feat: Phase 4 - customer posts feed, create, detail, respond

- Add create/close post mutations with auth & ownership verification
- Add getOrCreate chat mutation for handyman response flow
- PostCard component: title, description preview, category badge,
  location, budget, status badge (open=green, closed=red)
- Post detail screen: full description, category, location, budget,
  status, time-ago. Owner: close button. Handyman: respond button
  creates/opens chat with customer
- Create post screen: title, description, category picker, location,
  budget, auth-gated with redirect
- Posts feed: open/all filter tabs, new-post button for customers

All UI text in Macedonian. TypeScript clean, Convex functions deployed.

app/(tabs)/(posts)/index.tsx

@@ -1,20 +1,110 @@
-import { View, Text, ScrollView } from "react-native";
+import { View, Text, ScrollView, Pressable } from "react-native";
+import { useRouter } from "expo-router";
+import { useState } from "react";
+import { useQuery } from "convex/react";
+import { api } from "../../../convex/_generated/api";
+import { useAuth } from "../../_layout";
 import { useTheme } from "../../../components/theme";
+import { PostCard } from "../../../components/post-card";
+import { Loading } from "../../../components/ui/loading";
+
+const TABS = [
+  { key: "open", label: "Отворени" },
+  { key: "all", label: "Сите" },
+] as const;
+
+type TabKey = (typeof TABS)[number]["key"];
 
 export default function PostsScreen() {
+  const router = useRouter();
   const theme = useTheme();
+  const { token, isAuthenticated } = useAuth();
+  const currentUser = useQuery(
+    api.users.getCurrentUser,
+    isAuthenticated && token ? { token } : "skip"
+  );
+  const [activeTab, setActiveTab] = useState<TabKey>("open");
+
+  const posts = useQuery(
+    api.posts.list,
+    activeTab === "open" ? { status: "open" } : {}
+  );
+
+  const isCustomer = currentUser?.role !== "handyman";
 
   return (
-    <ScrollView contentInsetAdjustmentBehavior="automatic" contentContainerStyle={{ padding: theme.spacing.lg }}>
+    <ScrollView
-      <View style={{ alignItems: "center", justifyContent: "center", paddingVertical: 60 }}>
+      contentInsetAdjustmentBehavior="automatic"
-        <Text style={{ fontSize: 48, marginBottom: 16 }}>📋</Text>
+      contentContainerStyle={{ padding: theme.spacing.lg, gap: theme.spacing.md, paddingBottom: 80 }}
-        <Text style={{ fontSize: 18, fontWeight: "600", color: theme.colors.text, marginBottom: 8 }}>
+    >
-          Побарувања
+      {isAuthenticated && isCustomer && (
-        </Text>
+        <Pressable onPress={() => router.push("/post/create" as any)}>
-        <Text style={{ color: theme.colors.textSecondary, textAlign: "center" }}>
+          <View
-          Објавете што ви треба и најдете мајстор кој ќе ви помогне.
+            style={{
+              backgroundColor: theme.colors.primary,
+              borderRadius: theme.radius.md,
+              paddingVertical: 12,
+              paddingHorizontal: theme.spacing.lg,
+              alignItems: "center",
+            }}
+          >
+            <Text style={{ color: "#FFFFFF", fontWeight: "600", fontSize: 16 }}>
+              + Ново побарување
             </Text>
           </View>
+        </Pressable>
+      )}
+
+      <View style={{ flexDirection: "row", backgroundColor: theme.colors.surface, borderRadius: theme.radius.md, padding: 4 }}>
+        {TABS.map((tab) => (
+          <Pressable
+            key={tab.key}
+            onPress={() => setActiveTab(tab.key)}
+            style={{
+              flex: 1,
+              paddingVertical: 10,
+              borderRadius: theme.radius.sm,
+              alignItems: "center",
+              backgroundColor: activeTab === tab.key ? theme.colors.card : "transparent",
+              ...(activeTab === tab.key
+                ? { boxShadow: "0 1px 3px rgba(0,0,0,0.08)" as any }
+                : {}),
+            }}
+          >
+            <Text
+              style={{
+                fontWeight: activeTab === tab.key ? "600" : "400",
+                fontSize: 14,
+                color: activeTab === tab.key ? theme.colors.text : theme.colors.textSecondary,
+              }}
+            >
+              {tab.label}
+            </Text>
+          </Pressable>
+        ))}
+      </View>
+
+      {posts === undefined ? (
+        <Loading />
+      ) : posts.length === 0 ? (
+        <View style={{ alignItems: "center", paddingVertical: 60 }}>
+          <Text style={{ fontSize: 48, marginBottom: 16 }}>📋</Text>
+          <Text style={{ fontSize: 18, fontWeight: "600", color: theme.colors.text, marginBottom: 8 }}>
+            Нема побарувања
+          </Text>
+          <Text style={{ color: theme.colors.textSecondary, textAlign: "center" }}>
+            {activeTab === "open"
+              ? "Нема отворени побарувања во моментот."
+              : "Сеуште нема побарувања."}
+          </Text>
+        </View>
+      ) : (
+        <View style={{ gap: theme.spacing.md }}>
+          {posts.map((post) => (
+            <PostCard key={post._id} post={post} />
+          ))}
+        </View>
+      )}
     </ScrollView>
   );
 }

app/post/[id].tsx

@@ -1,22 +1,155 @@
-import { View, Text, ScrollView } from "react-native";
+import { View, Text, ScrollView, Alert } from "react-native";
-import { useLocalSearchParams, Stack } from "expo-router";
+import { useLocalSearchParams, Stack, useRouter } from "expo-router";
+import { useQuery, useMutation } from "convex/react";
+import { api } from "../../convex/_generated/api";
+import { useAuth } from "../_layout";
 import { useTheme } from "../../components/theme";
+import { Badge } from "../../components/ui/badge";
+import { Button } from "../../components/ui/button";
+import { Card } from "../../components/ui/card";
+import { Loading } from "../../components/ui/loading";
+import { Avatar } from "../../components/ui/avatar";
+import { getCategoryName } from "../../lib/constants";
 
 export default function PostDetailScreen() {
   const { id } = useLocalSearchParams<{ id: string }>();
+  const router = useRouter();
   const theme = useTheme();
+  const { token, userId, isAuthenticated } = useAuth();
+
+  const post = useQuery(api.posts.getById, { id: id as any });
+  const currentUser = useQuery(
+    api.users.getCurrentUser,
+    isAuthenticated && token ? { token } : "skip"
+  );
+
+  const closePost = useMutation(api.posts.close);
+  const getOrCreateChat = useMutation(api.chats.getOrCreate);
+
+  if (!post) {
+    return (
+      <>
+        <Stack.Screen options={{ title: "Побарување", headerShown: true, headerBackButtonDisplayMode: "minimal" }} />
+        <View style={{ flex: 1, justifyContent: "center", alignItems: "center", backgroundColor: theme.colors.background }}>
+          <Loading />
+        </View>
+      </>
+    );
+  }
+
+  const customerId = post.customerId as string;
+  const isOwner = isAuthenticated && userId && customerId === userId;
+  const isHandyman = currentUser?.role === "handyman";
+  const isOpen = post.status === "open";
+
+  async function handleClose() {
+    Alert.alert(
+      "Затвори побарување",
+      "Дали сте сигурни дека сакате да го затворите оваа побарување?",
+      [
+        { text: "Откажи", style: "cancel" },
+        {
+          text: "Затвори",
+          style: "destructive",
+          onPress: async () => {
+            try {
+              await closePost({ token: token!, postId: id as any });
+            } catch (e: any) {
+              Alert.alert("Грешка", e.message || "Неуспешно затворање");
+            }
+          },
+        },
+      ]
+    );
+  }
+
+  async function handleRespond() {
+    try {
+      const chatId = await getOrCreateChat({ token: token!, partnerId: post!.customerId });
+      router.push(`/chat/${chatId}` as any);
+    } catch (e: any) {
+      Alert.alert("Грешка", e.message || "Неуспешно поврзување");
+    }
+  }
+
+  const categoryName = post.category ? getCategoryName(post.category) : null;
+  const timeAgo = getTimeAgo(post.createdAt);
 
   return (
     <>
       <Stack.Screen options={{ title: "Побарување", headerShown: true, headerBackButtonDisplayMode: "minimal" }} />
-      <ScrollView contentInsetAdjustmentBehavior="automatic" contentContainerStyle={{ padding: 16 }}>
+      <ScrollView contentInsetAdjustmentBehavior="automatic" contentContainerStyle={{ padding: theme.spacing.lg, gap: theme.spacing.md, paddingBottom: 100 }}>
-        <View style={{ alignItems: "center", paddingVertical: 60 }}>
+        <View style={{ flexDirection: "row", justifyContent: "space-between", alignItems: "flex-start" }}>
-          <Text style={{ fontSize: 48, marginBottom: 16 }}>📋</Text>
+          <View style={{ flex: 1 }}>
-          <Text style={{ fontSize: 18, fontWeight: "600", color: theme.colors.text }}>
+            <Text style={{ fontSize: 22, fontWeight: "700", color: theme.colors.text }}>
-            Побарување {id}
+              {post.title}
             </Text>
           </View>
+          <Badge label={isOpen ? "Отворено" : "Затворено"} variant={isOpen ? "success" : "error"} />
+        </View>
+
+        <Card>
+          <View style={{ gap: theme.spacing.sm }}>
+            {categoryName && (
+              <View style={{ flexDirection: "row", alignItems: "center", gap: 8 }}>
+                <Text style={{ fontSize: 14, color: theme.colors.textSecondary }}>Категорија:</Text>
+                <Badge label={categoryName} variant="primary" />
+              </View>
+            )}
+            {post.location && (
+              <View style={{ flexDirection: "row", alignItems: "center", gap: 8 }}>
+                <Text style={{ fontSize: 14, color: theme.colors.textSecondary }}>📍 Локација:</Text>
+                <Text style={{ fontSize: 14, color: theme.colors.text }}>{post.location}</Text>
+              </View>
+            )}
+            {post.budget && (
+              <View style={{ flexDirection: "row", alignItems: "center", gap: 8 }}>
+                <Text style={{ fontSize: 14, color: theme.colors.textSecondary }}>💰 Буџет:</Text>
+                <Text style={{ fontSize: 14, fontWeight: "600", color: theme.colors.primary }}>{post.budget}</Text>
+              </View>
+            )}
+            <View style={{ flexDirection: "row", alignItems: "center", gap: 8 }}>
+              <Text style={{ fontSize: 14, color: theme.colors.textSecondary }}>🗓 Објавено:</Text>
+              <Text style={{ fontSize: 14, color: theme.colors.text }}>{timeAgo}</Text>
+            </View>
+          </View>
+        </Card>
+
+        <Card>
+          <Text style={{ fontSize: 16, color: theme.colors.text, lineHeight: 24 }}>
+            {post.description}
+          </Text>
+        </Card>
       </ScrollView>
+
+      {isOwner && isOpen && (
+        <View style={{ position: "absolute", bottom: 0, left: 0, right: 0, padding: theme.spacing.lg, backgroundColor: theme.colors.background }}>
+          <Button variant="destructive" onPress={handleClose}>
+            Затвори оглас
+          </Button>
+        </View>
+      )}
+
+      {!isOwner && isHandyman && isOpen && isAuthenticated && (
+        <View style={{ position: "absolute", bottom: 0, left: 0, right: 0, padding: theme.spacing.lg, backgroundColor: theme.colors.background }}>
+          <Button onPress={handleRespond}>
+            Одговори
+          </Button>
+        </View>
+      )}
     </>
   );
 }
+
+function getTimeAgo(timestamp: number): string {
+  const seconds = Math.floor((Date.now() - timestamp) / 1000);
+  if (seconds < 60) return "Пред неколку секунди";
+  const minutes = Math.floor(seconds / 60);
+  if (minutes < 60) return `Пред ${minutes} мин`;
+  const hours = Math.floor(minutes / 60);
+  if (hours < 24) return `Пред ${hours} ч`;
+  const days = Math.floor(hours / 24);
+  if (days < 30) return `Пред ${days} ден`;
+  const months = Math.floor(days / 30);
+  return `Пред ${months} месеци`;
+}

app/post/create.tsx

@@ -1,19 +1,155 @@
-import { View, Text, ScrollView } from "react-native";
+import { View, Text, ScrollView, Alert } from "react-native";
-import { Stack } from "expo-router";
+import { Stack, useRouter } from "expo-router";
+import { useState } from "react";
+import { useMutation } from "convex/react";
+import { api } from "../../convex/_generated/api";
+import { useAuth } from "../_layout";
 import { useTheme } from "../../components/theme";
+import { Button } from "../../components/ui/button";
+import { Input } from "../../components/ui/input";
+import { Card } from "../../components/ui/card";
+import { CATEGORIES } from "../../lib/constants";
 
 export default function CreatePostScreen() {
+  const router = useRouter();
   const theme = useTheme();
+  const { token, isAuthenticated } = useAuth();
+
+  const [title, setTitle] = useState("");
+  const [description, setDescription] = useState("");
+  const [category, setCategory] = useState<string | null>(null);
+  const [location, setLocation] = useState("");
+  const [budget, setBudget] = useState("");
+  const [submitting, setSubmitting] = useState(false);
+
+  const createPost = useMutation(api.posts.create);
+
+  if (!isAuthenticated) {
+    return (
+      <>
+        <Stack.Screen options={{ title: "Ново побарување", headerShown: true, headerBackButtonDisplayMode: "minimal" }} />
+        <View style={{ flex: 1, justifyContent: "center", alignItems: "center", backgroundColor: theme.colors.background, padding: theme.spacing.lg }}>
+          <Text style={{ fontSize: 48, marginBottom: 16 }}>🔒</Text>
+          <Text style={{ fontSize: 18, fontWeight: "600", color: theme.colors.text, marginBottom: 8 }}>
+            Најавете се
+          </Text>
+          <Text style={{ color: theme.colors.textSecondary, textAlign: "center", marginBottom: theme.spacing.lg }}>
+            Треба да сте најавени за да креирате побарување.
+          </Text>
+          <Button onPress={() => router.push("/(auth)/login" as any)}>Најави се</Button>
+        </View>
+      </>
+    );
+  }
+
+  async function handleSubmit() {
+    if (!title.trim()) {
+      Alert.alert("Грешка", "Внесете наслов");
+      return;
+    }
+    if (!description.trim()) {
+      Alert.alert("Грешка", "Внесете опис");
+      return;
+    }
+
+    setSubmitting(true);
+    try {
+      const postId = await createPost({
+        token: token!,
+        title: title.trim(),
+        description: description.trim(),
+        category: category ?? undefined,
+        location: location.trim() || undefined,
+        budget: budget.trim() || undefined,
+      });
+      router.replace(`/post/${postId}` as any);
+    } catch (e: any) {
+      Alert.alert("Грешка", e.message || "Неуспешно креирање");
+    } finally {
+      setSubmitting(false);
+    }
+  }
 
   return (
     <>
       <Stack.Screen options={{ title: "Ново побарување", headerShown: true, headerBackButtonDisplayMode: "minimal" }} />
-      <ScrollView contentInsetAdjustmentBehavior="automatic" contentContainerStyle={{ padding: 16 }}>
+      <ScrollView contentInsetAdjustmentBehavior="automatic" contentContainerStyle={{ padding: theme.spacing.lg, gap: theme.spacing.md }}>
-        <View style={{ alignItems: "center", paddingVertical: 60 }}>
+        <View style={{ gap: theme.spacing.xs }}>
-          <Text style={{ fontSize: 18, fontWeight: "600", color: theme.colors.text }}>
+          <Text style={{ fontSize: 14, fontWeight: "600", color: theme.colors.text }}>Наслов *</Text>
-            Креирање побарување — доаѓа во Фаза 4
+          <Input
+            placeholder="Што ви треба?"
+            value={title}
+            onChangeText={setTitle}
+            maxLength={100}
+          />
+        </View>
+
+        <View style={{ gap: theme.spacing.xs }}>
+          <Text style={{ fontSize: 14, fontWeight: "600", color: theme.colors.text }}>Опис *</Text>
+          <Input
+            placeholder="Опишете го проблемот детално..."
+            value={description}
+            onChangeText={setDescription}
+            multiline
+            numberOfLines={4}
+            style={{ minHeight: 100, textAlignVertical: "top" }}
+            maxLength={2000}
+          />
+        </View>
+
+        <View style={{ gap: theme.spacing.xs }}>
+          <Text style={{ fontSize: 14, fontWeight: "600", color: theme.colors.text }}>Категорија</Text>
+          <View style={{ flexDirection: "row", flexWrap: "wrap", gap: theme.spacing.xs }}>
+            {CATEGORIES.map((cat) => (
+              <View
+                key={cat.slug}
+                style={{
+                  backgroundColor: category === cat.slug ? theme.colors.primary : theme.colors.surface,
+                  borderRadius: theme.radius.md,
+                  paddingHorizontal: 12,
+                  paddingVertical: 8,
+                  borderWidth: 1,
+                  borderColor: category === cat.slug ? theme.colors.primary : theme.colors.border,
+                }}
+              >
+                <Text
+                  style={{
+                    color: category === cat.slug ? "#FFFFFF" : theme.colors.text,
+                    fontSize: 13,
+                    fontWeight: "500",
+                  }}
+                  onPress={() => setCategory(category === cat.slug ? null : cat.slug)}
+                >
+                  {cat.name}
                 </Text>
               </View>
+            ))}
+          </View>
+        </View>
+
+        <View style={{ gap: theme.spacing.xs }}>
+          <Text style={{ fontSize: 14, fontWeight: "600", color: theme.colors.text }}>Локација</Text>
+          <Input
+            placeholder="нр. Скопје, Битола..."
+            value={location}
+            onChangeText={setLocation}
+            maxLength={100}
+          />
+        </View>
+
+        <View style={{ gap: theme.spacing.xs }}>
+          <Text style={{ fontSize: 14, fontWeight: "600", color: theme.colors.text }}>Буџет</Text>
+          <Input
+            placeholder="нр. 5000 - 10000 денари"
+            value={budget}
+            onChangeText={setBudget}
+            maxLength={100}
+          />
+        </View>
+
+        <Button onPress={handleSubmit} loading={submitting} disabled={submitting}>
+          Објави побарување
+        </Button>
       </ScrollView>
     </>
   );

components/post-card.tsx

@@ -0,0 +1,62 @@
+import { View, Text, Pressable } from "react-native";
+import { Link } from "expo-router";
+import { useTheme } from "./theme";
+import { Badge } from "./ui/badge";
+import { getCategoryName } from "../lib/constants";
+
+interface PostCardProps {
+  post: {
+    _id: string;
+    title: string;
+    description: string;
+    category?: string;
+    location?: string;
+    budget?: string;
+    status: string;
+    createdAt: number;
+  };
+}
+
+export function PostCard({ post }: PostCardProps) {
+  const theme = useTheme();
+  const categoryName = post.category ? getCategoryName(post.category) : null;
+  const isOpen = post.status === "open";
+
+  return (
+    <Link href={`/post/${post._id}` as any} asChild>
+      <Pressable
+        style={{
+          backgroundColor: theme.colors.card,
+          borderRadius: theme.radius.lg,
+          padding: theme.spacing.md,
+          borderWidth: 1,
+          borderColor: theme.colors.border,
+          gap: theme.spacing.sm,
+        }}
+      >
+        <View style={{ flexDirection: "row", justifyContent: "space-between", alignItems: "flex-start" }}>
+          <Text style={{ fontSize: 16, fontWeight: "600", color: theme.colors.text, flex: 1 }} numberOfLines={2}>
+            {post.title}
+          </Text>
+          <Badge label={isOpen ? "Отворено" : "Затворено"} variant={isOpen ? "success" : "error"} />
+        </View>
+
+        <Text style={{ fontSize: 14, color: theme.colors.textSecondary }} numberOfLines={2}>
+          {post.description}
+        </Text>
+
+        <View style={{ flexDirection: "row", alignItems: "center", gap: 8, flexWrap: "wrap" }}>
+          {categoryName && <Badge label={categoryName} variant="primary" />}
+          {post.location && (
+            <Text style={{ fontSize: 13, color: theme.colors.textTertiary }}>📍 {post.location}</Text>
+          )}
+          {post.budget && (
+            <Text style={{ fontSize: 13, color: theme.colors.primary, fontWeight: "600" }}>
+              💰 {post.budget}
+            </Text>
+          )}
+        </View>
+      </Pressable>
+    </Link>
+  );
+}

convex/chats.ts

@@ -1,4 +1,4 @@
-import { query } from "./_generated/server";
+import { query, mutation } from "./_generated/server";
 import { v } from "convex/values";
 
 export const listByUser = query({
@@ -8,3 +8,35 @@ export const listByUser = query({
     return allChats.filter((chat) => chat.participantIds.includes(args.userId));
   },
 });
+
+export const getOrCreate = mutation({
+  args: {
+    token: v.string(),
+    partnerId: v.id("users"),
+  },
+  handler: async (ctx, args) => {
+    const session = await ctx.db
+      .query("sessions")
+      .withIndex("by_token", (q) => q.eq("token", args.token))
+      .first();
+    if (!session) throw new Error("Неавторизиран");
+
+    const allChats = await ctx.db.query("chats").collect();
+    const existing = allChats.find(
+      (c) =>
+        c.participantIds.includes(session.userId) &&
+        c.participantIds.includes(args.partnerId) &&
+        c.participantIds.length === 2
+    );
+
+    if (existing) return existing._id;
+
+    const chatId = await ctx.db.insert("chats", {
+      participantIds: [session.userId, args.partnerId],
+      lastMessageAt: Date.now(),
+      createdBy: session.userId,
+    });
+
+    return chatId;
+  },
+});

convex/posts.ts

@@ -1,4 +1,4 @@
-import { query } from "./_generated/server";
+import { query, mutation } from "./_generated/server";
 import { v } from "convex/values";
 
 export const list = query({
@@ -21,6 +21,71 @@ export const getByCustomer = query({
     return await ctx.db
       .query("posts")
       .withIndex("by_customer", (q) => q.eq("customerId", args.customerId))
+      .order("desc")
       .collect();
   },
 });
+
+export const getById = query({
+  args: { id: v.id("posts") },
+  handler: async (ctx, args) => {
+    return await ctx.db.get(args.id);
+  },
+});
+
+export const create = mutation({
+  args: {
+    token: v.string(),
+    title: v.string(),
+    description: v.string(),
+    category: v.optional(v.string()),
+    location: v.optional(v.string()),
+    budget: v.optional(v.string()),
+  },
+  handler: async (ctx, args) => {
+    const session = await ctx.db
+      .query("sessions")
+      .withIndex("by_token", (q) => q.eq("token", args.token))
+      .first();
+    if (!session) throw new Error("Неавторизиран");
+
+    const user = await ctx.db.get(session.userId);
+    if (!user) throw new Error("Корисникот не е пронајден");
+
+    const now = Date.now();
+    const postId = await ctx.db.insert("posts", {
+      customerId: session.userId,
+      title: args.title,
+      description: args.description,
+      category: args.category,
+      location: args.location,
+      budget: args.budget,
+      status: "open",
+      createdAt: now,
+      updatedAt: now,
+    });
+
+    return postId;
+  },
+});
+
+export const close = mutation({
+  args: {
+    token: v.string(),
+    postId: v.id("posts"),
+  },
+  handler: async (ctx, args) => {
+    const session = await ctx.db
+      .query("sessions")
+      .withIndex("by_token", (q) => q.eq("token", args.token))
+      .first();
+    if (!session) throw new Error("Неавторизиран");
+
+    const post = await ctx.db.get(args.postId);
+    if (!post) throw new Error("Побарувањето не е пронајдено");
+    if (post.customerId !== session.userId) throw new Error("Само авторот може да го затвори побарувањето");
+
+    await ctx.db.patch(args.postId, { status: "closed", updatedAt: Date.now() });
+    return true;
+  },
+});