fix: add --clear to uv venv in update_script() to prevent interactive prompt

uv venv asks interactively when .venv already exists:
  ? A virtual environment already exists at .venv. Do you want to replace it? [y/n]

This hangs update scripts. Using --clear avoids the prompt.
Not needed in install scripts since .venv does not exist there yet.

Affected: calibre-web, homelable, profilarr, yamtrack

ct/calibre-web.sh

@@ -44,7 +44,7 @@ function update_script() {
 
     msg_info "Installing Dependencies"
     cd /opt/calibre-web
-    $STD uv venv
+    $STD uv venv --clear /opt/calibre-web/.venv
     $STD uv pip install --python /opt/calibre-web/.venv/bin/python --no-cache-dir --upgrade pip setuptools wheel
     $STD uv pip install --python /opt/calibre-web/.venv/bin/python --no-cache-dir -r requirements.txt
     msg_ok "Installed Dependencies"

ct/homelable.sh

@@ -43,7 +43,7 @@ function update_script() {
 
     msg_info "Updating Python Dependencies"
     cd /opt/homelable/backend
-    $STD uv venv /opt/homelable/backend/.venv
+    $STD uv venv --clear /opt/homelable/backend/.venv
     $STD uv pip install --python /opt/homelable/backend/.venv/bin/python -r requirements.txt
     msg_ok "Updated Python Dependencies"
 

ct/profilarr.sh

@@ -44,7 +44,7 @@ function update_script() {
 
     msg_info "Installing Python Dependencies"
     cd /opt/profilarr/backend
-    $STD uv venv /opt/profilarr/backend/.venv
+    $STD uv venv --clear /opt/profilarr/backend/.venv
     sed 's/==/>=/g' requirements.txt >requirements-relaxed.txt
     $STD uv pip install --python /opt/profilarr/backend/.venv/bin/python -r requirements-relaxed.txt
     rm -f requirements-relaxed.txt

ct/yamtrack.sh

@@ -43,7 +43,7 @@ function update_script() {
 
     msg_info "Installing Python Dependencies"
     cd /opt/yamtrack
-    $STD uv venv .venv
+    $STD uv venv --clear .venv
     $STD uv pip install --no-cache-dir -r requirements.txt
     msg_ok "Installed Python Dependencies"