Harden provider security and build dependencies

AgentCompany-New/src/renderer/src/app/Onboarding.tsx

@@ -254,7 +254,7 @@ function CompanyStep({ draft, onChange, onBack, onNext }: StepProps) {
       </Field>
       <Field label="Workspace path (optional)">
         <div className="row" style={{ gap: 6 }}>
-          <input className="input" value={draft.workspacePath} onChange={(event) => onChange({ workspacePath: event.target.value })} placeholder="Choose a folder for agent artifacts" />
+          <input className="input" value={draft.workspacePath} onChange={(event) => onChange({ workspacePath: event.target.value })} />
           <Button tone="ghost" onClick={chooseWorkspace}><Icon name="folder" size={13} /> Choose</Button>
         </div>
       </Field>

AgentCompany-New/src/renderer/src/app/OnboardingProviderStep.tsx

@@ -127,7 +127,6 @@ function ProviderCredentialFields({
             <input
               className="input"
               value={draft.providerBaseUrl}
-              placeholder={selected.customEndpoint === "openai" ? "https://host/v1" : "https://host"}
               onChange={(event) => onChange({ providerBaseUrl: event.target.value })}
             />
           </Field>
@@ -174,7 +173,6 @@ function ProviderCredentialFields({
             <input
               className="input"
               value={draft.providerModel}
-              placeholder={modelPlaceholder(live, isOAuthLike, loading)}
               onChange={(event) => onChange({ providerModel: event.target.value })}
             />
           )}
@@ -193,12 +191,6 @@ function Actions({ onBack, onNext }: { onBack: () => void; onNext: () => void })
   );
 }
 
-function modelPlaceholder(live: boolean, isOAuthLike: boolean, loading: boolean): string {
-  if (!live) return "Enter the model id";
-  if (loading || isOAuthLike) return "Loading...";
-  return "Click Get models, or type a model id";
-}
-
 function authBadge(authType: string): string {
   if (authType === "api_key") return "API key";
   if (authType === "oauth_pkce") return "OAuth";

AgentCompany-New/src/renderer/src/pages/chat/ChatConversation.tsx

@@ -150,7 +150,6 @@ function ConversationHeader({
             className="input"
             autoFocus
             aria-label="Search messages"
-            placeholder="Search messages"
             value={query}
             onChange={(event) => onQueryChange(event.target.value)}
             onKeyDown={(event) => { if (event.key === "Escape") toggleSearch(); }}

AgentCompany-New/src/renderer/src/pages/settings/ProviderConnectionDialog.tsx

@@ -83,7 +83,6 @@ function CompatFieldsForm({ entry, provider }: { entry: ProviderCatalogEntry; pr
           className="input"
           name="cloudBaseUrl"
           value={baseUrl}
-          placeholder={entry.customEndpoint === "openai" ? "https://host/v1" : "https://host"}
           onChange={(event) => setBaseUrl(event.target.value)}
         />
       </Field>