chore(issues): point the issue chooser at this repo, not upstream Cinny

The forked-in Cinny issue setup funneled reporters to the upstream project:
- config.yml disabled blank issues and linked to cinnyapp/cinny GitHub
  Discussions
- preapproved.md was Cinny's "do not open an issue, use Discussions"
  template (Gitea has no Discussions anyway)

Replace it with a Lotus setup: enable blank issues, drop the upstream
contact link, and add Bug Report + Feature Request templates. Now
/issues/new/choose offers Lotus templates and files against this repo.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,27 @@
+---
+name: Bug Report
+about: Report something that isn't working in Lotus Chat
+title: ''
+labels: bug
+---
+
+**Describe the bug**
+A clear and concise description of what went wrong.
+
+**Steps to reproduce**
+
+1. Go to '...'
+2. Click on '...'
+3. See error
+
+**Expected behavior**
+What you expected to happen instead.
+
+**Client info**
+
+- Lotus Chat version (Settings → Help & About):
+- Platform: Web / Desktop (Windows / macOS / Linux)
+- Browser + version (if web):
+
+**Screenshots / logs**
+If applicable, add screenshots or the browser devtools console output.

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1 @@
-blank_issues_enabled: false
+blank_issues_enabled: true
-contact_links:
-  - name: Features, Bug Reports, Questions
-    url: https://github.com/cinnyapp/cinny/discussions/new/choose
-    about: Our preferred starting point if you have any questions or suggestions about features or behavior.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,15 @@
+---
+name: Feature Request
+about: Suggest an idea or improvement for Lotus Chat
+title: ''
+labels: enhancement
+---
+
+**What would you like?**
+A clear and concise description of the feature or change.
+
+**Why / use case**
+What problem does it solve, or what does it make better?
+
+**Alternatives considered**
+Any workarounds or other approaches you've thought about.

.github/ISSUE_TEMPLATE/preapproved.md

@@ -1,9 +0,0 @@
----
-name: Pre-Discussed and Approved Topics
-about: |-
-  Only for topics already discussed and approved in the GitHub Discussions section.
----
-
-**DO NOT OPEN A NEW ISSUE. PLEASE USE THE DISCUSSIONS SECTION.**
-
-**I DIDN'T READ THE ABOVE LINE. PLEASE CLOSE THIS ISSUE.**