Scaffold new /[locale]/wallet/[address] route and sidebar nav entry

[christabel888]

Context: No /wallet/[address] route exists today -- new page, like #165.

Where:

• New frontend/src/app/[locale]/wallet/[address]/page.tsx
• frontend/src/components/layout/sidebar.tsx (coordinate with Restructure sidebar.tsx nav groups: Overview, Assets, Wallets, Soroban, Rankings, Validators, Explorer #175)

What to do:

• Scaffold the dynamic route; panels added in Add Portfolio Value panel to Wallet dashboard #171-Add Activity Calendar and Largest Transfers list to Wallet dashboard #174.
• Decide how a user gets here (search bar per De-emphasize search bar on homepage, move below stat tiles #145, or a "my wallet" flow if useWallet() from frontend/src/components/lib/wallet-context is connected).

Suggested approach:

1. This issue covers scaffolding /wallet/[address] plus all 5 panels (portfolio, balance history, allocation, activity calendar, largest transfers).
2. Decide the entry point: does the existing search (chore(deps): bump the rust-patch-updates group in /backend with 3 updates #4) route here when a valid Stellar address is entered? Does useWallet() (already in wallet-context) offer a "my wallet" shortcut if connected? Nail this down before building the panels, since it affects the page's default state (empty vs. pre-populated).

Watch out for:

• A wallet address is user-suppliable input in the URL -- validate it's a well-formed Stellar address before hitting any backend endpoint, and handle the "valid format, but no data" case (an address that's never transacted) distinctly from "invalid address."

Definition of done:

• /wallet/[address] route exists and is reachable

[benedict-cmd]

Hey I am a developer please assign me to this issue and I will deliver more than expected

[grantfox-oss]

🦊 GrantFox — @benedict-cmd has been assigned to this issue as part of the Official Campaign | FWC26 campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #170)
2. Your PR will be reviewed by the Stellar-Insightss maintainers

Good luck! Track your progress on GrantFox.