Replace Redux with Zustand for state management

[Copilot]

This PR completes the migration from Redux to Zustand for state management in the CityEnergyAnalyst-GUI application, significantly simplifying the codebase and reducing boilerplate.

What Changed

✅ Core Migration Complete

• Main application now runs entirely on Zustand - replaced Redux for tools, jobs, navigation, and routing
• Created 4 new Zustand stores:
  • toolsStore.js - handles tool list, parameters, and saving state
  • jobsStore.js - manages job creation, updates, and deletion
  • navigationStore.js - replaces connected-react-router for routing
  • databaseEditorStore.js - Zustand equivalent (not yet used)

🔧 Component Migrations

Migrated 15+ components from Redux to Zustand:

• Tools: Tool.jsx
• Jobs: JobInfoList.jsx, JobInfoCard.jsx
• Project: ScenarioRow.jsx, Toolbar.jsx, BottomToolButtons.jsx
• Core: App.jsx, HomePage.jsx, main.jsx, StatusBar.jsx
• Utils: hooks.jsx, ValidationErrors.jsx

🗑️ Cleanup & Dependencies

• Removed major Redux dependencies: connected-react-router, redux-logger
• Deleted unused files: old store configs, actions, reducers (8 files removed)
• Kept minimal Redux: Only for 6 DatabaseEditor components (isolated setup)

Before vs After

Before: Complex Redux setup with actions, reducers, middleware, and connected-react-router

// Redux pattern - lots of boilerplate
const mapStateToProps = (state) => ({ tools: state.toolList.tools });
const mapDispatchToProps = (dispatch) => ({ fetchTools: () => dispatch(fetchToolList()) });

After: Simple Zustand stores with direct state access

// Zustand pattern - clean and simple
const { tools, fetchToolList } = useToolsStore();
useEffect(() => { fetchToolList(); }, []);

Architecture

• Main App: 100% Zustand (tools, jobs, navigation, projects, users, maps, etc.)
• DatabaseEditor: Isolated minimal Redux store (6 components)
• Clean separation: No conflicts between the two state management systems

Benefits

• ✅ Less boilerplate - eliminated actions/reducers pattern
• ✅ Smaller bundle size - removed unnecessary Redux dependencies
• ✅ Simpler debugging - direct state access instead of time-travel debugging
• ✅ Better TypeScript support - Zustand has excellent TS integration
• ✅ Async built-in - no need for redux-thunk or similar middleware
• ✅ Modern React patterns - hooks-based API

Testing

• ✅ All builds pass successfully
• ✅ No breaking changes to existing functionality
• ✅ Core features (tools, jobs, navigation) working correctly
• ✅ DatabaseEditor still functional with isolated Redux

Fixes #162.

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