Paste batches, /ps and clipboard staging: review pasted commands and queue them together #354

Goal

Make large pasted command sequences easier to inspect and prepare without unsafe execution or a background clipboard recorder. Reuse the existing paste guard, /ps, composer, queue (#357) and copy picker (#358).

Behavior

• A large or multiline paste becomes a reviewable staging item when appropriate. Syntax-aware handling should identify independent commands only where valid for the active shell (zsh, Bash, Fish). Heredocs, loops, continuation lines, multiline strings and ambiguities remain intact; never split solely at newlines.
• Actions: Insert as text, Edit, Queue reviewed commands, Remove, Cancel. Clear count/order and individual command previews. Nothing executes just because it was pasted, staged or queued; explicit user confirmation is required to queue a reviewed batch.
• /ps explicitly reads the current clipboard and brings it to paste review; /cp alias is part of Copy: selections, picker, sticky Copy; Smart Folding folds long output #358, not part of this issue.
• Clipboard staging is ephemeral by default; allow deliberate user-created clips/command candidates from current composer, selected history, or safe output-derived staging. No implicit persistence across restarts, no ambient clipboard history.
• Optional clipboard-change suggestions only when a reliable platform mechanism reports changed state without reading clipboard contents, and only with NMSh owning an empty composer and no foreground input. Keep proactive suggestions configurable and unobtrusive; omit/disable when support is uncertain. Explicitly inserting opens/reads clipboard content through the sanctioned provider.
• A foreground CLI owns its input (including no-echo/password, one-key and Fish read states). Paste UI never steals, logs or replays that input.
• Preserve raw paste bytes for review (including newlines) until the user explicitly edits; no silent re-quoting, interpolation, trimming or execution.

Defaults

No automatic execution. No persistent or always-on clipboard history. No unsolicited clipboard-content inspection, network/agent transmission or panel interruption. If syntax classification is uncertain, offer a single text block.

Acceptance

• zsh/Bash/Fish shell grammar fixtures: chains, heredocs, multiline literals, escaping, comments and invalid syntax.
• Safe stage/edit/reorder/review/queue behavior with no duplicates or automatic submit.
• Clipboard missing/access denied/privacy cases, focus changes and active-program input ownership.
• Real-PTY test across narrow/NO_COLOR/Safe, detach/reattach and queue failure.
• Unobtrusive discoverable UI with existing provider fallbacks; accurate behavior when clipboard-change detection unsupported.

Parent: #359. Queue foundation: #357; copy: #358; input-awareness: #348.