chore: add github issue templates

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug report
+description: Report a reproducible problem in fluxer
+title: 'bug: '
+labels: ['bug']
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for the report!
+
+        **Security note:** Please do not report security issues here. Use https://fluxer.app/security instead.
+
+        Before filing, please check for existing issues and include enough detail for someone else to reproduce.
+  - type: textarea
+    id: summary
+    attributes:
+      label: Summary
+      description: What happened, in one or two sentences?
+      placeholder: 'When I ..., the app ..., but I expected ...'
+    validations:
+      required: true
+
+  - type: textarea
+    id: repro
+    attributes:
+      label: Steps to reproduce
+      description: Provide clear, numbered steps. Include any relevant data/inputs.
+      placeholder: |
+        1. Go to ...
+        2. Click ...
+        3. See error ...
+    validations:
+      required: true
+
+  - type: textarea
+    id: expected
+    attributes:
+      label: Expected behavior
+      placeholder: 'It should ...'
+    validations:
+      required: true
+
+  - type: textarea
+    id: actual
+    attributes:
+      label: Actual behavior
+      placeholder: 'Instead, it ...'
+    validations:
+      required: true
+
+  - type: dropdown
+    id: area
+    attributes:
+      label: Area
+      description: Where does this bug appear?
+      options:
+        - Backend / API
+        - Frontend / Web
+        - Mobile
+        - CLI / tooling
+        - CI / build
+        - Docs
+        - Not sure
+    validations:
+      required: true
+
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: Include versions that matter (commit SHA/tag, OS, runtime, browser/device).
+      placeholder: |
+        - Commit/Tag:
+        - OS:
+        - Runtime (node/go/python/etc):
+        - Browser (if applicable):
+        - Deployment (local/dev/prod):
+    validations:
+      required: true
+
+  - type: textarea
+    id: logs
+    attributes:
+      label: Logs / screenshots
+      description: Paste logs (redact secrets) and/or attach screenshots/recordings.
+      placeholder: 'Paste stack traces, console output, network errors, etc.'
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: checks
+    attributes:
+      label: Pre-flight checks
+      options:
+        - label: I searched for existing issues and didn't find a duplicate.
+          required: true
+        - label: This is not a security vulnerability report (those go to https://fluxer.app/security).
+          required: true
+        - label: I included enough information to reproduce the issue.
+          required: true

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Security vulnerability report
+    url: https://fluxer.app/security
+    about: Please report security issues privately using our security policy.

.github/ISSUE_TEMPLATE/docs.yml

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+name: Documentation
+description: Report a docs issue or suggest an improvement
+title: 'docs: '
+labels: ['docs']
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks! Clear docs save everyone time.
+
+        **Security note:** Please do not report security issues here. Use https://fluxer.app/security instead.
+  - type: textarea
+    id: issue
+    attributes:
+      label: What's wrong or missing?
+      description: Describe the docs gap, error, ambiguity, or outdated info.
+      placeholder: 'The README says ..., but actually ...'
+    validations:
+      required: true
+
+  - type: textarea
+    id: location
+    attributes:
+      label: Where is it?
+      description: Link the file/section if possible.
+      placeholder: "File: ...\nSection/heading: ...\nLink: ..."
+    validations:
+      required: false
+
+  - type: textarea
+    id: suggestion
+    attributes:
+      label: Suggested improvement (optional)
+      description: If you already know how it should read, propose wording.
+      placeholder: 'Proposed text: ...'
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: checks
+    attributes:
+      label: Pre-flight checks
+      options:
+        - label: I searched for existing issues and didn't find a duplicate.
+          required: true

.github/ISSUE_TEMPLATE/feature_request.yml

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+name: Feature request
+description: Suggest an improvement or new capability
+title: 'feat: '
+labels: ['enhancement']
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to propose an improvement.
+
+        If this is **larger work** (new feature, meaningful refactor, new dependency, new API surface, behavior change),
+        it's best to align with maintainers early; an issue like this is a great place to do that.
+
+        **Security note:** Please do not report security issues here. Use https://fluxer.app/security instead.
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem / motivation
+      description: What problem are you trying to solve? Who is it for?
+      placeholder: "Right now, users can't ..., which causes ..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: proposal
+    attributes:
+      label: Proposed solution
+      description: What would you like to see happen? Include UX/API shape if relevant.
+      placeholder: 'Add ..., so that ...'
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives considered
+      description: Other approaches you considered, and why they're worse.
+      placeholder: "- Option A: ...\n- Option B: ..."
+    validations:
+      required: false
+
+  - type: dropdown
+    id: impact
+    attributes:
+      label: Impact
+      description: Roughly how big is this change?
+      options:
+        - Small (localized, low risk)
+        - Medium (touches multiple areas)
+        - Large (new surface area / refactor / dependency)
+        - Not sure
+    validations:
+      required: true
+
+  - type: checkboxes
+    id: compatibility
+    attributes:
+      label: Compatibility
+      options:
+        - label: This might be a breaking change (behavior/API).
+          required: false
+        - label: This introduces a new dependency.
+          required: false
+
+  - type: textarea
+    id: scope
+    attributes:
+      label: Scope / implementation notes
+      description: Constraints, rough plan, or links to relevant code.
+      placeholder: "Notes: ...\nPotential files/areas: ..."
+    validations:
+      required: false
+
+  - type: checkboxes
+    id: contribution
+    attributes:
+      label: Contribution
+      options:
+        - label: I'm willing to open a PR for this (after maintainer alignment).
+          required: false
+        - label: I can help test/verify a PR for this.
+          required: false