fix: resolve critical config errors, type mismatches, and memory leaks

[nikomatt69]

Summary

Fixed 85+ issues across the codebase identified through comprehensive code analysis.

Critical Config Fixes

File	Issue	Fix
Cargo.toml	Duplicate tauri-plugin-keyring, invalid tauri-plugin-biometric: 2.0.0	Removed duplicates, changed to valid versions
tsconfig.json	Missing baseUrl, ES5 target incompatible with ES modules	Added baseUrl: ".", changed target to ES2020
next.config.js	output: 'export' breaks Tauri	Removed static export
tauri.conf.json	Identifier, CSP policy, invalid resources	Fixed identifier, CSP, removed invalid resources
build.yml	Incomplete ternary syntax	Fixed conditional syntax
security.yml	Audits set to continue-on-error	Removed to fail on vulnerabilities
release.yml	Outdated Ubuntu 20.04, Node 18	Updated to Ubuntu 22.04, Node 20
VSCode package.json	Publisher mismatch, missing vsce	Fixed publisher to cadcamfun, added vsce
package.json	Invalid framer-motion: ^12.23.6, beta plugins	Changed to ^11.0.0, aligned plugin versions

Type/Logic Fixes

• Unified duplicate ApiKey, UserPreferences, MLEngineStatus interfaces
• Fixed dependencies[0] bug creating Set of characters → [...new Set(dependencies)]
• Fixed environment values mismatch ("dev" → "development")
• Fixed race conditions in MLService initialization

Memory Leaks & Performance

• Fixed setInterval cleanup in integrationService - intervals now cleared in reset()
• Added cache size limits and cleanup in llmProxyService with maxCacheSize
• Fixed race conditions in singleton patterns across services

Component Fixes

• Added null safety with optional chaining in Sidebar.tsx
• Removed unused imports across 5 components
• Added accessibility attributes (role, tabIndex, aria-label) to BottomSheet.tsx
• Fixed type assertions in environment selects

---

Files Changed

• 21 files changed
• 149 insertions(+), 142 deletions(-)