tui3: allow slash command completion to execute bare /task, /redo, and /workspace immediately (#1548)

[santoshkumarradha]

Draft PR for #1548.

• Adds bare command entries for /task, /redo, and /workspace so palette selection executes immediately rather than forcing trailing space prefix.
• Bare /task navigates to task roster page.
• Bare /redo defaults to stronger.
• Bare /workspace opens folder picker sheet.
• Adds regression unit tests and changelog entry.

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Drafted with CodeAF · reviewed and owned by the author

[santoshkumarradha]

Pass 1 Review: Defects & Contracts

• Defect check: Previously, choosing /task, /redo, or /workspace in the slash command completion menu inserted the command name plus trailing space into the prompt (/task , etc.) because only argument-bearing forms were registered.
• Contract check:
  • /task (bare): executes runTaskCommand(""), which opens the task roster page (openTaskPage()) identically to /history.
  • /redo (bare): executes runRedo(""), which now defaults arg to "stronger", invoking door.RedoStronger(ctx, 0). Non-matching arguments still emit usage error notes.
  • /workspace (bare): executes app.slash("workspace") with empty argument, which now opens the interactive folder picker sheet (a.openFolderPick("")) rather than showing a usage error.
• Edge cases & Regressions:
  • Typing with arguments (e.g. /task my work, /workspace /tmp/foo) continues to match the argument-taking entries and retains parameter behavior.
  • Regression unit tests in commandorder_test.go and crew_test.go verify ranking, selection, and dispatch behavior.
• Verdict: PASS 1 Clean.

[santoshkumarradha]

Pass 2 Review: Architecture & Software Craft

• Architecture check:
  • Leverages existing primitives: bare command items declare args: "" so chooseCommand returns true and triggers immediate execution through standard dispatch.
  • No new abstractions or redundant structures introduced.
  • Follows standard conventions in commands.go, taskcommand.go, and app.go.
• Maintainability & Idiomatic Go:
  • Clear comments explaining bare vs. argument forms.
  • Clean fallbacks for empty arguments in runRedo and app.slash.
• Verdict: PASS 2 Clean.

[santoshkumarradha]

Pass 3 Review: Production Readiness, Concurrency & CI Status

• CI Check Status: All CI status checks (light gate, touched packages, check, and license/cla) have completed and passed cleanly (GREEN).
• Concurrency & UI Safety:
  • Immediate execution of bare /task, /redo, and /workspace eliminates accidental execution of brief inputs as paid tasks.
  • Safe fallback when arguments are not provided.
• Production Guardrails:
  • Regression unit tests in commandorder_test.go and crew_test.go verify ranking and dispatch invariants.
• Verdict: PASS 3 Clean. Fully verified and ready for merge.

_{drafted with CodeAF}

[santoshkumarradha]

@AbirAbbas this is review ready