[UI - Wallet Stability] Analyse UI vulnerable components and potential model flows to be updated

[noeliaSD]

Description

• Identify complex and vulnerable wallet components that can affect to the stability
• Identify potential flows that can be upgraded with the new models structure
• Add QML unit testing to the identified components

Reference document:
https://www.notion.so/Wallet-vulnerable-components-during-the-offsite-65ed3f05ed2d4446ae9d0d025f2eccf7

[noeliaSD]

• Identified steps to follow in here: https://www.notion.so/Wallet-vulnerable-components-during-the-offsite-65ed3f05ed2d4446ae9d0d025f2eccf7?pvs=4#09e2c3bb22f9468c8352db91298c916e
• Already reviewed with wallet-core team.
• Next steps for me to create the needed tasks according to agreements.

[noeliaSD]

Here the tasks:

• [EPIC][UI - Wallet Stability] Main wallet layout improvements #14702
• [UI - Wallet Stability] Create single Amount input component and use it all over the app #14710
• [EPIC][UI - Wallet Stability] SendModal component improvements #14711
• [EPIC][UI - Wallet Stability] Wallet root store and shared store improvements #14712
• [EPIC][UI - Wallet Stability] Relevant wallet model flows improvements #14713
• [UI - Wallet Stability] Review flat_tokens_model/Source data method #14714