feat: add standard issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: "Bug Report"
+about: "Report a bug in the OrbitStream Frontend"
+title: "[BUG] "
+labels: ["bug", "needs-triage"]
+assignees: ""
+---
+
+# Bug Report
+
+## 🔍 Is this a regression?
+
+<!-- Did this work before and now it's broken? If so, which version last worked? -->
+
+## 📝 Description
+
+<!-- A clear and concise description of what the bug is. -->
+
+## 🔄 Steps to Reproduce
+
+1. 
+2. 
+3. 
+
+## ✅ Expected Behavior
+
+<!-- What you expected to happen. -->
+
+## ❌ Actual Behavior
+
+<!-- What actually happened. Include screenshots if possible. -->
+
+## 🌍 Environment
+
+- **OS**: [e.g., Ubuntu 22.04, macOS 14]
+- **Browser**: [e.g., Chrome 120, Firefox 121, Safari 17]
+- **Device**: [e.g., Desktop, iPhone 15, Pixel 8]
+- **Node.js version**: [e.g., 20.11.0]
+- **OrbitStream Frontend version**: [e.g., commit hash or version tag]
+- **Stellar network**: [testnet / mainnet]
+
+## 📋 Configuration
+
+<!-- Paste relevant env vars (REDACT secrets). -->
+
+```env
+NEXT_PUBLIC_API_URL=
+NEXT_PUBLIC_STELLAR_NETWORK=
+```
+
+## 📸 Screenshots / Screen Recording
+
+<!-- If applicable, add screenshots or a screen recording showing the bug. -->
+
+## 📱 Mobile-Specific
+
+<!-- If the bug is mobile-specific, include device info and whether it's responsive or a native-like issue. -->
+
+- **Viewport size**: [e.g., 375x812 (iPhone 14)]
+- **Responsive breakpoint**: [mobile / tablet / desktop]
+
+## 🔍 Console Errors
+
+<!-- Paste any browser console errors. -->
+
+```
+[Paste console errors here]
+```
+
+## 🧪 Test Case
+
+<!-- If possible, provide a minimal reproduction (CodeSandbox, StackBlitz, or local steps). -->
+
+## 📎 Additional Context
+
+<!-- Any other context about the problem. -->
+
+## ✅ Checklist
+
+- [ ] I have searched existing issues and this is not a duplicate
+- [ ] I have tested on the latest version of the frontend
+- [ ] I have included browser/device information
+- [ ] I have redacted secrets and sensitive information

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+  - name: Documentation
+    url: https://github.com/your-org/OrbitStream/blob/main/orbitstream_docs/README.md
+    about: Read the OrbitStream documentation before opening an issue
+  - name: Security Vulnerability
+    url: https://github.com/your-org/OrbitStream/security/advisories/new
+    about: Report security vulnerabilities privately

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: "Feature Request"
+about: "Suggest a new feature or enhancement for the OrbitStream Frontend"
+title: "[FEAT] "
+labels: ["enhancement", "needs-triage"]
+assignees: ""
+---
+
+# Feature Request
+
+## 📝 Summary
+
+<!-- A clear, one-sentence summary of the feature you want. -->
+
+## 🎯 Problem Statement
+
+<!-- What problem does this feature solve? Why is it needed? -->
+
+## 💡 Proposed Solution
+
+<!-- Describe your ideal solution. Be as specific as possible. -->
+
+## 🔄 Alternatives Considered
+
+<!-- Have you considered other approaches? Why is your preferred solution better? -->
+
+## 📋 Acceptance Criteria
+
+<!-- How will we know this feature is complete? List specific, testable criteria. -->
+
+- [ ] Criterion 1
+- [ ] Criterion 2
+- [ ] Criterion 3
+
+## 🏗️ Implementation Notes
+
+<!-- Any technical details, component design ideas, or UI considerations. -->
+
+### Component Design (if applicable)
+
+```tsx
+// Example component API
+```
+
+### Affected Pages/Components
+
+- [ ] Landing Page (`/`)
+- [ ] Checkout Page (`/checkout/[sessionId]`)
+- [ ] Merchant Dashboard (`/merchant`)
+- [ ] Merchant Settings (`/merchant/settings`)
+- [ ] Components (checkout/*, ui/*)
+- [ ] Hooks (useWallet, useCheckout)
+- [ ] Libraries (lib/*)
+- [ ] Other: ___
+
+## 📎 Related Issues/PRs
+
+<!-- Link any related issues, PRs, or discussions. -->
+
+## 📋 Additional Context
+
+<!-- Any other context, mockups, or references. -->
+
+## ✅ Checklist
+
+- [ ] I have searched existing issues and this is not a duplicate
+- [ ] I have clearly described the problem this feature solves
+- [ ] I have provided acceptance criteria