Harden the renderer CSP (sec #2)

The policy fell back to default-src for scripts and allowed
'unsafe-inline', so any future injection sink would run with the
renderer's full contextBridge authority. The page has no inline scripts
(one external module), so split the directives: script-src 'self' with
no inline, style-src keeps 'unsafe-inline' for React inline styles, and
add object-src/base-uri/frame-src 'none'. localhost stays only on
script/connect for the dev server. Verified the production build still
loads and renders end to end.

AgentCompany-New/src/renderer/index.html

@@ -4,7 +4,7 @@
     <meta charset="UTF-8" />
     <meta
       http-equiv="Content-Security-Policy"
-      content="default-src 'self' 'unsafe-inline' http://localhost:* ws://localhost:* data:; img-src 'self' data:; font-src 'self' data:;"
+      content="default-src 'self'; script-src 'self' http://localhost:*; style-src 'self' 'unsafe-inline'; img-src 'self' data:; font-src 'self' data:; connect-src 'self' http://localhost:* ws://localhost:*; object-src 'none'; base-uri 'none'; frame-src 'none';"
     />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>AgentCompany</title>