
+type: "Feed Issue"
+labels: ["triage needed"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for reporting an issue with a feed or website! Please provide detailed information to help us diagnose and resolve the problem.
+
+  - type: input
+    id: feed_url
+    attributes:
+      label: "Feed URL"
+      description: "Provide the URL of the feed that is not working correctly."
+      placeholder: "e.g., https://example.com/feed.xml"
+    validations:
+      required: true
+
+  - type: input
+    id: website_url
+    attributes:
+      label: "Website URL"
+      description: "Provide the URL of the website."
+      placeholder: "e.g., https://example.com"
+    validations:
+      required: true
+
+  - type: textarea
+    id: problem_description
+    attributes:
+      label: "Problem Description"
+      description: "Describe the issue you are experiencing with this feed."
+      placeholder: |
+        e.g.,
+        - The feed URL returns a 403 error.
+        - The content is malformed.
+        - Images are not loading in the web ui.
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected_behavior
+    attributes:
+      label: "Expected Behavior"
+      description: "Describe what you expect to happen."
+      placeholder: "e.g., The feed should show the images correctly."
+    validations:
+      required: true
+
+  - type: textarea
+    id: error_logs
+    attributes:
+      label: "Relevant Logs or Error Output"
+      description: "Paste any relevant logs or error messages, if available."
+      render: shell
+      placeholder: "e.g., HTTP error codes, invalid XML warnings, etc."
+    validations:
+      required: false
+
+  - type: textarea
+    id: additional_context
+    attributes:
+      label: "Additional Context"
+      description: "Add any other context, screenshots, or related information to help us troubleshoot."
+      placeholder: "e.g., Is this a recurring problem? Did the feed work before?"
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: troubleshooting
+    attributes:
+      label: "Troubleshooting Steps"
+      description: "Please confirm that you have tried the following:"
+      options:
+        - label: "I have checked if the feed URL is correct and accessible in a web browser."
+          required: true
+        - label: "I have checked if the feed URL is correct and accessible with `curl`."
+          required: true
+        - label: "I have verified that the feed is valid using an RSS/Atom validator."
+          required: false
+        - label: "I have searched for existing issues to avoid duplicates."
+          required: true

.github/ISSUE_TEMPLATE/proposal.yml

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+name: "Proposal / RFC"
+description: "Propose a significant change, or architectural decision"
+title: "[Proposal]: "
+type: "Proposal"
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to submit a proposal! Please provide detailed information to ensure a productive discussion.
+
+  - type: input
+    id: summary
+    attributes:
+      label: "Proposal Summary"
+      description: "A brief summary of the proposed change or idea."
+      placeholder: "e.g., Refactor database schema for performance optimization"
+    validations:
+      required: true
+
+  - type: textarea
+    id: motivation
+    attributes:
+      label: "Motivation and Context"
+      description: "Explain the problem this proposal addresses. Why is it necessary? What are the current limitations or pain points?"
+      placeholder: |
+        e.g.,
+        - The current database schema causes performance bottlenecks when querying large datasets.
+        - Adding this feature will improve scalability and reliability for large-scale use cases.
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposed_solution
+    attributes:
+      label: "Proposed Solution"
+      description: "Describe the proposed solution or approach. Include technical details, diagrams, and examples where possible."
+      placeholder: |
+        e.g.,
+        - Redesign the schema to normalize tables and introduce indexing.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: "Alternatives Considered"
+      description: "List any alternative approaches that were considered and explain why they were rejected."
+      placeholder: |
+        e.g.,
+        - Use Redis for caching, but it adds operational complexity.
+        - Stick with the current schema and optimize queries, but this has limited impact on performance.
+    validations:
+      required: false
+
+  - type: textarea
+    id: impact
+    attributes:
+      label: "Impact and Risks"
+      description: "Describe the potential impact of this change. Highlight possible risks and backward compatibility concerns."
+      placeholder: |
+        e.g.,
+        - May require data migration with downtime.
+        - Could introduce breaking changes in API responses.
+        - Affects core functionality, requiring extensive testing.
+    validations:
+      required: true
+
+  - type: textarea
+    id: additional_context
+    attributes:
+      label: "Additional Context or References"
+      description: "Add any relevant context, links to related discussions, RFCs, or design documents."
+      placeholder: "e.g., Links to research, GitHub issues, or similar projects"
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: agreement
+    attributes:
+      label: "Checklist"
+      description: "Please confirm the following:"
+      options:
+        - label: "I have reviewed existing proposals to ensure this change hasn't been proposed before."
+          required: true
+        - label: "I agree to provide follow-up updates and maintain discussion on this proposal."
+          required: true