Added thumbnail

Channel-Backend/package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "start": "node dist/app.js",
     "dev": "nodemon src/app.ts",
-    "build": "tsc"
+    "build": "tsc",
+    "test:smtp": "ts-node scripts/test-smtp.ts"
   },
   "dependencies": {
     "@aws-sdk/client-s3": "^3.1083.0",

Channel-Backend/scripts/test-smtp.ts

@@ -0,0 +1,87 @@
+import dotenv from 'dotenv';
+import nodemailer from 'nodemailer';
+import path from 'path';
+
+// Load environment variables from .env
+dotenv.config({ path: path.resolve(__dirname, '../.env') });
+
+async function main() {
+  const host = process.env.SMTP_HOST || 'localhost';
+  const port = parseInt(process.env.SMTP_PORT || '587', 10);
+  const user = process.env.SMTP_USER || '';
+  const pass = process.env.SMTP_PASS || '';
+  const from = process.env.SMTP_FROM || user;
+  const enableReal = process.env.ENABLE_REAL_EMAILS;
+  const nodeEnv = process.env.NODE_ENV;
+
+  console.log('==================================================');
+  console.log('          SMTP CREDENTIALS & SERVICE TEST         ');
+  console.log('==================================================');
+  console.log(`• NODE_ENV           : ${nodeEnv || '(not set)'}`);
+  console.log(`• ENABLE_REAL_EMAILS : ${enableReal || '(not set)'}`);
+  console.log(`• SMTP_HOST          : ${host}`);
+  console.log(`• SMTP_PORT          : ${port}`);
+  console.log(`• SMTP_USER          : ${user || '(empty)'}`);
+  console.log(`• SMTP_PASS          : ${pass ? '********' : '(empty)'}`);
+  console.log(`• SMTP_FROM          : ${from}`);
+  console.log('--------------------------------------------------');
+
+  if (enableReal !== 'true') {
+    console.warn('⚠️ WARNING: ENABLE_REAL_EMAILS is not set to "true". Real email dispatch is disabled in application code.');
+  }
+
+  const transporter = nodemailer.createTransport({
+    host,
+    port,
+    secure: port === 465,
+    auth: user && pass ? { user, pass } : undefined,
+    tls: {
+      rejectUnauthorized: false,
+    },
+  });
+
+  console.log('\n[1/2] Verifying SMTP connection & authentication credentials...');
+
+  try {
+    const verified = await transporter.verify();
+    console.log('✅ SUCCESS: SMTP Server is reachable and authentication credentials are VALID!');
+  } catch (err: any) {
+    console.error('❌ FAILED: SMTP Connection or Authentication failed!');
+    console.error(`Reason: ${err.message || err}`);
+    if (err.code === 'ECONNREFUSED') {
+      console.error(`👉 Suggestion: Port ${port} is blocked or not accepting connections on ${host}. Check firewall rules.`);
+    } else if (err.responseCode === 535 || err.code === 'EAUTH') {
+      console.error('👉 Suggestion: Invalid SMTP_USER or SMTP_PASS.');
+    }
+    process.exit(1);
+  }
+
+  // Optional: If an email argument is provided, send a test email
+  const recipient = process.argv[2];
+  if (recipient) {
+    console.log(`\n[2/2] Sending test email to: ${recipient}...`);
+    try {
+      const info = await transporter.sendMail({
+        from: from || user,
+        to: recipient,
+        subject: 'Tech4Biz Channel Partner SMTP Verification',
+        text: 'This is a test email sent from the Tech4Biz SMTP Test Script.',
+        html: '<div style="font-family: sans-serif; padding: 20px; border: 1px solid #ccc;"><h3>SMTP Test Successful!</h3><p>Your backend SMTP configuration is working properly.</p></div>',
+      });
+      console.log(`✅ SUCCESS: Email delivered successfully to ${recipient}!`);
+      console.log(`• Message ID: ${info.messageId}`);
+    } catch (err: any) {
+      console.error(`❌ FAILED: Could not send test email to ${recipient}.`);
+      console.error(`Reason: ${err.message || err}`);
+    }
+  } else {
+    console.log('\nℹ️  To send an actual test email, run:');
+    console.log('   npx ts-node scripts/test-smtp.ts <your-email-address>');
+  }
+  console.log('==================================================\n');
+}
+
+main().catch((err) => {
+  console.error('Unexpected error:', err);
+  process.exit(1);
+});

Channel-Backend/src/controllers/asset.controller.ts

@@ -23,9 +23,13 @@ export class AssetController {
 
   public uploadAsset = async (req: AuthRequest, res: Response, next: NextFunction) => {
     try {
+      const files = req.files as { [fieldname: string]: Express.Multer.File[] } | undefined;
+      const assetFile = files?.file?.[0] || req.file;
+      const thumbnailFile = files?.thumbnail?.[0];
+
       const isUrlAsset = req.body.isUrlAsset === 'true' || req.body.isUrlAsset === true || req.body.type === 'url' || req.body.type === 'case_study';
       
-      if (!isUrlAsset && !req.file) {
+      if (!isUrlAsset && !assetFile) {
         throw new Error('No file uploaded');
       }
       
@@ -43,15 +47,15 @@ export class AssetController {
       }
 
       let fileUrl = '';
-      if (!isUrlAsset && req.file) {
+      if (!isUrlAsset && assetFile) {
         const uniqueSuffix = Date.now() + '-' + Math.round(Math.random() * 1e9);
-        const filename = uniqueSuffix + path.extname(req.file.originalname);
+        const filename = uniqueSuffix + path.extname(assetFile.originalname);
         
         await s3Client.send(new PutObjectCommand({
           Bucket: BUCKET_NAME,
           Key: filename,
-          Body: req.file.buffer,
-          ContentType: req.file.mimetype,
+          Body: assetFile.buffer,
+          ContentType: assetFile.mimetype,
         }));
         
         fileUrl = `/uploads/${filename}`;
@@ -59,6 +63,25 @@ export class AssetController {
         fileUrl = req.body.url;
       }
 
+      // Handle thumbnail file upload if present
+      let thumbnailUrl: string | null = req.body.thumbnailUrl || null;
+      if (thumbnailFile) {
+        if (!thumbnailFile.mimetype.startsWith('image/')) {
+          return res.status(400).json({ error: 'Thumbnail must be an image file' });
+        }
+        const thumbSuffix = Date.now() + '-' + Math.round(Math.random() * 1e9);
+        const thumbFilename = 'thumb-' + thumbSuffix + path.extname(thumbnailFile.originalname);
+        
+        await s3Client.send(new PutObjectCommand({
+          Bucket: BUCKET_NAME,
+          Key: thumbFilename,
+          Body: thumbnailFile.buffer,
+          ContentType: thumbnailFile.mimetype,
+        }));
+        
+        thumbnailUrl = `/uploads/${thumbFilename}`;
+      }
+
       const parseJsonOrArray = (val: any) => {
         if (!val) return undefined;
         if (typeof val === 'string' && val.trim()) {
@@ -73,9 +96,9 @@ export class AssetController {
       let complianceIds = parseJsonOrArray(req.body.complianceIds);
 
       const assetData = {
-        title: req.body.title || (req.file ? req.file.originalname : 'URL Asset'),
-        type: req.body.type || (isUrlAsset ? 'url' : req.file!.mimetype),
-        size: isUrlAsset ? 0 : req.file!.size,
+        title: req.body.title || (assetFile ? assetFile.originalname : 'URL Asset'),
+        type: req.body.type || (isUrlAsset ? 'url' : assetFile!.mimetype),
+        size: isUrlAsset ? 0 : assetFile!.size,
         url: fileUrl,
         uploadedBy: uploaderId,
         description: req.body.description || null,
@@ -85,7 +108,7 @@ export class AssetController {
         githubUrl: req.body.githubUrl || null,
         status: req.body.status || 'published',
         isDownloadable: req.body.isDownloadable === 'true' || req.body.isDownloadable === true,
-        thumbnailUrl: req.body.thumbnailUrl || null,
+        thumbnailUrl: thumbnailUrl,
         problemStatement: req.body.problemStatement || null,
         solution: req.body.solution || null,
         verticalIds,
@@ -101,6 +124,33 @@ export class AssetController {
     } catch (err) { next(err); }
   }
 
+  public uploadThumbnail = async (req: AuthRequest, res: Response, next: NextFunction) => {
+    try {
+      const files = req.files as { [fieldname: string]: Express.Multer.File[] } | undefined;
+      const file = req.file || files?.thumbnail?.[0];
+      if (!file) {
+        return res.status(400).json({ error: 'No thumbnail file uploaded' });
+      }
+
+      if (!file.mimetype.startsWith('image/')) {
+        return res.status(400).json({ error: 'Thumbnail must be an image file' });
+      }
+
+      const thumbSuffix = Date.now() + '-' + Math.round(Math.random() * 1e9);
+      const thumbFilename = 'thumb-' + thumbSuffix + path.extname(file.originalname);
+
+      await s3Client.send(new PutObjectCommand({
+        Bucket: BUCKET_NAME,
+        Key: thumbFilename,
+        Body: file.buffer,
+        ContentType: file.mimetype,
+      }));
+
+      const thumbnailUrl = `/uploads/${thumbFilename}`;
+      res.status(200).json({ thumbnailUrl });
+    } catch (err) { next(err); }
+  }
+
   public listAssets = async (req: AuthRequest, res: Response, next: NextFunction) => {
     try {
       const userContext = req.user ? { role: req.user.role, userId: req.user.userId } : undefined;

Channel-Backend/src/routes/asset.routes.ts

@@ -8,7 +8,8 @@ const assetController = new AssetController();
 
 router.use(authenticate);
 
-router.post('/upload', requireRole('ADMIN'), upload.single('file'), assetController.uploadAsset);
+router.post('/upload', requireRole('ADMIN'), upload.fields([{ name: 'file', maxCount: 1 }, { name: 'thumbnail', maxCount: 1 }]), assetController.uploadAsset);
+router.post('/upload-thumbnail', requireRole('ADMIN'), upload.single('thumbnail'), assetController.uploadThumbnail);
 router.get('/scrape-case-study', requireRole('ADMIN'), assetController.scrapeCaseStudy);
 router.get('/', assetController.listAssets);
 router.patch('/bulk-share', requireRole('ADMIN'), assetController.bulkShareAssets);

Channel-Backend/src/services/asset.service.ts

@@ -368,6 +368,22 @@ export class AssetService {
     
     const updateData: any = { ...rest };
 
+    if (rest.thumbnailUrl !== undefined) {
+      const existing = await prisma.asset.findUnique({ where: { id }, select: { thumbnailUrl: true } });
+      if (existing?.thumbnailUrl && existing.thumbnailUrl.startsWith('/uploads/') && existing.thumbnailUrl !== rest.thumbnailUrl) {
+        const oldFilename = existing.thumbnailUrl.replace('/uploads/', '');
+        try {
+          await s3Client.send(new DeleteObjectCommand({
+            Bucket: BUCKET_NAME,
+            Key: oldFilename,
+          }));
+          console.log(`[S3] Cleaned up replaced thumbnail file: ${oldFilename}`);
+        } catch (err) {
+          console.error(`[S3] Failed to clean up replaced thumbnail file ${oldFilename}:`, err);
+        }
+      }
+    }
+
     if (tags !== undefined) {
       let parsedTags: string[] = [];
       if (Array.isArray(tags)) {
@@ -531,18 +547,32 @@ export class AssetService {
 
   public async deleteAsset(id: string) {
     const asset = await prisma.asset.findUnique({ where: { id } });
-    if (asset && asset.url.startsWith('/uploads/')) {
+    if (asset) {
+      if (asset.url && asset.url.startsWith('/uploads/')) {
         const filename = asset.url.replace('/uploads/', '');
         try {
           await s3Client.send(new DeleteObjectCommand({
             Bucket: BUCKET_NAME,
             Key: filename,
           }));
-        console.log(`[S3] Deleted file: ${filename}`);
+          console.log(`[S3] Deleted asset file: ${filename}`);
         } catch (err) {
           console.error(`[S3] Failed to delete file ${filename}:`, err);
         }
       }
+      if (asset.thumbnailUrl && asset.thumbnailUrl.startsWith('/uploads/')) {
+        const thumbFilename = asset.thumbnailUrl.replace('/uploads/', '');
+        try {
+          await s3Client.send(new DeleteObjectCommand({
+            Bucket: BUCKET_NAME,
+            Key: thumbFilename,
+          }));
+          console.log(`[S3] Deleted thumbnail file: ${thumbFilename}`);
+        } catch (err) {
+          console.error(`[S3] Failed to delete thumbnail file ${thumbFilename}:`, err);
+        }
+      }
+    }
     return await prisma.asset.delete({ where: { id } });
   }
 

Channel-Backend/src/services/mail.service.ts

@@ -25,7 +25,7 @@ export class MailService {
     const origin = originStorage.getStore() || process.env.CLIENT_ORIGIN || 'http://localhost:5173';
     const inviteUrl = `${origin}/invite?token=${inviteToken}`;
  
-    const isRealEmailAllowed = process.env.ENABLE_REAL_EMAILS === 'true' && process.env.NODE_ENV === 'production';
+    const isRealEmailAllowed = process.env.ENABLE_REAL_EMAILS === 'true';
 
     if (!isRealEmailAllowed) {
       console.log(`[DEV EMAIL SAFEGUARD] Blocked real email dispatch to real user/client: ${email}`);
@@ -78,7 +78,7 @@ export class MailService {
   public async sendCustomAnnouncement(options: { recipients: string[]; subject: string; messageBody: string }) {
     if (!options.recipients || options.recipients.length === 0) return;
 
-    const isRealEmailAllowed = process.env.ENABLE_REAL_EMAILS === 'true' && process.env.NODE_ENV === 'production';
+    const isRealEmailAllowed = process.env.ENABLE_REAL_EMAILS === 'true';
     if (!isRealEmailAllowed) {
       console.log(`[DEV EMAIL SAFEGUARD] Blocked announcement email to ${options.recipients.length} recipients (Development mode safety guard). Subject: "${options.subject}"`);
       return;

Channel-Frontend/src/features/assets/components/AssetCard.tsx

@@ -139,7 +139,8 @@ export const AssetCard: React.FC<AssetCardProps> = ({
   const isPresentation = asset.type.includes('presentation') || asset.url.toLowerCase().endsWith('.pptx') || asset.url.toLowerCase().endsWith('.ppt');
   const isSpreadsheet = asset.type.includes('sheet') || asset.url.toLowerCase().endsWith('.xlsx') || asset.url.toLowerCase().endsWith('.xls') || asset.url.toLowerCase().endsWith('.csv');
 
-  const hasBanner = isImage || !!asset.thumbnailUrl;
+  const [imgError, setImgError] = useState(false);
+  const hasBanner = (isImage || !!asset.thumbnailUrl) && !imgError;
   const bannerSrc = asset.thumbnailUrl ? asset.thumbnailUrl : asset.url;
 
   const handleInspectWithAI = (e: React.MouseEvent) => {
@@ -315,12 +316,10 @@ export const AssetCard: React.FC<AssetCardProps> = ({
             <img
               src={getFullAssetUrl(bannerSrc)}
               alt={asset.title}
+              loading="lazy"
+              decoding="async"
               className="w-full h-full object-cover transition-transform duration-500 group-hover:scale-105"
-              onError={(e) => {
-                e.currentTarget.style.display = 'none';
-                const placeholder = document.getElementById(`fallback-${asset.id}`);
-                if (placeholder) placeholder.style.display = 'flex';
-              }}
+              onError={() => setImgError(true)}
             />
           ) : isPdf ? (
             <PdfThumbnail

Channel-Frontend/src/features/assets/components/AssetDetailsModal.tsx

@@ -1,5 +1,6 @@
 import React from 'react';
 import type { Asset } from '../../../types/assets';
+import { getFullAssetUrl } from '../../../utils/asset-url';
 import Modal from '../../../components/ui/Modal';
 import Button from '../../../components/ui/Button';
 
@@ -62,7 +63,7 @@ export const AssetDetailsModal: React.FC<AssetDetailsModalProps> = ({
                 <h4 className="text-[10px] font-bold uppercase tracking-wider text-ink-500 font-sans mb-1.5">Banner Image</h4>
                 <div className="w-full h-44 rounded-lg overflow-hidden border border-ink-200 shadow-sm bg-ink-50">
                   <img 
-                    src={asset.thumbnailUrl} 
+                    src={getFullAssetUrl(asset.thumbnailUrl)} 
                     alt="Asset Banner" 
                     className="w-full h-full object-cover"
                   />

Channel-Frontend/src/features/assets/components/AssetExplorer.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useEffect } from 'react';
 import type { Asset, Category } from '../../../types';
 import { apiClient } from '../../../lib/api-client';
+import { getFullAssetUrl } from '../../../utils/asset-url';
 import { Cpu, Terminal, Brain, Server, Search, Download, Calendar, User, Tag, HelpCircle, X } from 'lucide-react';
 import { useToast } from '../../../hooks/use-toast';
 
@@ -206,7 +207,7 @@ export const AssetExplorer: React.FC = () => {
               {/* Card Image banner */}
               <div className="h-44 w-full relative overflow-hidden bg-ink-100">
                 <img
-                  src={asset.thumbnailUrl}
+                  src={getFullAssetUrl(asset.thumbnailUrl)}
                   alt={asset.title}
                   className="w-full h-full object-cover group-hover:scale-105 transition-transform duration-500"
                 />
@@ -287,7 +288,7 @@ export const AssetExplorer: React.FC = () => {
             {/* Modal Image banner */}
             <div className="h-60 rounded-xl overflow-hidden bg-ink-100 relative">
               <img
-                src={selectedAsset.thumbnailUrl}
+                src={getFullAssetUrl(selectedAsset.thumbnailUrl)}
                 alt={selectedAsset.title}
                 className="w-full h-full object-cover"
               />

Channel-Frontend/src/features/assets/components/AssetViewerModal.tsx

@@ -2,6 +2,7 @@ import React, { useState, useEffect } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { Minimize2, Maximize2, Globe, ExternalLink, FileText, File, Download, Compass, Sparkles } from 'lucide-react';
 import { axiosInstance } from '../../../services/axios';
+import { getFullAssetUrl } from '../../../utils/asset-url';
 import type { Asset } from '../../../types/assets';
 import type { User } from '../../../types/auth';
 import Modal from '../../../components/ui/Modal';
@@ -811,7 +812,7 @@ export const AssetViewerModal: React.FC<AssetViewerModalProps> = ({
               <div className="max-w-4xl mx-auto w-full space-y-6">
                 {asset.thumbnailUrl && (
                   <div className="w-full h-48 rounded-2xl overflow-hidden border border-ink-200 shadow-sm relative bg-ink-100">
-                    <img src={asset.thumbnailUrl} alt={asset.title} className="w-full h-full object-cover" />
+                    <img src={getFullAssetUrl(asset.thumbnailUrl)} alt={asset.title} className="w-full h-full object-cover" />
                   </div>
                 )}
                 

Channel-Frontend/src/features/assets/components/EditAssetModal.tsx

@@ -1,5 +1,7 @@
 import React, { useState, useEffect } from 'react';
-import { updateAsset, getTaxonomyMeta } from '../../../services/assets-api';
+import { UploadCloud, X, Trash2 } from 'lucide-react';
+import { updateAsset, uploadThumbnail, getTaxonomyMeta } from '../../../services/assets-api';
+import { getFullAssetUrl } from '../../../utils/asset-url';
 import type { Asset, TaxonomyMeta } from '../../../types/assets';
 import Modal from '../../../components/ui/Modal';
 import Button from '../../../components/ui/Button';
@@ -33,6 +35,10 @@ export const EditAssetModal: React.FC<EditAssetModalProps> = ({
   const [editTags, setEditTags] = useState('');
   const [editGithubUrl, setEditGithubUrl] = useState('');
   const [editIsDownloadable, setEditIsDownloadable] = useState(true);
+  const [editThumbnailMode, setEditThumbnailMode] = useState<'url' | 'file'>('url');
+  const [editThumbnailUrl, setEditThumbnailUrl] = useState('');
+  const [editThumbnailFile, setEditThumbnailFile] = useState<File | null>(null);
+  const [editThumbnailFilePreview, setEditThumbnailFilePreview] = useState<string | null>(null);
   const [isSavingEdit, setIsSavingEdit] = useState(false);
 
   useEffect(() => {
@@ -48,6 +54,9 @@ export const EditAssetModal: React.FC<EditAssetModalProps> = ({
       setEditTags(asset.tags.join(', '));
       setEditGithubUrl(asset.githubUrl || '');
       setEditIsDownloadable(asset.isDownloadable);
+      setEditThumbnailUrl(asset.thumbnailUrl || '');
+      setEditThumbnailFile(null);
+      setEditThumbnailMode('url');
 
       setEditVerticalIds(asset.verticals ? asset.verticals.map(v => v.id) : []);
       setEditTechStackIds(asset.techStacks ? asset.techStacks.map(t => t.id) : []);
@@ -56,16 +65,44 @@ export const EditAssetModal: React.FC<EditAssetModalProps> = ({
     }
   }, [asset]);
 
+  useEffect(() => {
+    if (!editThumbnailFile) {
+      setEditThumbnailFilePreview(null);
+      return;
+    }
+    const url = URL.createObjectURL(editThumbnailFile);
+    setEditThumbnailFilePreview(url);
+    return () => {
+      URL.revokeObjectURL(url);
+    };
+  }, [editThumbnailFile]);
+
   const toggleSelection = (list: string[], item: string) => {
     return list.includes(item) ? list.filter(i => i !== item) : [...list, item];
   };
 
+  const formatBytes = (bytes: number, decimals = 2) => {
+    if (bytes === 0) return '0 Bytes';
+    const k = 1024;
+    const dm = decimals < 0 ? 0 : decimals;
+    const sizes = ['Bytes', 'KB', 'MB', 'GB'];
+    const i = Math.floor(Math.log(bytes) / Math.log(k));
+    return parseFloat((bytes / Math.pow(k, i)).toFixed(dm)) + ' ' + sizes[i];
+  };
+
   const handleEditSubmit = async (e: React.FormEvent) => {
     e.preventDefault();
     if (!asset) return;
 
     setIsSavingEdit(true);
     try {
+      let finalThumbnailUrl: string | null = editThumbnailUrl.trim() || null;
+
+      if (editThumbnailMode === 'file' && editThumbnailFile) {
+        const uploadRes = await uploadThumbnail(editThumbnailFile);
+        finalThumbnailUrl = uploadRes.thumbnailUrl;
+      }
+
       await updateAsset(asset.id, {
         title: editTitle,
         description: editDescription,
@@ -78,6 +115,7 @@ export const EditAssetModal: React.FC<EditAssetModalProps> = ({
         tags: editTags.split(',').map(t => t.trim()).filter(Boolean),
         githubUrl: editGithubUrl,
         isDownloadable: editIsDownloadable,
+        thumbnailUrl: finalThumbnailUrl,
       });
       success('Changes saved successfully', 'Asset details have been updated.');
       onSuccess();
@@ -131,6 +169,107 @@ export const EditAssetModal: React.FC<EditAssetModalProps> = ({
             />
           </div>
 
+          <div>
+            <div className="flex items-center justify-between mb-1.5">
+              <label className="text-xs font-semibold text-ink-500">Thumbnail Banner (Optional)</label>
+              <div className="flex bg-ink-100 p-0.5 rounded-lg border border-ink-200 text-[11px]">
+                <button
+                  type="button"
+                  onClick={() => { setEditThumbnailMode('url'); setEditThumbnailFile(null); }}
+                  className={`px-2 py-0.5 font-medium rounded-md transition-all cursor-pointer ${editThumbnailMode === 'url' ? 'bg-ink-0 text-ink-900 shadow-xs border border-ink-200' : 'text-ink-500 hover:text-ink-800'}`}
+                >
+                  Image URL
+                </button>
+                <button
+                  type="button"
+                  onClick={() => { setEditThumbnailMode('file'); setEditThumbnailUrl(''); }}
+                  className={`px-2 py-0.5 font-medium rounded-md transition-all cursor-pointer ${editThumbnailMode === 'file' ? 'bg-ink-0 text-ink-900 shadow-xs border border-ink-200' : 'text-ink-500 hover:text-ink-800'}`}
+                >
+                  Upload File
+                </button>
+              </div>
+            </div>
+
+            {editThumbnailMode === 'url' ? (
+              <div className="flex gap-2">
+                <input
+                  type="url"
+                  value={editThumbnailUrl}
+                  onChange={(e) => setEditThumbnailUrl(e.target.value)}
+                  placeholder="https://example.com/image.png"
+                  className="flex-1 bg-ink-50 border border-ink-200 rounded-lg px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ink-900/10 text-ink-900 placeholder-ink-400"
+                />
+                {editThumbnailUrl && (
+                  <button
+                    type="button"
+                    onClick={() => setEditThumbnailUrl('')}
+                    className="px-2.5 py-2 rounded-lg bg-red-500/10 hover:bg-red-500/20 text-red-600 border border-red-200 text-xs font-semibold flex items-center gap-1 cursor-pointer"
+                    title="Remove Thumbnail"
+                  >
+                    <Trash2 className="w-3.5 h-3.5" />
+                    <span>Clear</span>
+                  </button>
+                )}
+              </div>
+            ) : (
+              <div className="border border-dashed border-ink-200 hover:border-ink-400 rounded-xl p-3 text-center transition-colors relative bg-ink-50">
+                {!editThumbnailFile ? (
+                  <div className="relative py-2">
+                    <input
+                      type="file"
+                      accept="image/*"
+                      onChange={(e) => {
+                        const file = e.target.files?.[0];
+                        if (file) {
+                          if (file.size > 2 * 1024 * 1024) {
+                            error('File Too Large', 'Thumbnail image size should be under 2MB.');
+                            return;
+                          }
+                          setEditThumbnailFile(file);
+                        }
+                      }}
+                      className="absolute inset-0 opacity-0 cursor-pointer z-10"
+                    />
+                    <UploadCloud className="w-6 h-6 text-ink-400 mx-auto mb-1" />
+                    <p className="text-xs font-bold text-ink-900">Click or drag thumbnail image to upload</p>
+                    <p className="text-[10px] text-ink-450 mt-0.5">PNG, JPG, WebP, GIF • Recommended size: 480×270px (Max 2MB)</p>
+                  </div>
+                ) : (
+                  <div className="relative flex items-center justify-between gap-3 p-1">
+                    {editThumbnailFilePreview && (
+                      <img src={editThumbnailFilePreview} alt="Thumb Preview" className="w-16 h-12 object-cover rounded-lg border border-ink-200 shadow-xs" />
+                    )}
+                    <div className="flex-1 text-left min-w-0">
+                      <p className="text-xs font-bold text-ink-900 truncate">{editThumbnailFile.name}</p>
+                      <p className="text-[10px] text-ink-500">{formatBytes(editThumbnailFile.size)} • Upload ready</p>
+                    </div>
+                    <button
+                      type="button"
+                      onClick={() => setEditThumbnailFile(null)}
+                      className="p-1 rounded-lg bg-ink-100 hover:bg-red-500/10 text-ink-500 hover:text-red-600 border border-ink-200 transition-colors cursor-pointer"
+                      title="Remove thumbnail"
+                    >
+                      <X className="w-3.5 h-3.5" />
+                    </button>
+                  </div>
+                )}
+              </div>
+            )}
+
+            {editThumbnailMode === 'url' && editThumbnailUrl && (
+              <div className="mt-2">
+                <label className="text-[11px] font-semibold text-ink-500 mb-1 block">Thumbnail Preview</label>
+                <div className="w-full h-28 border border-ink-200 rounded-lg overflow-hidden relative bg-ink-50">
+                  <img 
+                    src={getFullAssetUrl(editThumbnailUrl)} 
+                    alt="Thumbnail Preview" 
+                    className="w-full h-full object-cover"
+                  />
+                </div>
+              </div>
+            )}
+          </div>
+
           {/* 4-Group Taxonomy Demarcation Selection */}
           <div className="space-y-4 pt-3 pb-3 border-t border-b border-slate-200 dark:border-slate-800">
             <h4 className="text-xs font-bold uppercase tracking-wider text-slate-500 dark:text-slate-400">

Channel-Frontend/src/features/assets/components/UploadAssetModal.tsx

@@ -1,6 +1,7 @@
 import React, { useState, useEffect } from 'react';
 import { X, UploadCloud, Eye, FileText, File, Sparkles, Globe, Users } from 'lucide-react';
 import { uploadAsset, scrapeCaseStudy, getTaxonomyMeta, getOrganizations } from '../../../services/assets-api';
+import { getFullAssetUrl } from '../../../utils/asset-url';
 import type { TaxonomyMeta, Organization } from '../../../types/assets';
 import Modal from '../../../components/ui/Modal';
 import Button from '../../../components/ui/Button';
@@ -34,7 +35,10 @@ export const UploadAssetModal: React.FC<UploadAssetModalProps> = ({
   const [fullImagePreviewUrl, setFullImagePreviewUrl] = useState<string | null>(null);
   const [uploadUrl, setUploadUrl] = useState('');
   const [caseStudyUrl, setCaseStudyUrl] = useState('');
+  const [thumbnailMode, setThumbnailMode] = useState<'url' | 'file'>('url');
   const [thumbnailUrl, setThumbnailUrl] = useState('');
+  const [thumbnailFile, setThumbnailFile] = useState<File | null>(null);
+  const [thumbnailFilePreview, setThumbnailFilePreview] = useState<string | null>(null);
   const [problemStatement, setProblemStatement] = useState('');
   const [solution, setSolution] = useState('');
   const [isScraping, setIsScraping] = useState(false);
@@ -72,6 +76,18 @@ export const UploadAssetModal: React.FC<UploadAssetModalProps> = ({
     }
   }, [uploadFile]);
 
+  useEffect(() => {
+    if (!thumbnailFile) {
+      setThumbnailFilePreview(null);
+      return;
+    }
+    const url = URL.createObjectURL(thumbnailFile);
+    setThumbnailFilePreview(url);
+    return () => {
+      URL.revokeObjectURL(url);
+    };
+  }, [thumbnailFile]);
+
   const handleFetchCaseStudy = async () => {
     if (!caseStudyUrl) {
       error('URL Required', 'Please enter a case study URL first.');
@@ -180,7 +196,9 @@ export const UploadAssetModal: React.FC<UploadAssetModalProps> = ({
       formData.append('complianceIds', JSON.stringify(selectedComplianceIds));
     }
 
-    if (thumbnailUrl) {
+    if (thumbnailMode === 'file' && thumbnailFile) {
+      formData.append('thumbnail', thumbnailFile);
+    } else if (thumbnailUrl) {
       formData.append('thumbnailUrl', thumbnailUrl);
     }
     if (uploadTab === 'case_study') {
@@ -202,6 +220,9 @@ export const UploadAssetModal: React.FC<UploadAssetModalProps> = ({
       setUploadUrl('');
       setCaseStudyUrl('');
       setThumbnailUrl('');
+      setThumbnailFile(null);
+      setThumbnailFilePreview(null);
+      setThumbnailMode('url');
       setProblemStatement('');
       setSolution('');
       setUploadTitle('');
@@ -466,7 +487,27 @@ export const UploadAssetModal: React.FC<UploadAssetModalProps> = ({
           )}
 
           <div>
-            <label className="text-xs font-semibold text-ink-500 mb-1.5 block">Thumbnail Image URL (Optional)</label>
+            <div className="flex items-center justify-between mb-1.5">
+              <label className="text-xs font-semibold text-ink-500">Thumbnail Banner (Optional)</label>
+              <div className="flex bg-ink-100 p-0.5 rounded-lg border border-ink-200 text-[11px]">
+                <button
+                  type="button"
+                  onClick={() => { setThumbnailMode('url'); setThumbnailFile(null); }}
+                  className={`px-2 py-0.5 font-medium rounded-md transition-all cursor-pointer ${thumbnailMode === 'url' ? 'bg-ink-0 text-ink-900 shadow-xs border border-ink-200' : 'text-ink-500 hover:text-ink-800'}`}
+                >
+                  Image URL
+                </button>
+                <button
+                  type="button"
+                  onClick={() => { setThumbnailMode('file'); setThumbnailUrl(''); }}
+                  className={`px-2 py-0.5 font-medium rounded-md transition-all cursor-pointer ${thumbnailMode === 'file' ? 'bg-ink-0 text-ink-900 shadow-xs border border-ink-200' : 'text-ink-500 hover:text-ink-800'}`}
+                >
+                  Upload File
+                </button>
+              </div>
+            </div>
+
+            {thumbnailMode === 'url' ? (
               <input
                 type="url"
                 value={thumbnailUrl}
@@ -474,20 +515,64 @@ export const UploadAssetModal: React.FC<UploadAssetModalProps> = ({
                 placeholder="https://example.com/image.png"
                 className="w-full bg-ink-50 border border-ink-200 rounded-lg px-3 py-2 text-sm focus:outline-none focus:ring-2 focus:ring-ink-900/10 text-ink-900 placeholder-ink-400"
               />
+            ) : (
+              <div className="border border-dashed border-ink-200 hover:border-ink-400 rounded-xl p-3 text-center transition-colors relative bg-ink-50">
+                {!thumbnailFile ? (
+                  <div className="relative py-2">
+                    <input
+                      type="file"
+                      accept="image/*"
+                      onChange={(e) => {
+                        const file = e.target.files?.[0];
+                        if (file) {
+                          if (file.size > 2 * 1024 * 1024) {
+                            error('File Too Large', 'Thumbnail image size should be under 2MB.');
+                            return;
+                          }
+                          setThumbnailFile(file);
+                        }
+                      }}
+                      className="absolute inset-0 opacity-0 cursor-pointer z-10"
+                    />
+                    <UploadCloud className="w-6 h-6 text-ink-400 mx-auto mb-1" />
+                    <p className="text-xs font-bold text-ink-900">Click or drag thumbnail image to upload</p>
+                    <p className="text-[10px] text-ink-450 mt-0.5">PNG, JPG, WebP, GIF • Recommended size: 480×270px (Max 2MB)</p>
                   </div>
+                ) : (
+                  <div className="relative flex items-center justify-between gap-3 p-1">
+                    {thumbnailFilePreview && (
+                      <img src={thumbnailFilePreview} alt="Thumb Preview" className="w-16 h-12 object-cover rounded-lg border border-ink-200 shadow-xs" />
+                    )}
+                    <div className="flex-1 text-left min-w-0">
+                      <p className="text-xs font-bold text-ink-900 truncate">{thumbnailFile.name}</p>
+                      <p className="text-[10px] text-ink-500">{formatBytes(thumbnailFile.size)} • Upload ready</p>
+                    </div>
+                    <button
+                      type="button"
+                      onClick={() => setThumbnailFile(null)}
+                      className="p-1 rounded-lg bg-ink-100 hover:bg-red-500/10 text-ink-500 hover:text-red-600 border border-ink-200 transition-colors cursor-pointer"
+                      title="Remove thumbnail"
+                    >
+                      <X className="w-3.5 h-3.5" />
+                    </button>
+                  </div>
+                )}
+              </div>
+            )}
 
-          {thumbnailUrl && (
-            <div>
-              <label className="text-xs font-semibold text-ink-500 mb-1 block">Thumbnail Preview</label>
-              <div className="w-full h-32 border border-ink-200 rounded-lg overflow-hidden relative bg-ink-50">
+            {thumbnailMode === 'url' && thumbnailUrl && (
+              <div className="mt-2">
+                <label className="text-[11px] font-semibold text-ink-500 mb-1 block">Thumbnail Preview</label>
+                <div className="w-full h-28 border border-ink-200 rounded-lg overflow-hidden relative bg-ink-50">
                   <img 
-                  src={thumbnailUrl} 
+                    src={getFullAssetUrl(thumbnailUrl)} 
                     alt="Thumbnail Preview" 
                     className="w-full h-full object-cover"
                   />
                 </div>
               </div>
             )}
+          </div>
 
           <div>
             <label className="text-xs font-semibold text-ink-500 mb-1.5 block">Asset Title</label>

Channel-Frontend/src/services/assets-api.ts

@@ -28,6 +28,15 @@ export const uploadAsset = async (formData: FormData): Promise<void> => {
   });
 };
 
+export const uploadThumbnail = async (file: File): Promise<{ thumbnailUrl: string }> => {
+  const formData = new FormData();
+  formData.append('thumbnail', file);
+  const response = await axiosInstance.post<{ thumbnailUrl: string }>('/assets/upload-thumbnail', formData, {
+    headers: { 'Content-Type': 'multipart/form-data' }
+  });
+  return response.data;
+};
+
 export const updateAsset = async (
   id: string,
   payload: {
@@ -42,6 +51,7 @@ export const updateAsset = async (
     tags?: string[];
     githubUrl?: string;
     isDownloadable?: boolean;
+    thumbnailUrl?: string | null;
     shares?: Array<{ organizationId: string; userId: string | null }>;
   }
 ): Promise<void> => {

Channel-Frontend/src/utils/asset-url.ts

@@ -0,0 +1,22 @@
+import { axiosInstance } from '../services/axios';
+
+export const getFullAssetUrl = (url: string | null | undefined): string => {
+  if (!url) return '';
+  if (url.startsWith('http://') || url.startsWith('https://') || url.startsWith('data:')) {
+    return url;
+  }
+
+  const backendBase = axiosInstance.defaults.baseURL || '/api/v1';
+  const relativeHost = backendBase.replace('/api/v1', '');
+  let resolvedUrl = relativeHost.startsWith('/') || relativeHost === ''
+    ? `${window.location.origin}${relativeHost}${url}`
+    : `${relativeHost}${url}`;
+
+  const currentOrigin = window.location.origin;
+  const isCurrentOriginLocal = currentOrigin.includes('localhost') || currentOrigin.includes('127.0.0.1');
+  if (!isCurrentOriginLocal && (resolvedUrl.includes('localhost') || resolvedUrl.includes('127.0.0.1'))) {
+    resolvedUrl = resolvedUrl.replace(/https?:\/\/(localhost|127\.0\.0\.1)(:\d+)?/, currentOrigin);
+  }
+
+  return resolvedUrl;
+};