sync: PDF file upload from private repo

- Add drag-and-drop PDF upload to Quick Capture
- New upload endpoint with size limits (warn 10MB, reject 50MB)
- Add extractFromBuffer method to PaperExtractor
- Visual feedback: drag-over highlight, file preview card

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/api/extract/pdf/upload/route.ts

@@ -0,0 +1,104 @@
+import { NextRequest, NextResponse } from 'next/server';
+import { PaperExtractor } from '@/services/typescript/extractors/paper';
+
+export const runtime = 'nodejs';
+
+// Size limits in bytes
+const WARN_SIZE = 10 * 1024 * 1024; // 10MB
+const MAX_SIZE = 50 * 1024 * 1024;  // 50MB
+
+export async function POST(request: NextRequest) {
+  try {
+    const formData = await request.formData();
+    const file = formData.get('file');
+
+    // Validate file presence
+    if (!file || !(file instanceof File)) {
+      return NextResponse.json(
+        { success: false, error: 'PDF file is required' },
+        { status: 400 }
+      );
+    }
+
+    // Validate MIME type
+    if (file.type !== 'application/pdf') {
+      return NextResponse.json(
+        { success: false, error: `Invalid file type: ${file.type}. Only PDF files are accepted.` },
+        { status: 400 }
+      );
+    }
+
+    // Check file size
+    if (file.size > MAX_SIZE) {
+      return NextResponse.json(
+        { success: false, error: `File too large (${Math.round(file.size / 1024 / 1024)}MB). Maximum size is 50MB.` },
+        { status: 413 }
+      );
+    }
+
+    const isLargeFile = file.size > WARN_SIZE;
+
+    // Get buffer from file
+    const buffer = Buffer.from(await file.arrayBuffer());
+
+    // Extract PDF content using PaperExtractor
+    const extractor = new PaperExtractor();
+    const extraction = await extractor.extractFromBuffer(buffer, file.name);
+
+    // Derive title from metadata or filename
+    const title = extraction.metadata.title || file.name.replace(/\.pdf$/i, '');
+
+    // Create node via internal API call
+    // IMPORTANT: Use request.url origin for packaged Tauri app compatibility
+    const nodeApiUrl = new URL('/api/nodes', request.url);
+
+    const createResponse = await fetch(nodeApiUrl.toString(), {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({
+        title,
+        type: 'pdf',
+        // Keep content readable in UI (not the full extracted text)
+        content: `Imported PDF: ${file.name} (${extraction.metadata.pages} pages, ${Math.round(extraction.metadata.text_length / 1000)}k characters)`,
+        // Full extracted text goes in chunk for universal chunking/embedding
+        chunk: extraction.chunk,
+        metadata: {
+          source: 'pdf_upload',
+          original_filename: file.name,
+          pages: extraction.metadata.pages,
+          text_length: extraction.metadata.text_length,
+          extraction_method: extraction.metadata.extraction_method,
+          imported_at: new Date().toISOString(),
+        },
+      }),
+    });
+
+    if (!createResponse.ok) {
+      const errorData = await createResponse.json().catch(() => ({}));
+      throw new Error(errorData.error || `Failed to create node: ${createResponse.status}`);
+    }
+
+    const nodeResult = await createResponse.json();
+
+    if (!nodeResult.success || !nodeResult.data?.id) {
+      throw new Error(nodeResult.error || 'Failed to create node');
+    }
+
+    return NextResponse.json({
+      success: true,
+      nodeId: nodeResult.data.id,
+      title,
+      pages: extraction.metadata.pages,
+      textLength: extraction.metadata.text_length,
+      warning: isLargeFile ? `Large file (${Math.round(file.size / 1024 / 1024)}MB) - processing may take longer` : undefined,
+    });
+
+  } catch (error) {
+    console.error('[PDF Upload API] Error:', error);
+    const message = error instanceof Error ? error.message : 'Failed to process PDF upload';
+    return NextResponse.json(
+      { success: false, error: message },
+      { status: 500 }
+    );
+  }
+}

src/components/agents/QuickAddInput.tsx

@@ -1,6 +1,6 @@
 "use client";
 
-import { useState } from 'react';
+import { useState, useCallback } from 'react';
 import type { AgentDelegation } from '@/services/agents/delegation';
 
 interface QuickAddSubmitPayload {
@@ -18,6 +18,9 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
   const [input, setInput] = useState('');
   const [isPosting, setIsPosting] = useState(false);
   const [isExpanded, setIsExpanded] = useState(false);
+  const [dragOver, setDragOver] = useState(false);
+  const [uploadedFile, setUploadedFile] = useState<File | null>(null);
+  const [uploadError, setUploadError] = useState<string | null>(null);
 
   const maxConcurrent = 5;
   const activeCount = activeDelegations.filter(
@@ -25,7 +28,51 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
   ).length;
   const isSoftLimited = activeCount >= maxConcurrent;
 
+  const handleFileUpload = useCallback(async (file: File) => {
+    setIsPosting(true);
+    setUploadError(null);
+
+    try {
+      const formData = new FormData();
+      formData.append('file', file);
+
+      const response = await fetch('/api/extract/pdf/upload', {
+        method: 'POST',
+        body: formData,
+      });
+
+      const result = await response.json();
+
+      if (!response.ok || !result.success) {
+        throw new Error(result.error || 'Upload failed');
+      }
+
+      // Success - clear state
+      setUploadedFile(null);
+      setInput('');
+      setIsExpanded(false);
+
+      // Show warning if present (large file)
+      if (result.warning) {
+        console.log('[QuickAddInput] Upload warning:', result.warning);
+      }
+
+    } catch (error) {
+      console.error('[QuickAddInput] Upload error:', error);
+      setUploadError(error instanceof Error ? error.message : 'Upload failed');
+    } finally {
+      setIsPosting(false);
+    }
+  }, []);
+
   const handleSubmit = async () => {
+    // If there's a file, upload it
+    if (uploadedFile) {
+      await handleFileUpload(uploadedFile);
+      return;
+    }
+
+    // Otherwise, submit text as before
     if (!input.trim() || isPosting || isSoftLimited) return;
 
     setIsPosting(true);
@@ -52,9 +99,56 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
     if (e.key === 'Escape') {
       setIsExpanded(false);
       setInput('');
+      setUploadedFile(null);
+      setUploadError(null);
     }
   };
 
+  const handleDragOver = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setDragOver(true);
+  }, []);
+
+  const handleDragLeave = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setDragOver(false);
+  }, []);
+
+  const handleDrop = useCallback((e: React.DragEvent) => {
+    e.preventDefault();
+    e.stopPropagation();
+    setDragOver(false);
+    setUploadError(null);
+
+    const file = e.dataTransfer?.files[0];
+    if (!file) return;
+
+    // Check if it's a PDF
+    if (file.type !== 'application/pdf' && !file.name.toLowerCase().endsWith('.pdf')) {
+      setUploadError('Only PDF files are supported');
+      return;
+    }
+
+    // Check size (50MB limit)
+    const MAX_SIZE = 50 * 1024 * 1024;
+    if (file.size > MAX_SIZE) {
+      setUploadError(`File too large (${Math.round(file.size / 1024 / 1024)}MB). Maximum is 50MB.`);
+      return;
+    }
+
+    setUploadedFile(file);
+    setInput(''); // Clear text input when file is dropped
+  }, []);
+
+  const clearFile = useCallback(() => {
+    setUploadedFile(null);
+    setUploadError(null);
+  }, []);
+
+  const hasContent = input.trim() || uploadedFile;
+
   // Collapsed state - prominent "ADD STUFF" button
   if (!isExpanded) {
     return (
@@ -109,7 +203,8 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
 
   // Expanded state - full width overlay
   return (
-    <div style={{
+    <div
+      style={{
         position: 'absolute',
         top: '60px',
         left: '20px',
@@ -120,10 +215,15 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
         background: '#0a0a0a',
         padding: '16px',
         borderRadius: '12px',
-      border: '1px solid #2a2a2a',
+        border: dragOver ? '1px solid #22c55e' : '1px solid #2a2a2a',
         zIndex: 100,
-      animation: 'fadeIn 150ms ease-out'
+        animation: 'fadeIn 150ms ease-out',
-    }}>
+        transition: 'border-color 0.15s ease'
+      }}
+      onDragOver={handleDragOver}
+      onDragLeave={handleDragLeave}
+      onDrop={handleDrop}
+    >
       {/* Header */}
       <div style={{
         display: 'flex',
@@ -160,6 +260,8 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
           onClick={() => {
             setIsExpanded(false);
             setInput('');
+            setUploadedFile(null);
+            setUploadError(null);
           }}
           style={{
             padding: '6px',
@@ -182,13 +284,144 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
         </button>
       </div>
 
-      {/* Input area - expanded */}
+      {/* File preview (when a file is dropped) */}
-      <div style={{ position: 'relative' }}>
+      {uploadedFile && (
+        <div style={{
+          display: 'flex',
+          alignItems: 'center',
+          gap: '12px',
+          padding: '12px 14px',
+          background: '#0f1a0f',
+          border: '1px solid #1a3a1a',
+          borderRadius: '10px',
+        }}>
+          {/* PDF icon */}
+          <div style={{
+            width: '40px',
+            height: '40px',
+            borderRadius: '8px',
+            background: 'rgba(239, 68, 68, 0.1)',
+            border: '1px solid rgba(239, 68, 68, 0.2)',
+            display: 'flex',
+            alignItems: 'center',
+            justifyContent: 'center',
+            flexShrink: 0
+          }}>
+            <svg width="20" height="20" viewBox="0 0 24 24" fill="none" stroke="#ef4444" strokeWidth="1.5">
+              <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" strokeLinecap="round" strokeLinejoin="round"/>
+              <polyline points="14 2 14 8 20 8" strokeLinecap="round" strokeLinejoin="round"/>
+              <line x1="16" y1="13" x2="8" y2="13" strokeLinecap="round"/>
+              <line x1="16" y1="17" x2="8" y2="17" strokeLinecap="round"/>
+            </svg>
+          </div>
+
+          {/* File info */}
+          <div style={{ flex: 1, minWidth: 0 }}>
+            <div style={{
+              color: '#e5e5e5',
+              fontSize: '13px',
+              fontWeight: 500,
+              overflow: 'hidden',
+              textOverflow: 'ellipsis',
+              whiteSpace: 'nowrap'
+            }}>
+              {uploadedFile.name}
+            </div>
+            <div style={{
+              color: '#666',
+              fontSize: '11px',
+              marginTop: '2px'
+            }}>
+              {uploadedFile.size < 1024 * 1024
+                ? `${Math.round(uploadedFile.size / 1024)} KB`
+                : `${(uploadedFile.size / 1024 / 1024).toFixed(1)} MB`}
+            </div>
+          </div>
+
+          {/* Remove button */}
+          <button
+            onClick={clearFile}
+            style={{
+              padding: '6px',
+              background: 'transparent',
+              border: 'none',
+              color: '#666',
+              cursor: 'pointer',
+              borderRadius: '6px',
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              transition: 'color 0.15s ease'
+            }}
+            onMouseEnter={(e) => { e.currentTarget.style.color = '#ef4444'; }}
+            onMouseLeave={(e) => { e.currentTarget.style.color = '#666'; }}
+          >
+            <svg width="14" height="14" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="2">
+              <path d="M18 6L6 18M6 6l12 12" strokeLinecap="round" strokeLinejoin="round" />
+            </svg>
+          </button>
+        </div>
+      )}
+
+      {/* Error message */}
+      {uploadError && (
+        <div style={{
+          padding: '10px 12px',
+          background: 'rgba(239, 68, 68, 0.1)',
+          border: '1px solid rgba(239, 68, 68, 0.2)',
+          borderRadius: '8px',
+          color: '#ef4444',
+          fontSize: '12px',
+        }}>
+          {uploadError}
+        </div>
+      )}
+
+      {/* Input area - show if no file uploaded */}
+      {!uploadedFile && (
+        <div
+          style={{
+            position: 'relative',
+            borderRadius: '10px',
+            border: dragOver ? '2px dashed #22c55e' : '1px solid #1f1f1f',
+            background: dragOver ? 'rgba(34, 197, 94, 0.05)' : '#0a0a0a',
+            transition: 'all 0.15s ease'
+          }}
+        >
+          {/* Drag overlay */}
+          {dragOver && (
+            <div style={{
+              position: 'absolute',
+              inset: 0,
+              display: 'flex',
+              alignItems: 'center',
+              justifyContent: 'center',
+              background: 'rgba(34, 197, 94, 0.05)',
+              borderRadius: '10px',
+              zIndex: 10,
+              pointerEvents: 'none'
+            }}>
+              <div style={{
+                display: 'flex',
+                flexDirection: 'column',
+                alignItems: 'center',
+                gap: '8px',
+                color: '#22c55e'
+              }}>
+                <svg width="32" height="32" viewBox="0 0 24 24" fill="none" stroke="currentColor" strokeWidth="1.5">
+                  <path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z" strokeLinecap="round" strokeLinejoin="round"/>
+                  <polyline points="14 2 14 8 20 8" strokeLinecap="round" strokeLinejoin="round"/>
+                </svg>
+                <span style={{ fontSize: '13px', fontWeight: 500 }}>Drop PDF here</span>
+              </div>
+            </div>
+          )}
+
           <textarea
             value={input}
             onChange={(e) => setInput(e.target.value)}
             onKeyDown={handleKeyDown}
-          placeholder="Paste a URL, note, or transcript — RA-H will figure out what it is."
+            placeholder="Paste a URL, note, or transcript — or drop a PDF file"
             disabled={isPosting || isSoftLimited}
             autoFocus
             style={{
@@ -196,34 +429,29 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
               minHeight: '140px',
               maxHeight: '300px',
               padding: '14px 16px',
-            background: '#0a0a0a',
+              background: 'transparent',
-            border: '1px solid #1f1f1f',
+              border: 'none',
-            borderRadius: '10px',
               color: '#e5e5e5',
               fontSize: '14px',
               fontFamily: 'inherit',
               outline: 'none',
               resize: 'none',
               lineHeight: '1.6',
-            transition: 'border-color 0.15s ease'
+              opacity: dragOver ? 0.3 : 1,
-          }}
+              transition: 'opacity 0.15s ease'
-          onFocus={(e) => {
-            e.currentTarget.style.borderColor = '#333';
-          }}
-          onBlur={(e) => {
-            e.currentTarget.style.borderColor = '#1f1f1f';
             }}
           />
         </div>
+      )}
 
       {/* Footer */}
       <div style={{ display: 'flex', alignItems: 'center', justifyContent: 'space-between' }}>
         <span style={{ fontSize: '11px', color: '#525252' }}>
-          ⌘↵ to submit · esc to close
+          {uploadedFile ? 'Ready to upload' : '\u2318\u21B5 to submit \u00B7 esc to close'}
         </span>
         <button
           onClick={handleSubmit}
-          disabled={!input.trim() || isPosting || isSoftLimited}
+          disabled={!hasContent || isPosting || isSoftLimited}
           style={{
             width: '38px',
             height: '38px',
@@ -231,15 +459,15 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
             alignItems: 'center',
             justifyContent: 'center',
             padding: '0',
-            background: input.trim() && !isPosting ? '#22c55e' : '#262626',
+            background: hasContent && !isPosting ? '#22c55e' : '#262626',
             border: 'none',
             borderRadius: '50%',
-            cursor: input.trim() && !isPosting ? 'pointer' : 'not-allowed',
+            cursor: hasContent && !isPosting ? 'pointer' : 'not-allowed',
             transition: 'all 0.2s ease',
-            boxShadow: input.trim() && !isPosting ? '0 0 0 0 rgba(34, 197, 94, 0)' : 'none'
+            boxShadow: hasContent && !isPosting ? '0 0 0 0 rgba(34, 197, 94, 0)' : 'none'
           }}
           onMouseEnter={(e) => {
-            if (input.trim() && !isPosting) {
+            if (hasContent && !isPosting) {
               e.currentTarget.style.transform = 'translateY(-2px)';
               e.currentTarget.style.boxShadow = '0 4px 12px rgba(34, 197, 94, 0.3)';
             }
@@ -259,7 +487,7 @@ export default function QuickAddInput({ activeDelegations, onSubmit }: QuickAddI
               animation: 'spin 0.8s linear infinite'
             }} />
           ) : (
-            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke={input.trim() ? '#0a0a0a' : '#525252'} strokeWidth="2.5" strokeLinecap="round" strokeLinejoin="round">
+            <svg width="16" height="16" viewBox="0 0 24 24" fill="none" stroke={hasContent ? '#0a0a0a' : '#525252'} strokeWidth="2.5" strokeLinecap="round" strokeLinejoin="round">
               <path d="M12 19V5"/>
               <path d="M5 12l7-7 7 7"/>
             </svg>

src/services/typescript/extractors/paper.ts

@@ -28,6 +28,13 @@ interface ExtractionResult {
   url: string;
 }
 
+interface BufferExtractionResult {
+  content: string;
+  chunk: string;
+  metadata: PaperMetadata;
+  filename: string;
+}
+
 type PdfJsTextItem = {
   str?: string;
 };
@@ -341,6 +348,41 @@ export class PaperExtractor {
     }
   }
 
+  /**
+   * Extract text from a PDF buffer (for file uploads)
+   * @param buffer - The PDF file contents as a Buffer
+   * @param filename - Optional original filename for metadata
+   */
+  async extractFromBuffer(buffer: Buffer, filename?: string): Promise<BufferExtractionResult> {
+    // Validate PDF header
+    if (!this.isLikelyPdf(buffer)) {
+      const preview = buffer.slice(0, 64).toString('utf8');
+      throw new Error(`File does not appear to be a valid PDF (header: ${preview.substring(0, 20)}...)`);
+    }
+
+    // Extract text and metadata using existing private method
+    const { text, metadata } = await this.extractFromPDF(buffer);
+
+    // Clean the text
+    const cleanedText = this.cleanAcademicContent(text);
+
+    // Add filename to metadata
+    metadata.filename = filename || 'uploaded.pdf';
+    if (!metadata.extraction_method) {
+      metadata.extraction_method = 'typescript_pdf-parse';
+    }
+
+    // Format content for display
+    const content = this.formatContent(metadata, cleanedText);
+
+    return {
+      content,
+      chunk: cleanedText,
+      metadata,
+      filename: metadata.filename,
+    };
+  }
+
   private formatErrorMessage(error: unknown): string {
     if (error instanceof Error) {
       return error.message;