feat(tui): continue or abort a paused operation without leaving

[narnaud]

An operation that pauses no longer ends the session: the tree gives way
to a paused view listing the working files, conflicts marked as in the
tree, with the file under the cursor diffed against HEAD. Space stages
a resolved file, c runs loom continue and a runs loom abort once a menu
confirms it. loom tui is exempt from the paused-state check and opens on
that view, for a git rebase or merge no loom state describes too.

Co-Authored-By: Claude Opus 5.5 (1M context) noreply@anthropic.com
Change-Id: Ibbaf6b02ac7c1058b63f761fe0c394fedd85e26c

Summary by CodeRabbit

• New Features
  • The TUI now opens during paused operations, including conflicts in Loom operations and Git rebases or merges, and displays changed files, diffs, progress, and resolution guidance.
  • Stage resolved files, continue or abort an operation, or reload after resolving conflicts outside the TUI. Aborting requires confirmation.
  • Continue and abort actions are added to the operation’s trace.
• Documentation
  • Updated TUI help to describe paused-operation controls and repository reloading.

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📥 Commits

Reviewing files that changed from the base of the PR and between 0e65059 and 62ee50e.

📒 Files selected for processing (5)

• docs/src/commands/tui.md
• specs/020-tui.md
• src/main.rs
• src/tui/app.rs
• src/tui/app_test.rs

No actionable comments were generated in the recent review. 🎉

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📒 Files selected for processing (3)

• src/main.rs
• src/tui/app.rs
• src/tui/app_test.rs

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📝 Walkthrough

Walkthrough

The TUI now opens a dedicated view for paused loom operations and Git rebases or merges. The view displays changed files and diffs. It provides controls to stage files, continue, abort, and reload.

Changes

Paused-operation TUI

Layer / File(s)	Summary
Detect and manage paused operations src/main.rs, src/tui/app.rs, src/tui/app_test.rs, specs/020-tui.md	The TUI can start during a paused operation and detects loom and Git operation state. Continue and confirmed abort actions append to the latest trace. Refresh displays the paused view if the operation remains active, or the status tree otherwise. Tests cover continuing and aborting a paused drop.
Inspect and resolve files in the paused view src/tui/app.rs, src/tui/app_test.rs, docs/src/commands/tui.md, specs/020-tui.md	The paused view supports file navigation, diff inspection, staging, and reload. It displays file status and operation guidance. Tests cover paused-view rendering, staging behavior, and refusal of ordinary tree actions. The documentation and specification describe the paused view and its controls.

Priority: ⬇️ Low

Estimated code review effort: 3 (Moderate) | ~25 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  actor User
  participant TUI
  participant LoomTransaction
  participant Git
  User->>TUI: Open TUI
  TUI->>LoomTransaction: Read transaction state
  TUI->>Git: Read rebase or merge state
  TUI-->>User: Show paused-operation view
  User->>TUI: Continue or confirm abort
  TUI->>LoomTransaction: Run continue or abort action
  TUI->>Git: Refresh operation state
  TUI-->>User: Show paused view or status tree

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Suggested reviewers: dfaure-kdab

Merge Risk: ⚪ Minimal · up to 0e650

The paused view keeps file selection in place after staging, and its continue and abort controls support Git-only operations. No issue identified here prevents merging.

Security Architecture Review

Security architecture risk: 🟡 Moderate · up to 45aa4

The changes remain confined to the local repository, but the new recovery workflow can stage more than the selected file and can act on an operation different from the one shown in an outdated confirmation. Existing transaction cleanup and action serialization limit ordinary failure cases.

Retained concerns

• Medium · security · inferred: The new selected-file staging action passes a repository-derived filename to Git as a pathspec rather than a literal path. A specially named changed file can therefore select additional files in the worktree, exceeding the resolution the user chose. Subsequent continuation can incorporate those staged changes. The helper already had this behavior, but direct paused-view staging is newly reachable. The argument separator prevents option injection, not pathspec interpretation; no automatic publication or access outside the worktree is established.
• Medium · reliability · inferred: The new abort confirmation names the operation cached in the paused view, but carries only confirmation text into execution. If another process finishes or replaces that operation, accepting the stale prompt can abort and roll back the currently loaded operation instead. This is a new consent-to-target mismatch in the persistent recovery view, not a newly introduced transaction rollback primitive. Same-session serialization does not cover external worktree mutations.

Security review details

Security Blast Radius

• inferred — The supported exposure is the current local worktree, index and transaction-owned rollback state under the invoking user's authority. Filename-based scope expansion requires a specially named changed file and user staging input. Stale abort requires an external operation change and user confirmation; no cross-tenant or service authority expansion is established.

Security Findings and Attack Paths

• inferred — A repository-controlled filename with Git pathspec magic can cross from selected-file presentation into broader index mutation. Continuation can consume the resulting index. This inferred attack path extends an existing helper weakness into the new paused-resolution workflow; unintended disclosure would additionally require sensitive matched content and later publication.

Trust Boundaries and Controls

• observed — Git commands use argument arrays and a worktree-scoped process, preserving the existing configuration policy and TUI credential-prompt suppression. Staging inserts an argument separator, while another helper explicitly literalizes filenames. The paused staging helper does not apply that literalization.

Resilience and Maintainability Implications

• inferred — Transaction cleanup remains centralized and retryable after ordinary failures. The remaining ownership gap is between the operation shown by the persistent view and the live operation selected when a destructive action executes.

Hardening Proposals

• proposed — Treat status-derived filenames as literal paths in paused staging, following the existing literal-path precedent, and validate that hostile filenames cannot mutate unrelated index entries.
• proposed — Bind destructive confirmation to an operation identity and revalidate it before mutation. If the operation changed, refresh and require fresh consent, while preserving supported manual-completion and recovery paths.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 61.70% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 47 functions across 3 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: allowing the TUI to continue or abort paused operations without exiting.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

• Autopilot · Keep fixing CodeRabbit findings and required CI, and resolving merge conflicts

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Actionable comments posted: 1

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @src/tui/app.rs:
- Around line 1826-1845: Update stage_paused_file to record the paused cursor
index before refresh. After refresh, advance only if the staged path is still
the current file; otherwise restore the cursor to the prior index clamped to the
refreshed file list. Keep the diff reset behavior unchanged.

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📥 Commits

Reviewing files that changed from the base of the PR and between d4fbc5b and 45aa424.

📒 Files selected for processing (5)

• docs/src/commands/tui.md
• specs/020-tui.md
• src/main.rs
• src/tui/app.rs
• src/tui/app_test.rs

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