fix(tui): route warning logs to status bar instead of stderr

[r3v5]

Summary

• Replace all 25 tracing::warn!/info!/debug!() calls in openshell-tui with app.status_text assignments to prevent stderr writes from corrupting ratatui's alternate-screen layout
• Add ForwardWarnings event variant to decouple port-forward warning delivery from sandbox name in CreateResult, preventing downstream gRPC lookup failures in handle_exec_command
• Remove tracing dependency from the TUI crate as a compile-time guard against reintroduction (14 other crates retain it)

Related Issue

Closes #2120

Changes

crates/openshell-tui/src/lib.rs

• 18 direct-access tracing::*!() calls → app.status_text assignments
• 7 spawned-task calls in start_port_forwards() → Vec<String> accumulation returned to caller
• 2 tracing::debug!() calls in refresh_draft_chunks() silently dropped (not user-actionable)
• start_port_forwards() return type changed from () to Vec<String>
• Forward warnings sent via Event::ForwardWarnings, not embedded in sandbox name

crates/openshell-tui/src/event.rs

• Added ForwardWarnings(Vec<String>) variant to Event enum

crates/openshell-tui/Cargo.toml

• Removed tracing = { workspace = true }

Before / After

Before (stderr spam corrupting TUI layout)

After — error-state sandbox with gateway down (errors in title bar, clean layout)

After — reproduced issue #2120 scenario (error-phase sandbox, gateway stopped mid-session)

Manual Verification

Prerequisites

• A running OpenShell gateway (brew services start openshell or equivalent)
• At least one error-phase sandbox (openshell sandbox create --name test-error will create one that enters Error phase)

Test 1: Error-state sandbox (issue #2120 repro)

openshell term
# Navigate to the error-phase sandbox, press Enter
# Wait 10+ seconds (5 ticks)
# Expected: clean TUI layout, no stderr spam
# Expected: title bar may show error text in parentheses if gRPC calls fail

Test 2: Gateway down mid-session

# Tab 1:
openshell term
# Navigate to any sandbox

# Tab 2:
brew services stop openshell

# Tab 1 (wait 4-6 seconds):
# Expected: title bar shows "(failed to refresh sandbox policy: tcp connect error)" or similar
# Expected: TUI layout remains intact, no stderr corruption
# Expected: errors cycle in title bar each tick (policy, sandboxes, providers)

# Cleanup:
brew services start openshell

Test 3: Compile-time guard

grep -rn 'tracing::' crates/openshell-tui/src/
# Expected: zero results (exit code 1)

cargo clippy -p openshell-tui
# Expected: no warnings

Testing

• cargo build -p openshell-tui — compiles clean
• cargo clippy -p openshell-tui — no warnings
• grep -rn 'tracing::' crates/openshell-tui/src/ — zero results
• mise run pre-commit — passes
• Manual: openshell term → error sandbox → clean layout, no stderr corruption
• Manual: gateway stopped mid-session → errors display in title bar, TUI intact
• Reproduced exact scenario from issue [term] Warning Log Messed Up the TUI #2120 (error-phase sandbox detail view)

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[r3v5]

I have read the DCO document and I hereby sign the DCO.

[r3v5]

recheck

[TaylorMutch]

/ok to test 97862a8

[TaylorMutch]

Looks good to me!