feat: professional repo cleanup + community infrastructure

- README: remove Recent Updates section, clean roadmap (pending only),
  replace Screenshots with demo link, add 6 new badges (stars, last
  commit, contributors, discussions, CI), invite GIF contributions
- CHANGELOG: translate all Italian entries to English, add v1.7.13
  (DB fresh-install crash fix)
- database.php: add missing 'undone' column to transactions schema;
  wrap ALTER TABLE calls in try/catch to prevent race-condition errors
  on concurrent first requests
- Wiki: Android-Kiosk v1.5.0 → v1.6.0, Step 5 rewritten (BLE scan,
  no external APK), removed gateway troubleshooting section
- Wiki: Scale-Gateway promoted to deprecated with redirect banner
- Wiki: Home What's New updated to v1.7.12 / v1.7.13
- Wiki: Features.md, kiosk README Italian UI strings translated
- .github: add bug_report.yml, feature_request.yml issue templates,
  config.yml (blank issues off, links to FAQ/Discussions/Security),
  PULL_REQUEST_TEMPLATE.md with checklist
- .github: FUNDING.yml (Ko-fi), dependabot.yml (monthly action updates)
- .github/workflows/security.yml: Trivy docker + fs scan, SARIF upload
- .github/workflows/build-scale-gateway.yml: disabled (deprecated)
- SECURITY.md: responsible disclosure policy, supported versions, scope
- CODE_OF_CONDUCT.md: Contributor Covenant 2.1
- Settings UI: About section with version display, Report Bug button,
  Changelog and GitHub links; reportBugManual() + _loadAboutSection()
- Translations: added 'about' key group (9 keys × 3 languages)

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,68 @@
+name: Feature Request
+description: Suggest a new feature or improvement
+title: "[FEATURE] "
+labels: ["enhancement"]
+assignees: ["dadaloop82"]
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for the idea! Check the [Roadmap](https://github.com/dadaloop82/EverShelf/blob/main/README.md#-roadmap) and [Discussions](https://github.com/dadaloop82/EverShelf/discussions) first — it may already be planned or discussed.
+
+  - type: dropdown
+    id: category
+    attributes:
+      label: Category
+      options:
+        - Inventory management
+        - Shopping list
+        - AI / Gemini features
+        - Cooking mode
+        - Dashboard / stats
+        - Kiosk app
+        - Smart Scale
+        - Integrations (Bring!, HA, etc.)
+        - Performance / developer experience
+        - Translations / i18n
+        - Other
+    validations:
+      required: true
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem / Motivation
+      description: What pain point does this address? Why do you need this?
+      placeholder: "I'm always frustrated when..."
+    validations:
+      required: true
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed Solution
+      description: Describe what you'd like to see added or changed.
+    validations:
+      required: true
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives Considered
+      description: Any workarounds you've tried, or other solutions you considered?
+
+  - type: textarea
+    id: context
+    attributes:
+      label: Additional Context
+      description: Screenshots, mockups, links to similar features in other apps, etc.
+
+  - type: checkboxes
+    id: checklist
+    attributes:
+      label: Checklist
+      options:
+        - label: I checked the Roadmap and this is not already planned
+          required: true
+        - label: I searched existing issues and discussions — this is not a duplicate
+          required: true