fix(asset-tagging): correct UTXO coins incorrectly tagged as Smart Chain

[CharlVS]

Fixes incorrect asset chain tagging for UTXO coins. Ensures proper classification to avoid Smart Chain mislabeling. No breaking API changes.

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Note

Prioritizes exact enum/ticker matching in CoinSubClass.parse and fixes smartChain/utxo identifiers to prevent UTXO mislabeling.

• Parsing improvements (coin_subclasses.dart):
  • Add exact enum-name and exact ticker matching (sanitized), with UTXO tie-breaker favoring utxo.
  • Introduce _enumNameLower helper and refine partial-match checks (sanitized ticker).
  • Narrow tryParse to catch StateError only; update docs to reflect precedence.
• Identifier corrections:
  • smartChain.ticker now returns SMART_CHAIN (was UTXO).
  • utxo.formatted now returns Native (was UTXO).

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[Copilot]

Pull Request Overview

This PR fixes asset chain tagging for UTXO coins that were being incorrectly classified as Smart Chain. The changes improve the matching logic by prioritizing exact matches and updates the display name for UTXO coins from "UTXO" to "Native".

Key Changes:

• Implements a three-tier matching strategy: exact enum name match, exact ticker match, then partial contains match
• Changes the UTXO display name from "UTXO" to "Native"

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[github-actions]

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[github-actions]

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[smk762]

Tagging for UTXO confirmed, with Smart Chain subset appropriately tagged.
A couple of potential issues tho:

• We also use NATIVE for parent coins like ATOM and ETH, though with colors matching their tokens. This should be ok, but makes the filter operate a little unintuatively, as ETH/ATOM wont come up if NATIVE is selected. Suggest keeping the coin type pill as they are (differing colors of native), but change the filter label to UTXO for a more logical deliniation.

• The white text on orange pill has suboptimal contrast in dark mode. The white on yellow for BNB/BEP20 is also hard to read in both ark and light mode. Suggest #ff9900 for UTXO native, and #ddbb00 for BNB/BEP20.

with updated colors: