fix(accordion): remove last item divider, update pressed state background color, and add header padding for ionic theme

[OS-susmitabhowmik]

Issue number: resolves internal

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What is the current behavior?

There were several issues in the ionic theme which are resolved in this PR:

• The last item of an accordion had a divider
• The pressed state color did not match design specifications
• Nested accordions did not have not have horizontal padding, causing the focus state to be different from the parent accordion

What is the new behavior?

The following changes were made in the ionic theme:

• Removed the divider from the final accordion item
• Update the pressed state color to match design specifications
• Add additional horizontal padding for nested accordion items

Does this introduce a breaking change?

• Yes
• No

Other information

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Project	Deployment	Actions	Updated (UTC)
ionic-framework	Ready	Preview, Comment	Mar 20, 2026 0:00am