fix(amazonq): Fixing bugs for agentic chat

[laileni-aws]

Problem

• Pair programming features should be restricted to Q Chat but right now its available in other tabs like /test
• Multiple spinner loading events were causing delayed display of code difference views

Solution

• Improved performance by adding a specific check for 'cwc' tab type
• Optimized loading by eliminating redundant spinner events sent to the Mynah UI.

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[github-actions]

• This pull request modifies code in src/* but no tests were added/updated.
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