feat: Add PDF export functionality to report preview by integrating html2pdf.js and updating the UI.

frontend/package-lock.json

@@ -11,6 +11,7 @@
         "@langchain/core": "^1.1.18",
         "@langchain/langgraph": "^1.1.2",
         "@langchain/langgraph-sdk": "^1.5.5",
+        "html2pdf.js": "^0.14.0",
         "lucide-react": "^0.563.0",
         "next": "16.1.6",
         "react": "19.2.3",
@@ -233,6 +234,15 @@
         "node": ">=6.0.0"
       }
     },
+    "node_modules/@babel/runtime": {
+      "version": "7.28.6",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.28.6.tgz",
+      "integrity": "sha512-05WQkdpL9COIMz4LjTxGpPNCdlpyimKppYNoJ5Di5EUObifl8t4tuLuUBBZEpoLYOmfvIWrsp9fCl0HoPRVTdA==",
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@babel/template": {
       "version": "7.28.6",
       "resolved": "https://registry.npmjs.org/@babel/template/-/template-7.28.6.tgz",
@@ -1786,6 +1796,19 @@
         "undici-types": "~6.21.0"
       }
     },
+    "node_modules/@types/pako": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/@types/pako/-/pako-2.0.4.tgz",
+      "integrity": "sha512-VWDCbrLeVXJM9fihYodcLiIv0ku+AlOa/TQ1SvYOaBuyrSKgEcro95LJyIsJ4vSo6BXIxOKxiJAat04CmST9Fw==",
+      "license": "MIT"
+    },
+    "node_modules/@types/raf": {
+      "version": "3.4.3",
+      "resolved": "https://registry.npmjs.org/@types/raf/-/raf-3.4.3.tgz",
+      "integrity": "sha512-c4YAvMedbPZ5tEyxzQdMoOhhJ4RD3rngZIdwC2/qDN3d7JpEhB6fiBRKVY1lg5B7Wk+uPBjn5f39j1/2MY1oOw==",
+      "license": "MIT",
+      "optional": true
+    },
     "node_modules/@types/react": {
       "version": "19.2.10",
       "resolved": "https://registry.npmjs.org/@types/react/-/react-19.2.10.tgz",
@@ -1805,6 +1828,13 @@
         "@types/react": "^19.2.0"
       }
     },
+    "node_modules/@types/trusted-types": {
+      "version": "2.0.7",
+      "resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.7.tgz",
+      "integrity": "sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==",
+      "license": "MIT",
+      "optional": true
+    },
     "node_modules/@types/unist": {
       "version": "3.0.3",
       "resolved": "https://registry.npmjs.org/@types/unist/-/unist-3.0.3.tgz",
@@ -2663,6 +2693,15 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/base64-arraybuffer": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/base64-arraybuffer/-/base64-arraybuffer-1.0.2.tgz",
+      "integrity": "sha512-I3yl4r9QB5ZRY3XuJVEPfc2XhZO6YweFPI+UovAzn+8/hb3oJ6lnysaFcjVpkCPfVWFUDvoZ8kmVDP7WyRtYtQ==",
+      "license": "MIT",
+      "engines": {
+        "node": ">= 0.6.0"
+      }
+    },
     "node_modules/base64-js": {
       "version": "1.5.1",
       "resolved": "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz",
@@ -2842,6 +2881,26 @@
       ],
       "license": "CC-BY-4.0"
     },
+    "node_modules/canvg": {
+      "version": "3.0.11",
+      "resolved": "https://registry.npmjs.org/canvg/-/canvg-3.0.11.tgz",
+      "integrity": "sha512-5ON+q7jCTgMp9cjpu4Jo6XbvfYwSB2Ow3kzHKfIyJfaCAOHLbdKPQqGKgfED/R5B+3TFFfe8pegYA+b423SRyA==",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "@babel/runtime": "^7.12.5",
+        "@types/raf": "^3.4.0",
+        "core-js": "^3.8.3",
+        "raf": "^3.4.1",
+        "regenerator-runtime": "^0.13.7",
+        "rgbcolor": "^1.0.1",
+        "stackblur-canvas": "^2.0.0",
+        "svg-pathdata": "^6.0.3"
+      },
+      "engines": {
+        "node": ">=10.0.0"
+      }
+    },
     "node_modules/ccount": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/ccount/-/ccount-2.0.1.tgz",
@@ -2965,6 +3024,18 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/core-js": {
+      "version": "3.48.0",
+      "resolved": "https://registry.npmjs.org/core-js/-/core-js-3.48.0.tgz",
+      "integrity": "sha512-zpEHTy1fjTMZCKLHUZoVeylt9XrzaIN2rbPXEt0k+q7JE5CkCZdo6bNq55bn24a69CH7ErAVLKijxJja4fw+UQ==",
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "funding": {
+        "type": "opencollective",
+        "url": "https://opencollective.com/core-js"
+      }
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
@@ -2980,6 +3051,15 @@
         "node": ">= 8"
       }
     },
+    "node_modules/css-line-break": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/css-line-break/-/css-line-break-2.1.0.tgz",
+      "integrity": "sha512-FHcKFCZcAha3LwfVBhCQbW2nCNbkZXn7KVUJcsT5/P8YmfsVja0FMPJr0B903j/E69HUphKiV9iQArX8SDYA4w==",
+      "license": "MIT",
+      "dependencies": {
+        "utrie": "^1.0.2"
+      }
+    },
     "node_modules/csstype": {
       "version": "3.2.3",
       "resolved": "https://registry.npmjs.org/csstype/-/csstype-3.2.3.tgz",
@@ -3174,6 +3254,15 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/dompurify": {
+      "version": "3.3.1",
+      "resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.3.1.tgz",
+      "integrity": "sha512-qkdCKzLNtrgPFP1Vo+98FRzJnBRGe4ffyCea9IwHB1fyxPOeNTHpLKYGd4Uk9xvNoH0ZoOjwZxNptyMwqrId1Q==",
+      "license": "(MPL-2.0 OR Apache-2.0)",
+      "optionalDependencies": {
+        "@types/trusted-types": "^2.0.7"
+      }
+    },
     "node_modules/dunder-proto": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/dunder-proto/-/dunder-proto-1.0.1.tgz",
@@ -3914,6 +4003,17 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/fast-png": {
+      "version": "6.4.0",
+      "resolved": "https://registry.npmjs.org/fast-png/-/fast-png-6.4.0.tgz",
+      "integrity": "sha512-kAqZq1TlgBjZcLr5mcN6NP5Rv4V2f22z00c3g8vRrwkcqjerx7BEhPbOnWCPqaHUl2XWQBJQvOT/FQhdMT7X/Q==",
+      "license": "MIT",
+      "dependencies": {
+        "@types/pako": "^2.0.3",
+        "iobuffer": "^5.3.2",
+        "pako": "^2.1.0"
+      }
+    },
     "node_modules/fastq": {
       "version": "1.20.1",
       "resolved": "https://registry.npmjs.org/fastq/-/fastq-1.20.1.tgz",
@@ -3924,6 +4024,12 @@
         "reusify": "^1.0.4"
       }
     },
+    "node_modules/fflate": {
+      "version": "0.8.2",
+      "resolved": "https://registry.npmjs.org/fflate/-/fflate-0.8.2.tgz",
+      "integrity": "sha512-cPJU47OaAoCbg0pBvzsgpTPhmhqI5eJjh/JIu8tPj5q+T7iLvW/JAYUqmE7KOB4R1ZyEhzBaIQpQpardBF5z8A==",
+      "license": "MIT"
+    },
     "node_modules/file-entry-cache": {
       "version": "8.0.0",
       "resolved": "https://registry.npmjs.org/file-entry-cache/-/file-entry-cache-8.0.0.tgz",
@@ -4358,6 +4464,30 @@
         "url": "https://opencollective.com/unified"
       }
     },
+    "node_modules/html2canvas": {
+      "version": "1.4.1",
+      "resolved": "https://registry.npmjs.org/html2canvas/-/html2canvas-1.4.1.tgz",
+      "integrity": "sha512-fPU6BHNpsyIhr8yyMpTLLxAbkaK8ArIBcmZIRiBLiDhjeqvXolaEmDGmELFuX9I4xDcaKKcJl+TKZLqruBbmWA==",
+      "license": "MIT",
+      "dependencies": {
+        "css-line-break": "^2.1.0",
+        "text-segmentation": "^1.0.3"
+      },
+      "engines": {
+        "node": ">=8.0.0"
+      }
+    },
+    "node_modules/html2pdf.js": {
+      "version": "0.14.0",
+      "resolved": "https://registry.npmjs.org/html2pdf.js/-/html2pdf.js-0.14.0.tgz",
+      "integrity": "sha512-yvNJgE/8yru2UeGflkPdjW8YEY+nDH5X7/2WG4uiuSCwYiCp8PZ8EKNiTAa6HxJ1NjC51fZSIEq6xld5CADKBQ==",
+      "license": "MIT",
+      "dependencies": {
+        "dompurify": "^3.3.1",
+        "html2canvas": "^1.0.0",
+        "jspdf": "^4.0.0"
+      }
+    },
     "node_modules/ignore": {
       "version": "5.3.2",
       "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.3.2.tgz",
@@ -4416,6 +4546,12 @@
         "node": ">= 0.4"
       }
     },
+    "node_modules/iobuffer": {
+      "version": "5.4.0",
+      "resolved": "https://registry.npmjs.org/iobuffer/-/iobuffer-5.4.0.tgz",
+      "integrity": "sha512-DRebOWuqDvxunfkNJAlc3IzWIPD5xVxwUNbHr7xKB8E6aLJxIPfNX3CoMJghcFjpv6RWQsrcJbghtEwSPoJqMA==",
+      "license": "MIT"
+    },
     "node_modules/is-alphabetical": {
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/is-alphabetical/-/is-alphabetical-2.0.1.tgz",
@@ -5017,6 +5153,23 @@
         "node": ">=6"
       }
     },
+    "node_modules/jspdf": {
+      "version": "4.1.0",
+      "resolved": "https://registry.npmjs.org/jspdf/-/jspdf-4.1.0.tgz",
+      "integrity": "sha512-xd1d/XRkwqnsq6FP3zH1Q+Ejqn2ULIJeDZ+FTKpaabVpZREjsJKRJwuokTNgdqOU+fl55KgbvgZ1pRTSWCP2kQ==",
+      "license": "MIT",
+      "dependencies": {
+        "@babel/runtime": "^7.28.4",
+        "fast-png": "^6.2.0",
+        "fflate": "^0.8.1"
+      },
+      "optionalDependencies": {
+        "canvg": "^3.0.11",
+        "core-js": "^3.6.0",
+        "dompurify": "^3.3.1",
+        "html2canvas": "^1.0.0-rc.5"
+      }
+    },
     "node_modules/jsx-ast-utils": {
       "version": "3.3.5",
       "resolved": "https://registry.npmjs.org/jsx-ast-utils/-/jsx-ast-utils-3.3.5.tgz",
@@ -6545,6 +6698,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/pako": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/pako/-/pako-2.1.0.tgz",
+      "integrity": "sha512-w+eufiZ1WuJYgPXbV/PO3NCMEc3xqylkKHzp8bxp1uW4qaSNQUkwmLLEc3kKsfz8lpV1F8Ht3U1Cm+9Srog2ug==",
+      "license": "(MIT AND Zlib)"
+    },
     "node_modules/parent-module": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/parent-module/-/parent-module-1.0.1.tgz",
@@ -6610,6 +6769,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/performance-now": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
+      "integrity": "sha512-7EAHlyLHI56VEIdK57uwHdHKIaAGbnXPiw0yWbarQZOKaKpvUIgW0jWRVLiatnM+XXlSwsanIBH/hzGMJulMow==",
+      "license": "MIT",
+      "optional": true
+    },
     "node_modules/picocolors": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
@@ -6731,6 +6897,16 @@
       ],
       "license": "MIT"
     },
+    "node_modules/raf": {
+      "version": "3.4.1",
+      "resolved": "https://registry.npmjs.org/raf/-/raf-3.4.1.tgz",
+      "integrity": "sha512-Sq4CW4QhwOHE8ucn6J34MqtZCeWFP2aQSmrlroYgqAV1PjStIhJXxYuTgUIfkEk7zTLjmIjLmU5q+fbD1NnOJA==",
+      "license": "MIT",
+      "optional": true,
+      "dependencies": {
+        "performance-now": "^2.1.0"
+      }
+    },
     "node_modules/react": {
       "version": "19.2.3",
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.3.tgz",
@@ -6809,6 +6985,13 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/regenerator-runtime": {
+      "version": "0.13.11",
+      "resolved": "https://registry.npmjs.org/regenerator-runtime/-/regenerator-runtime-0.13.11.tgz",
+      "integrity": "sha512-kY1AZVr2Ra+t+piVaJ4gxaFaReZVH40AKNo7UCX6W+dEwBo/2oZJzqfuN1qLq1oL45o56cPaTXELwrTh8Fpggg==",
+      "license": "MIT",
+      "optional": true
+    },
     "node_modules/regexp.prototype.flags": {
       "version": "1.5.4",
       "resolved": "https://registry.npmjs.org/regexp.prototype.flags/-/regexp.prototype.flags-1.5.4.tgz",
@@ -6915,6 +7098,16 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/rgbcolor": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/rgbcolor/-/rgbcolor-1.0.1.tgz",
+      "integrity": "sha512-9aZLIrhRaD97sgVhtJOW6ckOEh6/GnvQtdVNfdZ6s67+3/XwLS9lBcQYzEEhYVeUowN7pRzMLsyGhK2i/xvWbw==",
+      "license": "MIT OR SEE LICENSE IN FEEL-FREE.md",
+      "optional": true,
+      "engines": {
+        "node": ">= 0.8.15"
+      }
+    },
     "node_modules/run-parallel": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/run-parallel/-/run-parallel-1.2.0.tgz",
@@ -7248,6 +7441,16 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/stackblur-canvas": {
+      "version": "2.7.0",
+      "resolved": "https://registry.npmjs.org/stackblur-canvas/-/stackblur-canvas-2.7.0.tgz",
+      "integrity": "sha512-yf7OENo23AGJhBriGx0QivY5JP6Y1HbrrDI6WLt6C5auYZXlQrheoY8hD4ibekFKz1HOfE48Ww8kMWMnJD/zcQ==",
+      "license": "MIT",
+      "optional": true,
+      "engines": {
+        "node": ">=0.1.14"
+      }
+    },
     "node_modules/stop-iteration-iterator": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/stop-iteration-iterator/-/stop-iteration-iterator-1.1.0.tgz",
@@ -7478,6 +7681,16 @@
         "url": "https://github.com/sponsors/ljharb"
       }
     },
+    "node_modules/svg-pathdata": {
+      "version": "6.0.3",
+      "resolved": "https://registry.npmjs.org/svg-pathdata/-/svg-pathdata-6.0.3.tgz",
+      "integrity": "sha512-qsjeeq5YjBZ5eMdFuUa4ZosMLxgr5RZ+F+Y1OrDhuOCEInRMA3x74XdBtggJcj9kOeInz0WE+LgCPDkZFlBYJw==",
+      "license": "MIT",
+      "optional": true,
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/tailwindcss": {
       "version": "4.1.18",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.1.18.tgz",
@@ -7499,6 +7712,15 @@
         "url": "https://opencollective.com/webpack"
       }
     },
+    "node_modules/text-segmentation": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/text-segmentation/-/text-segmentation-1.0.3.tgz",
+      "integrity": "sha512-iOiPUo/BGnZ6+54OsWxZidGCsdU8YbE4PSpdPinp7DeMtUJNJBoJ/ouUSTJjHkh1KntHaltHl/gDs2FC4i5+Nw==",
+      "license": "MIT",
+      "dependencies": {
+        "utrie": "^1.0.2"
+      }
+    },
     "node_modules/tinyglobby": {
       "version": "0.2.15",
       "resolved": "https://registry.npmjs.org/tinyglobby/-/tinyglobby-0.2.15.tgz",
@@ -7943,6 +8165,15 @@
         "punycode": "^2.1.0"
       }
     },
+    "node_modules/utrie": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/utrie/-/utrie-1.0.2.tgz",
+      "integrity": "sha512-1MLa5ouZiOmQzUbjbu9VmjLzn1QLXBhwpUa7kdLUQK+KQ5KA9I1vk5U4YHe/X2Ch7PYnJfWuWT+VbuxbGwljhw==",
+      "license": "MIT",
+      "dependencies": {
+        "base64-arraybuffer": "^1.0.2"
+      }
+    },
     "node_modules/uuid": {
       "version": "13.0.0",
       "resolved": "https://registry.npmjs.org/uuid/-/uuid-13.0.0.tgz",

frontend/package.json

@@ -12,6 +12,7 @@
     "@langchain/core": "^1.1.18",
     "@langchain/langgraph": "^1.1.2",
     "@langchain/langgraph-sdk": "^1.5.5",
+    "html2pdf.js": "^0.14.0",
     "lucide-react": "^0.563.0",
     "next": "16.1.6",
     "react": "19.2.3",

frontend/src/registry/ReportPreview.tsx

@@ -1,7 +1,8 @@
 "use client";
 
+import React from "react";
 import ReactMarkdown from "react-markdown";
-import { FileText, Download, Send, Loader2, AlertCircle, CheckCircle } from "lucide-react";
+import { FileText, Download, Send, Loader2, AlertCircle } from "lucide-react";
 
 interface ReportPreviewProps {
   id?: string;
@@ -17,9 +18,53 @@ export function ReportPreview({ title, content, status, doctorName, doctorEmail,
   const isComplete = status === "complete";
   const isStreaming = status === "streaming" || status === "loading";
   const canSend = isComplete && !!doctorEmail;
+  const [isExporting, setIsExporting] = React.useState(false);
+
+  const handleExportPDF = async () => {
+    if (!content || isExporting) return;
+    setIsExporting(true);
+    try {
+      const html2pdf = (await import("html2pdf.js")).default;
+      const dateStr = new Date().toLocaleDateString("en-GB", {
+        day: "numeric",
+        month: "long",
+        year: "numeric",
+      });
+
+      const container = document.createElement("div");
+      container.innerHTML = `
+        <div style="font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; max-width: 700px; margin: 0 auto; padding: 32px; color: #1a1a1a; line-height: 1.8;">
+          <h1 style="font-size: 1.5rem; border-bottom: 2px solid #b39cd0; padding-bottom: 8px; margin-bottom: 4px;">${title}</h1>
+          <p style="color: #666; font-size: 0.85rem; margin-bottom: 24px;">Generated ${dateStr}${doctorName ? ` · For ${doctorName}` : ""}</p>
+          ${content
+            .replace(/### (.*)/g, '<h3 style="font-size: 1rem; text-transform: uppercase; letter-spacing: 0.05em; color: #555; margin-top: 1.5rem;">$1</h3>')
+            .replace(/## (.*)/g, '<h2 style="font-size: 1.2rem; margin-top: 2rem; color: #333;">$1</h2>')
+            .replace(/\n\n/g, "</p><p style='margin-bottom: 1rem;'>")
+            .replace(/\n/g, "<br>")}
+        </div>
+      `;
+
+      const filename = `${title.replace(/\s+/g, "_")}_${new Date().toISOString().slice(0, 10)}.pdf`;
+
+      await html2pdf()
+        .set({
+          margin: [10, 10, 10, 10],
+          filename,
+          image: { type: "jpeg", quality: 0.98 },
+          html2canvas: { scale: 2, useCORS: true },
+          jsPDF: { unit: "mm", format: "a4", orientation: "portrait" },
+        })
+        .from(container)
+        .save();
+    } catch (err) {
+      console.error("PDF export failed:", err);
+    } finally {
+      setIsExporting(false);
+    }
+  };
 
   return (
-    <div className="bg-surface-elevated border border-surface-overlay rounded-2xl overflow-hidden flex flex-col max-h-[550px] shadow-2xl group/report relative">
+    <div className="bg-surface-elevated border border-surface-overlay rounded-2xl overflow-hidden flex flex-col shadow-2xl group/report relative">
       <div className="absolute top-0 right-0 p-4 opacity-5 pointer-events-none group-hover:opacity-10 transition-opacity text-cta">
         <FileText className="w-24 h-24" />
       </div>
@@ -69,11 +114,12 @@ export function ReportPreview({ title, content, status, doctorName, doctorEmail,
       <div className="px-6 py-5 bg-surface-subtle border-t border-surface-overlay flex flex-col gap-4">
         <div className="flex items-center gap-4">
           <button 
-            disabled={!isComplete}
+            onClick={handleExportPDF}
+            disabled={!isComplete || isExporting}
             className="flex-1 flex items-center justify-center gap-2 px-4 py-3 bg-surface-elevated border border-surface-overlay hover:border-text-muted disabled:opacity-30 rounded-xl text-[11px] font-bold text-secondary transition-all"
           >
-            <Download className="w-4 h-4" />
-            Export PDF
+            {isExporting ? <Loader2 className="w-4 h-4 animate-spin" /> : <Download className="w-4 h-4" />}
+            {isExporting ? "Generating..." : "Export PDF"}
           </button>
           <button 
             onClick={onSend}