feat(frontend): port terminal presentation

[sandersonstabo]

Dependency

• Immediately follows feat(frontend): port host identity refresh controller #313 (agent/frontend-host-identity-controller-port-9148ee8).

Scope

• Port pure terminal output/session presentation to dependency-free Rust.
• Preserve bounded UTF-8-safe raw tails, whole-buffer ANSI/control stripping, carriage-return overwrite semantics, command and shell naming, live-state classification, and lifecycle replacement/append behavior.
• Register the frontend module and focused Bazel test target.

Exclusions

• No PTY/process custody, backend lifecycle execution, protocol wiring, or GPUI rendering.

Verification

• //modules/frontend:frontend focused jobs=1 build passed.
• //tests/frontend:terminal_presentation_test passed (12 Rust tests).
• Fresh strict Clippy passed for production and test sources.
• Root Rust format and locked/offline Cargo metadata passed.
• Exact seven-path/hash guards, clean diff/status, and Bazel shutdown passed.
• Receipt: D:/artisan-editor-gate-logs/frontend-terminal-presentation-20260829-gate2/receipt.json.

Remaining work

• Native terminal-card composition and protocol wiring remain dependency-aware follow-up work.

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Summary by cubic

Ports the pure terminal output and session presentation logic from TypeScript to dependency-free Rust, preserving the same behavior for raw tail, ANSI stripping, carriage returns, command naming, and lifecycle updates.

• Registers the new terminal_presentation module and a focused Bazel test target.
• Excludes PTY/process custody, backend lifecycle execution, and GPUI rendering.

^{Written for commit ada36b5. Summary will update on new commits.}