v1.3.0: Refactoring Phase 3+4, Symbol-Verwaltung Redesign, Schlauch-Labels Fix

- Refactoring: Error Boundaries, apiFetch Wrapper, Socket Status-Tracking
- Refactoring: UI Kontrast (theme-aware colors), unused imports bereinigt
- Symbol-Verwaltung: Neues Split-Panel (Meine Symbole + Bibliothek)
- Symbol-Verwaltung: Umbenennen (TLF rot/blau), Duplikate erlaubt
- Symbol-Verwaltung: Karten-Sidebar zeigt eigene Symbole bevorzugt
- Schlauch-Labels: Groessere Schrift (13px/10px), verschiebbar (Drag)
- Schema: TenantSymbol customName, sortOrder, unique constraint entfernt
- Open Source Referenz entfernt (kostenloses Projekt)

src/stores/project-store.ts

@@ -0,0 +1,69 @@
+import { create } from 'zustand'
+import type { Project, Feature, JournalEntry } from '@/types'
+
+interface ProjectStore {
+  // Projekt-Daten
+  project: Project | null
+  features: Feature[] // Karten-Elemente (Symbole, Linien, Polygone)
+  journalEntries: JournalEntry[]
+
+  // Actions
+  setProject: (project: Project | null) => void
+  setFeatures: (features: Feature[]) => void
+  addFeature: (feature: Feature) => void
+  updateFeature: (id: string, updates: Partial<Feature>) => void
+  removeFeature: (id: string) => void
+  
+  setJournalEntries: (entries: JournalEntry[]) => void
+  addJournalEntry: (entry: JournalEntry) => void
+
+  // Realtime-Sync Actions (werden von Socket.io getriggert)
+  syncFeatures: (features: Feature[]) => void
+  syncJournalEntry: (entry: JournalEntry) => void
+}
+
+export const useProjectStore = create<ProjectStore>((set) => ({
+  project: null,
+  features: [],
+  journalEntries: [],
+
+  setProject: (project) => set({ project }),
+  
+  setFeatures: (features) => set({ features }),
+  
+  addFeature: (feature) => set((state) => ({ 
+    features: [...state.features, feature] 
+  })),
+  
+  updateFeature: (id, updates) => set((state) => ({
+    features: state.features.map(f => 
+      f.id === id || f.properties?.id === id 
+        ? { ...f, properties: { ...f.properties, ...updates } } 
+        : f
+    )
+  })),
+  
+  removeFeature: (id) => set((state) => ({
+    features: state.features.filter(f => f.id !== id && f.properties?.id !== id)
+  })),
+
+  setJournalEntries: (entries) => set({ journalEntries: entries }),
+  
+  addJournalEntry: (entry) => set((state) => ({
+    journalEntries: [...state.journalEntries, entry]
+  })),
+
+  syncFeatures: (features) => set({ features }),
+  
+  syncJournalEntry: (entry) => set((state) => {
+    // Avoid duplicates
+    if (state.journalEntries.some(e => e.id === entry.id)) {
+      return {
+        journalEntries: state.journalEntries.map(e => e.id === entry.id ? entry : e)
+      }
+    }
+    return {
+      journalEntries: [...state.journalEntries, entry]
+    }
+  }),
+}))