Wire up tui input, transcript view, into full TUI app

[harryalbert]

Description

This PR replaces the old TUI prompt-stream/stdout path with the first production-shaped TUI transcript session. The ownership split is clear: RootTuiView only gates login, TuiTerminalSessionView owns the authenticated terminal surface + prompt path, and TuiTranscriptView adapts the canonical TerminalModel::BlockList into TUI viewport content.

The most important model invariant is that TUI terminal blocks and TUI agent blocks are still ordered by the shared TerminalModel::BlockList, not a TUI-only transcript list.

What to review

• crates/warp_tui/src/terminal_session_view.rs is the root renderer and handler for the transcript and input. It also handles sending prompts (was previously handled by the now deleted tui conversation model, but that model was just a thin wrapper around prompt submission and is now unnecessary)
• crates/warp_tui/src/transcript_view.rs is effectively the blocklist element, using the viewported list to render the blocklist. This view also owns history event handling, which I think is reasonable but curious on your take.
• crates/warp_tui/src/tui_block_list_viewport_source.rsis used by the transcript view to adapt the block list into viewport items, specifically terminal_blocks (crates/warp_tui/src/terminal_block.rs) and agent_blocks (crates/warp_tui/src/agent_block.rs)
  • terminal block rendering is pretty clear and can be skimmed IMO, but agent block rendering is worth a pass, specifically on how it does layout calculations for element heights (see the new content field)
• can skim over crates/warpui_core/src/elements/tui/container.rs — this PR adds per-axis padding but this is pretty schematic

Note: test-util flags were added in a bunch of places because warp_tui tests live in a separate crate, where warp’s #[cfg(test)] helpers are not compiled, so the feature explicitly exposes those test-only terminal helpers to downstream tests without making them part of normal builds. Apparently, cfg(test) is only enabled for the crate whose tests Cargo is currently compiling, not for that crate’s dependencies.

Testing

• I have manually tested my changes locally with ./script/run

Agent Mode

• Warp Agent Mode - This PR was created via Warp's AI Agent Mode

[harryalbert]

• Make BlocklistAiAinputModel surface agnostic #13333
• thinking blocks for TUI #13291
• Enable and render basic tool calling for the TUI #13283
• Wire up tui input, transcript view, into full TUI app #13104 👈 (View in Graphite)
• add generalized virtualized viewport element #13177
• Conversation streaming for the TUI #13057
• master

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