fix: Cline OAuth base64 parsing + name=email fallback for all OAuth accounts

- cline.ts: add decodeURIComponent before base64 decode to handle URL-encoded codes
- cline.ts: populate name = firstName+lastName || email in mapTokens
- oauth/exchange route: normalize name=email for all providers on exchange/poll/poll-callback
- Fixes: accounts showing Account #ID instead of email in providers dashboard

src/app/api/oauth/[provider]/[action]/route.ts

@@ -226,6 +226,12 @@ export async function POST(
         exchangeTokens(provider, code, redirectUri, codeVerifier, state)
       );
 
+      // Normalize: if name is missing, use email or displayName as fallback so accounts
+      // always show a real label (e.g. user@gmail.com) instead of "Account #abc123"
+      if (!tokenData.name && (tokenData.email || tokenData.displayName)) {
+        tokenData.name = tokenData.email || tokenData.displayName;
+      }
+
       // Upsert: update existing connection if same provider+email, else create new
       const expiresAt = tokenData.expiresIn
         ? new Date(Date.now() + tokenData.expiresIn * 1000).toISOString()
@@ -297,6 +303,11 @@ export async function POST(
       }
 
       if (result.success) {
+        // Normalize: if name is missing, use email as fallback display label
+        if (!result.tokens.name && (result.tokens.email || result.tokens.displayName)) {
+          result.tokens.name = result.tokens.email || result.tokens.displayName;
+        }
+
         // Upsert: update existing connection if same provider+email, else create new
         const expiresAt = result.tokens.expiresIn
           ? new Date(Date.now() + result.tokens.expiresIn * 1000).toISOString()
@@ -418,6 +429,11 @@ export async function POST(
           exchangeTokens(provider, params.code, redirectUri, codeVerifier, params.state)
         );
 
+        // Normalize: if name is missing, use email as fallback display label
+        if (!tokenData.name && (tokenData.email || tokenData.displayName)) {
+          tokenData.name = tokenData.email || tokenData.displayName;
+        }
+
         // Upsert: update existing connection if same provider+email, else create new
         const expiresAt = tokenData.expiresIn
           ? new Date(Date.now() + tokenData.expiresIn * 1000).toISOString()

src/lib/oauth/providers/cline.ts

@@ -13,7 +13,14 @@ export const cline = {
   },
   exchangeToken: async (config, code, redirectUri) => {
     try {
+      // Cline embeds tokens as base64-encoded JSON in the auth code.
+      // The code may be URL-encoded when pasted from the callback URL.
       let base64 = code;
+      try {
+        base64 = decodeURIComponent(base64);
+      } catch {
+        /* already decoded */
+      }
       const padding = 4 - (base64.length % 4);
       if (padding !== 4) {
         base64 += "=".repeat(padding);
@@ -62,16 +69,23 @@ export const cline = {
       };
     }
   },
-  mapTokens: (tokens) => ({
-    accessToken: tokens.access_token,
-    refreshToken: tokens.refresh_token,
-    expiresIn: tokens.expires_at
-      ? Math.floor((new Date(tokens.expires_at).getTime() - Date.now()) / 1000)
-      : 3600,
-    email: tokens.email,
-    providerSpecificData: {
-      firstName: tokens.firstName,
-      lastName: tokens.lastName,
-    },
-  }),
+  mapTokens: (tokens) => {
+    const firstName = tokens.firstName || "";
+    const lastName = tokens.lastName || "";
+    const fullName = [firstName, lastName].filter(Boolean).join(" ").trim();
+    return {
+      accessToken: tokens.access_token,
+      refreshToken: tokens.refresh_token,
+      expiresIn: tokens.expires_at
+        ? Math.floor((new Date(tokens.expires_at).getTime() - Date.now()) / 1000)
+        : 3600,
+      // Use full name if available, fallback to email so UI shows a real label
+      name: fullName || tokens.email || null,
+      email: tokens.email,
+      providerSpecificData: {
+        firstName: tokens.firstName,
+        lastName: tokens.lastName,
+      },
+    };
+  },
 };