Pins and recipes; queue conditions (manual approval step) #355

Goal

Allow users to reuse explicit, reviewed commands and sequences, extending NMSh history, command blocks and the same-shell queue (#357) without introducing an independent workflow engine.

Pins

• From a completed command block or history selection, Pin command with optional human-written name/description and original cwd/project context.
• Distinguish session-only, project-specific and global scope only when useful. No automatic pinning, secret parameter extraction, or passive persistence of command output.
• A pin inserts/stages the original command for editing; never auto-runs it.

Recipes

• Users explicitly convert selected ordered command blocks or queue entries into a named, reviewable/editable recipe.
• Support explicit validated placeholders for path/device/other arguments; don't silently reuse environment credentials, unsafe shell interpolation or detected secrets.
• Display expanded commands and cwd/environment expectations before any run. Recipes are never triggered by opening a directory, restoring a session or observing clipboard content.
• Do not silently rewrite shell syntax or “fix” commands.

Queue conditions

• Preserve sequential persistent shell execution and once-only submission.
• Default: stop/pause queue on failure or interruption.
• Optional per-entry condition: after previous success, regardless of previous result, or require manual approval. Expose only when it adds value; a simple queue remains simple.
• Manual approval acts on the exact queued command, with explicit identity and lifetime. No program-driven or output-text-driven auto-approval; no intent inference for destructive commands.
• Work out how saved recipes share the queue model. Pueue (if later integrated under Workflow integrations: external editors, search, preview tools and shell utilities #366) handles separate/detached jobs and must not replace same-shell commands.
• Store pins/recipes only on explicit save; minimize scope and explain where data lives. Edited/deleted recipes must not silently change already-running queue entries.

Acceptance

• Clear keyboard-first Pins/Recipes entry points using existing Actions/History/Queue menus; no large permanent panel by default.
• Correct multi-session/project scope, atomic save/delete and migration.
• Placeholder quoting/validation, redaction/secret handling, explicit review and no automatic execution.
• Queue dependency/failure/interrupt/manual approval semantics tested through real zsh/Bash/Fish PTYs, including detach/reattach.
• Narrow/NO_COLOR/Safe/restore coverage; maintain UX documentation and ledger.

Parent: #359; dependencies #357, #358; related staging #354.