add pypdf dependency for PDF upload support

CLAUDE.md

@@ -19,7 +19,7 @@ sudo systemctl restart jarvischat
 
 ```bash
 ./venv/bin/pip install -r requirements.txt
-# Also requires: psutil jinja2 python-multipart (not in requirements.txt)
+# Also requires: psutil jinja2 python-multipart pypdf (not in requirements.txt)
 ```
 
 ## Architecture

README.md

@@ -84,7 +84,7 @@ cd /opt/jarvischat
 python3 -m venv venv
 
 # Install dependencies
-./venv/bin/pip install fastapi uvicorn httpx psutil jinja2 python-multipart
+./venv/bin/pip install fastapi uvicorn httpx psutil jinja2 python-multipart pypdf
 
 # Set admin PIN before first startup (4 digits)
 export JARVISCHAT_ADMIN_PIN=4827

requirements.txt

@@ -1,3 +1,4 @@
 fastapi>=0.115.0
 uvicorn[standard]>=0.32.0
 httpx>=0.27.0
+pypdf>=5.0.0