Strip emoji from docs, fix XSS/hashing vulnerabilities, remediate all failing CI checks (#1)

* Initial plan

* Fix security vulnerabilities: MD5→SHA-256, XSS via dangerouslySetInnerHTML/innerHTML, insecure randomness, CodeQL config

Co-authored-by: TLimoges33 <125313326+TLimoges33@users.noreply.github.com>

* Clean up README: remove decorative emojis for a professional tone

Remove all emojis from section headers, list item prefixes, and
decorative positions. Replace ✅ phase status markers with '(Complete)'
text. Keep the ⭐ in the final call-to-action line. No changes to
links, badges, code blocks, or technical content.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs: remove emoji characters from CONTRIBUTING.md

Remove all emoji from section headers and closing line while
preserving links, code blocks, and technical content.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs: remove emoji characters from documentation files

Remove all emoji characters from 8 documentation files in docs/.
Replace status-marker checkmarks (✅) with '(Done)' text.
Remove decorative emojis from headers and body text entirely.
Preserve emojis inside code blocks unchanged.
Clean up trailing whitespace introduced by removals.

Files modified:
- DEPLOYMENT_GUIDE.md
- IMPLEMENTATION_PLAN.md
- MILESTONE_6_SUMMARY.md
- PRODUCTION_ROADMAP.md
- PROJECT_STATUS.md
- REPOSITORY_ENHANCEMENT.md
- ROADMAP.md
- SECURITY_AUDIT_ROADMAP.md

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* docs: remove emoji characters from documentation files

Remove all emoji characters from 9 markdown files while preserving
code block content (box-drawing characters, indentation). Emojis
removed from headers, list items, and body text across READMEs,
issue templates, PR template, runbook, and mobile docs.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Remove excessive emoji from all documentation for professional presentation

Co-authored-by: TLimoges33 <125313326+TLimoges33@users.noreply.github.com>

* Fix PluginWidget initial state and remove || true from security audit steps

Co-authored-by: TLimoges33 <125313326+TLimoges33@users.noreply.github.com>

* Remediate all failing CI checks: update deprecated actions, fix npm vulnerabilities, fix migrations YAML

Co-authored-by: SynOSdev <257853113+SynOSdev@users.noreply.github.com>

* Fix all remaining CI failures: Node 18→20, fix test API contract, fix pytest version, fix Postgres health checks

Co-authored-by: SynOSdev <257853113+SynOSdev@users.noreply.github.com>

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>
Co-authored-by: TLimoges33 <125313326+TLimoges33@users.noreply.github.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: SynOSdev <257853113+SynOSdev@users.noreply.github.com>

modern/backend/advanced_cache.py

@@ -46,7 +46,7 @@ class AdvancedCacheManager:
     def _generate_cache_key(self, prefix: str, *args, **kwargs) -> str:
         """Generate a consistent cache key from function arguments."""
         key_data = f"{prefix}:{str(args)}:{str(sorted(kwargs.items()))}"
-        return hashlib.md5(key_data.encode()).hexdigest()
+        return hashlib.sha256(key_data.encode()).hexdigest()
     
     async def get(self, key: str) -> Optional[Any]:
         """Get value from cache with fallback strategy."""