chore: apply cargo fmt across the workspace

[BunsDev]

Summary

cargo fmt --check --all surfaced 85 rustfmt deviations across 31 .rs files. Applied via cargo fmt --all.

Net +562 / −496 lines, all formatting. No semantic changes.

Where the diff lives

• crates/create_markdown_core/src/parsers/ — re-wraps of long match arms (inline.rs, markdown.rs, tokenizer.rs) plus serializers/markdown.rs
• crates/warpui_core/src/elements/ — minor brace placement in event_handler.rs, hoverable.rs, text.rs
• app/src/ — collapse of multi-line method chains that fit, split of others past the line-width limit (bin/oss.rs, ai_assistant/panel.rs, etc.)
• A handful in crates/ai/, crates/warp_completer/, crates/cast_agent/

Test plan

• cargo check --workspace --all-targets — clean, 0 errors
• cargo fmt --check --all would now exit 0 against this branch
• CI green on this PR

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Applies cargo fmt --all across the Rust workspace to resolve rustfmt deviations and normalize formatting (match guards, method chaining, import ordering, and line wrapping) throughout core crates and the app UI code.

Changes:

• Workspace-wide rustfmt reformatting across parsing/serialization, UI elements, and app views.
• Rewrapped long expressions/match guards and normalized import/group ordering.
• Reformatted and reorganized several test blocks and helper functions for consistent style.

Reviewed changes

Copilot reviewed 31 out of 31 changed files in this pull request and generated 3 comments.

Show a summary per file

File	Description
crates/warpui_core/src/elements/text.rs	rustfmt rewrap of match arm + guard formatting.
crates/warpui_core/src/elements/hoverable.rs	rustfmt rewrap of event match guards/arms.
crates/warpui_core/src/elements/event_handler.rs	rustfmt rewrap of guarded match arms and long call formatting.
crates/warp_completer/src/completer/engine/argument/legacy.rs	rustfmt rewrap of match arm + guard with iterator chain.
crates/create_markdown_core/src/utils.rs	rustfmt line wrapping and brace/guard formatting.
crates/create_markdown_core/src/serializers/markdown.rs	rustfmt rewraps; test formatting adjustments.
crates/create_markdown_core/src/parsers/tokenizer.rs	rustfmt wrapping of long expressions/guards and conditionals.
crates/create_markdown_core/src/parsers/markdown.rs	rustfmt import ordering and test formatting.
crates/create_markdown_core/src/parsers/inline.rs	rustfmt wrapping of chained if let guards and returns.
crates/create_markdown_core/src/lib.rs	rustfmt reorder/rewrap of pub use exports.
crates/create_markdown_core/src/document.rs	rustfmt wrapping and conditional formatting; test section formatting.
crates/create_markdown_core/src/blocks.rs	rustfmt wrapping for signatures/iterators and test assertions.
crates/cast_agent/tests/substrate.rs	rustfmt method-chain wrapping in tests.
crates/cast_agent/src/runtime.rs	rustfmt rewrap of OnceLock init closure and call chains.
crates/cast_agent/src/gateway.rs	rustfmt line wrapping for URL formatting and type alias.
app/src/workspace/view.rs	rustfmt indentation/chain wrapping in workspace view logic.
app/src/workspace/mod.rs	rustfmt reorder of use items with cfg gating.
app/src/terminal/cli_agent_sessions/listener/mod.rs	rustfmt import and method-chain wrapping.
app/src/code/cast_agent_diagnostics.rs	rustfmt wrapping of match/iterator chains and method calls.
app/src/cli_chat/view/transcript.rs	rustfmt wrapping of match alternatives for bindings.
app/src/cli_chat/view/model_picker.rs	rustfmt chain wrapping and match alternative formatting.
app/src/cli_chat/view/mod.rs	rustfmt wrapping of subscribe_to_model and placeholder setter.
app/src/cli_chat/view/message_bubble.rs	rustfmt wrapping of helper signatures and calls.
app/src/cli_chat/view/error_banner.rs	rustfmt chain wrapping.
app/src/cli_chat/view/empty_state.rs	rustfmt tuple formatting in match arms.
app/src/cli_chat/strings.rs	rustfmt line wrapping for long string constant.
app/src/cli_chat/store_tests.rs	rustfmt enum struct literal formatting.
app/src/cli_chat/store_schema_tests.rs	rustfmt closure formatting in query call.
app/src/cli_chat/model.rs	rustfmt function signature wrapping.
app/src/bin/oss.rs	rustfmt method-chain wrapping.
app/src/ai_assistant/panel.rs	rustfmt chain wrapping and closure formatting.

Comments suppressed due to low confidence (1)

crates/create_markdown_core/src/serializers/markdown.rs:621

• These #[test] functions are outside the #[cfg(test)] mod tests block, so they will be compiled into non-test builds as regular private functions (and may trigger dead_code warnings / increase build time). Move them into the existing tests module or add #[cfg(test)] to each test.

#[test]
fn code_block_with_backtick_fence_is_escaped() {
    use crate::blocks::code_block as mkcode;
    let block = mkcode("```js\nconsole.log(1)\n```", Some("md".to_string()));
    let siblings = [block.clone()];

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