feat: Add shared components, refactor stores, improve data-entry workflow

Shared Components:
- Add CompanySelector.vue and PeriodSelector.vue components
- Add AppHeader.vue and SlideMenu.vue layout components
- Add shared stores factories (companies.js, accountingPeriod.js)
- Add shared routes factories (companies.py, calendar.py)
- Add shared models (company.py, calendar.py)
- Add shared layout styles (header.css, navigation.css)

Data Entry App:
- Update CLAUDE.md with prod/test server documentation
- Improve nomenclature sync service with better error handling
- Update receipts router and CRUD operations
- Add company/period stores using shared factories
- Update App.vue layout with shared components
- Fix OCRUploadZone file handling

Reports App:
- Refactor stores to use shared factories
- Update App.vue to use shared layout components

Infrastructure:
- Replace start-data-entry.sh with separate dev/test scripts
- Add .claude/rules for authentication, backend patterns, etc.
- Add implementation plan for OCR receipt improvements
- Clean up old documentation files

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

shared/frontend/components/layout/SlideMenu.vue

@@ -0,0 +1,101 @@
+<template>
+  <div>
+    <!-- Menu Overlay -->
+    <div
+      class="slide-menu-overlay"
+      :class="{ open: isOpen }"
+      @click="$emit('close')"
+    ></div>
+
+    <!-- Slide Menu -->
+    <nav class="slide-menu" :class="{ open: isOpen }">
+      <!-- Dynamic Menu Sections -->
+      <div
+        v-for="section in menuItems"
+        :key="section.title"
+        class="menu-section"
+      >
+        <h3 class="menu-title">{{ section.title }}</h3>
+        <ul class="menu-list">
+          <li
+            v-for="item in section.items"
+            :key="item.to"
+            class="menu-item"
+          >
+            <router-link
+              :to="item.to"
+              class="menu-link"
+              :class="{ active: isRouteActive(item.to) }"
+              @click="$emit('close')"
+            >
+              <i :class="['menu-icon', item.icon]"></i>
+              <span>{{ item.label }}</span>
+              <span v-if="item.badge" class="menu-badge">{{ item.badge }}</span>
+            </router-link>
+          </li>
+        </ul>
+      </div>
+
+      <!-- Profile Section (at bottom) -->
+      <div class="menu-section menu-profile">
+        <div class="profile-info">
+          <i class="pi pi-user"></i>
+          <span>{{ currentUser?.username || 'Utilizator' }}</span>
+        </div>
+        <ul class="menu-list">
+          <slot name="profile-items"></slot>
+          <li class="menu-item">
+            <a href="#" class="menu-link" @click.prevent="handleLogout">
+              <i class="menu-icon pi pi-sign-out"></i>
+              <span>Deconectare</span>
+            </a>
+          </li>
+        </ul>
+      </div>
+    </nav>
+  </div>
+</template>
+
+<script>
+import { useRoute } from "vue-router";
+
+export default {
+  name: "SlideMenu",
+  props: {
+    // Is menu open?
+    isOpen: {
+      type: Boolean,
+      default: false,
+    },
+    // Menu items configuration
+    // Format: [{ title: 'Section', items: [{ to: '/path', icon: 'pi pi-icon', label: 'Label', badge: null }] }]
+    menuItems: {
+      type: Array,
+      default: () => [],
+    },
+    // Current user object
+    currentUser: {
+      type: Object,
+      default: null,
+    },
+  },
+  emits: ["close", "logout"],
+  setup(props, { emit }) {
+    const route = useRoute();
+
+    const isRouteActive = (path) => {
+      return route.path === path;
+    };
+
+    const handleLogout = () => {
+      emit("logout");
+      emit("close");
+    };
+
+    return {
+      isRouteActive,
+      handleLogout,
+    };
+  },
+};
+</script>