feat: multi-workspace support + channels grouped by workspace and network

- PostizContext: new PostizWorkspace type, multi-workspace storage
  (postiz_workspaces_v2), auto-migration from legacy single config,
  addWorkspace / updateWorkspace / removeWorkspace, clients map
- Settings: full rewrite with workspace card list (add / edit / delete)
- Compose: channels displayed in two levels — workspace section then
  network type (X/Twitter, Instagram, LinkedIn...) within each workspace;
  submit routes posts and image uploads per workspace
- MediaLibraryModal: workspace tabs when multiple workspaces configured,
  returned items carry their workspaceId

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

artifacts/postiz-mobile/context/PostizContext.tsx

@@ -5,14 +5,22 @@ import React, {
   useCallback,
   useContext,
   useEffect,
-  useRef,
   useState,
 } from "react";
 
-const API_KEY_STORAGE = "postiz_api_key";
-const BASE_URL_STORAGE = "postiz_base_url";
+const WORKSPACES_KEY = "postiz_workspaces_v2";
+const LEGACY_API_KEY = "postiz_api_key";
+const LEGACY_BASE_URL = "postiz_base_url";
+
 export const DEFAULT_BASE_URL = "https://postiz.gyozamancave.fr/api/public/v1";
 
+export interface PostizWorkspace {
+  id: string;
+  name: string;
+  apiKey: string;
+  baseUrl: string;
+}
+
 export interface PostizIntegration {
   id: string;
   name: string;
@@ -45,129 +53,129 @@ export interface PostizUploadResult {
 }
 
 interface PostizContextValue {
-  apiKey: string;
-  baseUrl: string;
+  workspaces: PostizWorkspace[];
   isConfigured: boolean;
   isLoading: boolean;
-  unauthorized: boolean;
-  clearUnauthorized: () => void;
+  clients: Record<string, AxiosInstance>;
+  addWorkspace: (ws: Omit<PostizWorkspace, "id">) => Promise<void>;
+  updateWorkspace: (ws: PostizWorkspace) => Promise<void>;
+  removeWorkspace: (id: string) => Promise<void>;
+  // backward compat for posts.tsx (first workspace)
   client: AxiosInstance | null;
-  saveSettings: (apiKey: string, baseUrl: string) => Promise<void>;
-  clearSettings: () => Promise<void>;
+  apiKey: string;
+  baseUrl: string;
 }
 
 const PostizContext = createContext<PostizContextValue>({
-  apiKey: "",
-  baseUrl: DEFAULT_BASE_URL,
+  workspaces: [],
   isConfigured: false,
   isLoading: true,
-  unauthorized: false,
-  clearUnauthorized: () => {},
+  clients: {},
+  addWorkspace: async () => {},
+  updateWorkspace: async () => {},
+  removeWorkspace: async () => {},
   client: null,
-  saveSettings: async () => {},
-  clearSettings: async () => {},
+  apiKey: "",
+  baseUrl: DEFAULT_BASE_URL,
 });
 
-function createClient(
-  apiKey: string,
-  baseUrl: string,
-  onUnauthorized?: () => void
-): AxiosInstance {
-  const normalizedUrl = baseUrl.endsWith("/") ? baseUrl : baseUrl + "/";
+function makeClient(ws: PostizWorkspace): AxiosInstance {
+  const baseURL = ws.baseUrl.endsWith("/") ? ws.baseUrl : ws.baseUrl + "/";
   const instance = axios.create({
-    baseURL: normalizedUrl,
-    headers: {
-      Authorization: apiKey,
-      "Content-Type": "application/json",
-    },
+    baseURL,
+    headers: { Authorization: ws.apiKey, "Content-Type": "application/json" },
     timeout: 15000,
   });
   instance.interceptors.request.use((config) => {
-    console.log(">>> REQUEST:", config.method?.toUpperCase(), (config.baseURL || "") + (config.url || ""));
+    console.log(">>> REQUEST:", config.method?.toUpperCase(), (config.baseURL ?? "") + (config.url ?? ""));
     return config;
   });
-  instance.interceptors.response.use(
-    (res) => res,
-    (err) => {
-      if (axios.isAxiosError(err) && err.response?.status === 401) {
-        onUnauthorized?.();
-      }
-      return Promise.reject(err);
-    }
-  );
   return instance;
 }
 
+function buildClients(list: PostizWorkspace[]): Record<string, AxiosInstance> {
+  return Object.fromEntries(list.map((ws) => [ws.id, makeClient(ws)]));
+}
+
 export function PostizProvider({ children }: { children: React.ReactNode }) {
-  const [apiKey, setApiKey] = useState("");
-  const [baseUrl, setBaseUrl] = useState(DEFAULT_BASE_URL);
+  const [workspaces, setWorkspaces] = useState<PostizWorkspace[]>([]);
+  const [clients, setClients] = useState<Record<string, AxiosInstance>>({});
   const [isLoading, setIsLoading] = useState(true);
-  const [client, setClient] = useState<AxiosInstance | null>(null);
-  const [unauthorized, setUnauthorized] = useState(false);
-  const unauthorizedFiredRef = useRef(false);
-
-  const handleUnauthorized = useCallback(() => {
-    if (unauthorizedFiredRef.current) return;
-    unauthorizedFiredRef.current = true;
-    setUnauthorized(true);
-  }, []);
-
-  const clearUnauthorized = useCallback(() => {
-    unauthorizedFiredRef.current = false;
-    setUnauthorized(false);
-  }, []);
 
   useEffect(() => {
     (async () => {
       try {
-        const storedKey = await SecureStore.getItemAsync(API_KEY_STORAGE);
-        const storedUrl = await SecureStore.getItemAsync(BASE_URL_STORAGE);
-        if (storedKey) {
-          const url = (storedUrl || DEFAULT_BASE_URL).replace(/\/$/, "");
-          setApiKey(storedKey);
-          setBaseUrl(url);
-          setClient(() => createClient(storedKey, url, handleUnauthorized));
+        const stored = await SecureStore.getItemAsync(WORKSPACES_KEY);
+        if (stored) {
+          const list: PostizWorkspace[] = JSON.parse(stored);
+          setWorkspaces(list);
+          setClients(buildClients(list));
+        } else {
+          // Migrate legacy single-workspace config
+          const legacyKey = await SecureStore.getItemAsync(LEGACY_API_KEY);
+          const legacyUrl = await SecureStore.getItemAsync(LEGACY_BASE_URL);
+          if (legacyKey) {
+            const migrated: PostizWorkspace = {
+              id: Date.now().toString(),
+              name: "Default",
+              apiKey: legacyKey,
+              baseUrl: (legacyUrl || DEFAULT_BASE_URL).replace(/\/$/, ""),
+            };
+            const list = [migrated];
+            await SecureStore.setItemAsync(WORKSPACES_KEY, JSON.stringify(list));
+            setWorkspaces(list);
+            setClients(buildClients(list));
+          }
         }
       } catch {
       } finally {
         setIsLoading(false);
       }
     })();
-  }, [handleUnauthorized]);
+  }, []);
 
-  const saveSettings = useCallback(
-    async (newApiKey: string, newBaseUrl: string) => {
-      await SecureStore.setItemAsync(API_KEY_STORAGE, newApiKey);
-      await SecureStore.setItemAsync(BASE_URL_STORAGE, newBaseUrl);
-      setApiKey(newApiKey);
-      setBaseUrl(newBaseUrl);
-      clearUnauthorized();
-      setClient(() => createClient(newApiKey, newBaseUrl, handleUnauthorized));
+  const persist = useCallback(async (list: PostizWorkspace[]) => {
+    await SecureStore.setItemAsync(WORKSPACES_KEY, JSON.stringify(list));
+    setWorkspaces(list);
+    setClients(buildClients(list));
+  }, []);
+
+  const addWorkspace = useCallback(
+    async (ws: Omit<PostizWorkspace, "id">) => {
+      await persist([...workspaces, { ...ws, id: Date.now().toString() }]);
     },
-    [handleUnauthorized, clearUnauthorized]
+    [workspaces, persist]
   );
 
-  const clearSettings = useCallback(async () => {
-    await SecureStore.deleteItemAsync(API_KEY_STORAGE);
-    await SecureStore.deleteItemAsync(BASE_URL_STORAGE);
-    setApiKey("");
-    setBaseUrl(DEFAULT_BASE_URL);
-    setClient(null);
-    clearUnauthorized();
-  }, [clearUnauthorized]);
+  const updateWorkspace = useCallback(
+    async (ws: PostizWorkspace) => {
+      await persist(workspaces.map((w) => (w.id === ws.id ? ws : w)));
+    },
+    [workspaces, persist]
+  );
+
+  const removeWorkspace = useCallback(
+    async (id: string) => {
+      await persist(workspaces.filter((w) => w.id !== id));
+    },
+    [workspaces, persist]
+  );
+
+  const primaryWorkspace = workspaces[0] ?? null;
 
   return (
     <PostizContext.Provider
       value={{
-        apiKey,
-        baseUrl,
-        isConfigured: !!apiKey,
+        workspaces,
+        isConfigured: workspaces.length > 0,
         isLoading,
-        unauthorized,
-        clearUnauthorized,
-        client,
-        saveSettings,
-        clearSettings,
+        clients,
+        addWorkspace,
+        updateWorkspace,
+        removeWorkspace,
+        client: primaryWorkspace ? (clients[primaryWorkspace.id] ?? null) : null,
+        apiKey: primaryWorkspace?.apiKey ?? "",
+        baseUrl: primaryWorkspace?.baseUrl ?? DEFAULT_BASE_URL,
       }}
     >
       {children}