Add DID support and improve login state handling

Introduces a 'did' field to SwarmUserProfile and related API routes to support decentralized identifiers. Refactors login flow to use soft navigation and synchronize AuthContext state, including new 'login' and enhanced 'unlockIdentity' methods for better user state management.

src/lib/contexts/AuthContext.tsx

@@ -22,7 +22,8 @@ interface AuthContextType {
     did: string | null;
     handle: string | null;
     checkAdmin: () => Promise<void>;
-    unlockIdentity: (password: string) => Promise<void>;
+    unlockIdentity: (password: string, explicitUser?: User) => Promise<void>;
+    login: (user: User) => void;
     logout: () => Promise<void>;
     showUnlockPrompt: boolean;
     setShowUnlockPrompt: (show: boolean) => void;
@@ -37,6 +38,7 @@ const AuthContext = createContext<AuthContextType>({
     handle: null,
     checkAdmin: async () => { },
     unlockIdentity: async () => { },
+    login: () => { },
     logout: async () => { },
     showUnlockPrompt: false,
     setShowUnlockPrompt: () => { },
@@ -74,16 +76,18 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
     /**
      * Unlock the user's identity with their password
      */
-    const unlockIdentity = async (password: string) => {
-        if (!user?.privateKeyEncrypted) {
+    const unlockIdentity = async (password: string, explicitUser?: User) => {
+        const targetUser = explicitUser || user;
+
+        if (!targetUser?.privateKeyEncrypted) {
             throw new Error('No encrypted private key available');
         }
 
-        await unlockIdentityHook(user.privateKeyEncrypted, password);
+        await unlockIdentityHook(targetUser.privateKeyEncrypted, password);
 
         // Initialize Chat Keys (Async, don't block UI but start it)
-        if (user.id) {
-            ensureReady(password, user.id).catch(err => {
+        if (targetUser.id) {
+            ensureReady(password, targetUser.id).catch(err => {
                 console.error('Failed to initialize chat keys:', err);
             });
         }
@@ -91,6 +95,15 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
         setShowUnlockPrompt(false); // Close prompt on success
     };
 
+    /**
+     * Manually set the user state (called after successful login)
+     */
+    const login = (userData: User) => {
+        setUser(userData);
+        // We re-check admin status just in case
+        checkAdmin();
+    };
+
     /**
      * Logout the user and clear their identity
      */
@@ -159,6 +172,7 @@ export function AuthProvider({ children }: { children: React.ReactNode }) {
             handle: identity?.handle || null,
             checkAdmin,
             unlockIdentity,
+            login,
             logout,
             showUnlockPrompt,
             setShowUnlockPrompt,