feat(frontend): replace iframe with PDF.js viewer (#39)

- Install pdfjs-dist v5 and add optimizeDeps pre-bundle config - New PdfViewer.svelte component: renders each page on a <canvas> with correct device-pixel-ratio scaling, overlays a text layer (enables text selection; foundation for annotations in #40), prev/next navigation, zoom controls, and lazy page rendering (only current ±1 pre-fetched — avoids freezing on multi-page documents) - Replace the <iframe> in documents/[id]/+page.svelte with PdfViewer; image attachments continue to use <img>; detection now uses doc.contentType instead of filename extension - Unit tests for navigation controls and page counter (pdfjs mocked) - E2E tests: PDF renders as canvas (not iframe), nav controls visible, image fallback stays as <img>; minimal.pdf fixture for upload tests Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-03-23 19:10:02 +01:00
parent 4f69457a68
commit 5fb6a1eec0
9 changed files with 756 additions and 9 deletions
--- a/frontend/package-lock.json
+++ b/frontend/package-lock.json
@@ -9,7 +9,8 @@
 			"version": "0.0.1",
 			"dependencies": {
 				"diff": "^8.0.3",
-				"openapi-fetch": "^0.13.5"
+				"openapi-fetch": "^0.13.5",
+				"pdfjs-dist": "^5.5.207"
 			},
 			"devDependencies": {
 				"@eslint/compat": "^1.4.0",
@@ -885,6 +886,256 @@
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+			"funding": {
+				"type": "github",
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+		"node_modules/@napi-rs/canvas-win32-x64-msvc": {
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+			"cpu": [
+				"x64"
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+			"license": "MIT",
+			"optional": true,
+			"os": [
+				"win32"
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+				"type": "github",
+				"url": "https://github.com/sponsors/Brooooooklyn"
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 		"node_modules/@playwright/test": {
 			"version": "1.58.2",
 			"resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.58.2.tgz",
@@ -3954,6 +4205,13 @@
 			"dev": true,
 			"license": "MIT"
 		},
+		"node_modules/node-readable-to-web-readable-stream": {
+			"version": "0.4.2",
+			"resolved": "https://registry.npmjs.org/node-readable-to-web-readable-stream/-/node-readable-to-web-readable-stream-0.4.2.tgz",
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 		"node_modules/obug": {
 			"version": "2.1.1",
 			"resolved": "https://registry.npmjs.org/obug/-/obug-2.1.1.tgz",
@@ -4129,6 +4387,19 @@
 			"dev": true,
 			"license": "MIT"
 		},
+		"node_modules/pdfjs-dist": {
+			"version": "5.5.207",
+			"resolved": "https://registry.npmjs.org/pdfjs-dist/-/pdfjs-dist-5.5.207.tgz",
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+			"license": "Apache-2.0",
+			"engines": {
+				"node": ">=20.19.0 || >=22.13.0 || >=24"
+			},
+			"optionalDependencies": {
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 		"node_modules/picocolors": {
 			"version": "1.1.1",
 			"resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",