fix(installer, scripts): improve read-only text handling and streamline db password input

- Update `screen.py` to make text read-only using `state='disabled'`, while allowing text selection and copying.
- Simplify `init_primary_domain.sh` by removing unnecessary local variable declaration for `db_pass`.

etc/init_primary_domain.sh

@@ -366,7 +366,7 @@ case "$ACTION" in
   initialize)
     ensure_tools
     # Read password from stdin if provided
-    local db_pass=""
+    db_pass=""
     if [[ ! -t 0 ]]; then
       read -r db_pass
     fi

installer/screen.py

@@ -195,8 +195,8 @@ class TerminalConsole(ttk.Frame):
         self.scroll.pack(side='right', fill='y')
         self.text.pack(side='left', fill='both', expand=True)
 
-        # Make read-only by default
-        self.text.bind("<Key>", lambda e: "break")
+        # Make read-only by default but allow selection and copying
+        self.text.configure(state='disabled')
 
     def write(self, content: str):
         """Append text to the console and scroll to the bottom."""