fix: dialog body padding via DialogPanel; restore unlock state on renderer reload

[pyramation]

Summary

Blocks' DialogContent provides no inner padding of its own — body content is expected to be wrapped in DialogPanel (which supplies px-6, scroll area, and header/footer-aware vertical padding). The New-item and otpauth-import dialogs used a plain <div>, so form fields ran edge-to-edge against the popup border.

 <DialogHeader>…</DialogHeader>
-<div className="flex flex-col gap-4">…</div>
+<DialogPanel className="flex flex-col gap-4">…</DialogPanel>
 <DialogFooter>…</DialogFooter>

This also gives the footer its intended border-t bg-muted/50 strip styling.

Also: App now queries dcrypt.vault.status() on mount, so a renderer reload while the main-process vault is unlocked no longer strands the user on the unlock screen.

After:

Link to Devin session: https://app.devin.ai/sessions/04636534e07048089ffb6b78142e12cd
Requested by: @pyramation

[devin-ai-integration]

🤖 Devin AI Engineer

I'll be helping with this pull request! Here's what you should know:

✅ I will automatically:

• Address comments on this PR. Add '(aside)' to your comment to have me ignore it.
• Look at CI failures and help fix them

Note: I can only respond to comments from users who have write access to this repository.

⚙️ Control Options:

• Disable automatic comment, CI, and merge conflict monitoring