[Feature]: Link blockchain addresses, tx hashes, and blocks to explorers

[plind-junior]

Problem

Addresses, transaction hashes, and block numbers rendered across the dashboard are inert text — users can only copy them via CopyableAddress. There's no way to jump to the relevant blockchain explorer (blockchain.com for BTC, taostats.io for TAO) without manually assembling the URL.

The existing CopyableAddress also conflates two intents on a single click: "copy" and "open" can't both live there cleanly.

Proposed change

Split CopyableAddress into two adjacent affordances:

• The address/hash/block label becomes a link to the correct explorer when chain + type props identify it.
• A dedicated copy button (ContentCopyIcon → CheckIcon on success) handles clipboard separately.

Add a getExplorerUrl(chain, type, value) helper that routes:

chain	type	target
BTC	address	blockchain.com/btc/address/<value>
BTC	tx	blockchain.com/btc/tx/<value>
TAO	address	taostats.io/account/<value>
TAO	block	taostats.io/block/<value>

SS58 48-char hotkeys are auto-detected as TAO addresses when the caller doesn't specify.

Out of scope

• Explorer choice configuration (hardcoded blockchain.com / taostats.io).
• EVM or other chain support.
• In-app mini-explorer / modal preview.

[wmagev]

Interesting! That's what I expected. Will make the PR shortly