Update navigation, isolates table, and homepage content

[Ulthran]

Summary

• rename the navbar brand to "microbialARC" and place the Aliquots tab after the Assembly menu
• update the isolates table headers to show collection information and a derived collection year
• refresh the homepage narrative and include the new CHOP banner imagery

Testing

• black .
• pytest tests/

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https://chatgpt.com/codex/tasks/task_e_68f93198c3948323a3bfbcfc620a041f

[Copilot]

Pull Request Overview

This PR updates the application branding, restructures navigation, and enhances the isolates browse interface. The changes improve user experience by providing clearer information about the microbial archive collection and reorganizing navigation for better workflow alignment.

Key changes:

• Rebranded the application as "microbialARC" with expanded homepage narrative and CHOP banner imagery
• Reorganized navigation to place Aliquots after Assembly menu items
• Modified isolates table to display collection name and derived collection year instead of raw dates

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 3 comments.

File	Description
app/templates/index.html	Updated homepage with new branding, expanded mission description, added CHOP banner images, and reformatted collection list
app/templates/browse_isolates.html	Replaced date columns with collection name and year, added JavaScript function to extract year from dates
app/templates/base.html	Changed navbar brand from "mARC Query" to "microbialARC" and moved Aliquots menu item after Assembly dropdown

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