Improve network log readability and copying

[princepal9120]

Summary

• replace raw reqwest debug output in the network log pane with compact multiline request/response summaries
• keep a separate plain-text snapshot so the pane can expose a one-click Copy all action without losing the full raw text
• add focused tests for the new snapshot formatting behavior

Testing

• cargo test -p app network_logging --lib (not run: cargo is unavailable in this environment)

Fixes #9716

[oz-for-oss]

@princepal9120

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[princepal9120]

Closing as duplicate of #10062. Both PRs contain the same commit for #9716, so keeping one canonical PR open.

[oz-for-oss]

Overview

This PR replaces raw reqwest debug output in the network log pane with formatted request/response summaries, adds a Copy all header action backed by a raw plain-text snapshot, and updates model tests around snapshot joining/copy preservation.

Concerns

• This is a user-visible pane/header change, but the PR description does not include screenshots or video showing the new network log formatting and Copy all affordance end to end. For faster review, please upload screenshots or a video of the feature working end to end.
• The new request/response display formatting path has no direct test coverage; the added copy-preservation test only exercises NetworkLogItem::from_string.

Verdict

Found: 0 critical, 1 important, 1 suggestions

Request changes

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[oz-for-oss]

💡 [SUGGESTION] Add a test that constructs real request/response log items so the new display formatting stays covered while plain_text continues preserving raw debug output.