Copy lineups to the next or previous page

[SunkenInTime]

Lineups could not be copied to another page at all, while agents, abilities, text and utilities have "Copy to next page" and "Copy to previous page". strich asked on Discord on Oct 6 to copy a lineup to another page. This gives lineups the same two menu items as everything else, on local and cloud strategies, desktop and web.

What changes

• Lineup right-click menus get "Copy to previous page" and "Copy to next page". Both the landing spot's menu and the throw spot's menu have them. They use the same builder as the other items, so the words, icons, place in the menu (last) and toasts are identical.
• What is copied: every lineup at the spot you right-clicked, with the spots they aim at. On the other page they sit in the same spot, with their names, notes, video links and screenshots.
• A page that already has the lineup, or a copy of it, gets no other, as for placed items. Locally the menu item disappears. On cloud, only the page on screen is loaded, so the copy reads the other page first and says "The next page already has it."
• Copied lineups get ids that carry the original's. This is Copy to next or previous page on cloud strategies #267's copy-id format, <original id>~cp1~<uuid>, used on local and cloud. A cloud lineup group needs an id no other group in the strategy has, and one rule for both keeps a copied lineup the same wherever it lives. A later PR can use the shared root to make lineups glide between pages, as Copy to next or previous page on cloud strategies #267 does for placed items.

The first version of this PR had "Move to page" and "Copy to page" listing every page, from card 3 of the #265 lineup mock. You chose to make lineups match the other items instead, so that is gone.

How it works

• LineUpGraph.copyOfLinks renames each copied lineup, throw spot and landing with newPageCopyId. Shared spots stay shared, and each marker's lineUpID follows its spot.
• Screenshots are shared, not duplicated. A copy keeps its image ids. Nothing deletes an image while anything in the strategy still shows it. Locally, deleteUnusedImages checks every page. On the server, assetReferences holds one row per lineup group.
• Local (copyDirectionsForLineUps, copyLineUpsToAdjacentPage): a neighbour whose lineups share a root with one being copied is left out of the menu. The copy is one Hive write. Hive can store a write and then throw while compacting its file, so after a throw the box decides whether the copy is there.
• Cloud: like Copy to next or previous page on cloud strategies #267's copy, it reads the other page from the server and lays this device's queued lineup work over it. It refuses on a shared root, and otherwise queues one new lineup group after that page's own with enqueueOffCanvas. Copies run one at a time with Copy to next or previous page on cloud strategies #267's.
  • The lineups at one spot share it, so they always make one group. A copy that would need more than one is refused before anything is queued, so it lands whole or not at all.
  • Without enqueueOffCanvas, a copy that landed while its page was on screen got deleted. A test reproduces that.
• No Convex change.

Calls you might want to undo

• A throw spot shared by two lineups loses "Copy to next page" once one of them is on that page. Copying from the spot would copy both, and one is already there. The other lineup can still be copied from its own landing.
• On a cloud strategy, copying needs the network. If the other page can't be read, nothing is copied and a toast says so. This matches Copy to next or previous page on cloud strategies #267.
• Lineups don't glide between pages yet. The copy ids make that possible later.
• Two teammates copying the same lineup at the same moment can both land a copy, as with Copy to next or previous page on cloud strategies #267's placed items. Nothing is lost; the page shows it twice. Preventing it needs a check on the server.

Ground truth

Cloud, in the web build in Edge, served over Tailscale against the dev deployment and signed in as a test account, with real browser mouse events. On a strategy with lineups on page 1:

• Both menus end in "Copy to next page", as above.
• Copying "B shock" to the next page went through with no toast, as for placed items.
• Copying it again said "The next page already has it." Page 2 then showed "B shock" in the same spot.

Local, in the Windows release build with a signed-out store, driven by synthetic pointer events from a scratch driver I didn't commit:

• I copied "A main smoke" from its landing to the next page.
• The landing's menu then no longer offered "Copy to next page", and neither did its throw spot, which "A long bolt" shares.
• Page 2's saved lineups had "A main smoke" with ids k1~cp1~…, oA~cp1~… and lA~cp1~…, at the original's positions.

Tests:

• strategy_page_semantics_test:
  • a local copy of the lineups at a spot, with roots, shared spots, names, notes, screenshots and positions;
  • a neighbour that already has them is not offered and gets no other, while another lineup still can go;
  • a throw spot whose other lineup is already there doesn't offer it, and that lineup still can go from its landing;
  • a copy onto a page that already has other lineups.
• strategy_page_session_provider_test:
  • a cloud copy is one group after the page's own, with root-carrying ids;
  • a page with a copy already gets no other;
  • two copies at once send one;
  • an unreadable page, and a copy this device can't store;
  • lineups that share no spot are refused before anything is queued;
  • a lineup whose copy couldn't be stored to send is not offered (fails without the fix);
  • the lineups are copied as they were when the user asked;
  • a real-queue test where the copy lands while its page is on screen, which fails without enqueueOffCanvas.
• Full suite on 38869ce: 1825 passed, 9 skipped. The last commit adds two tests; the affected test files pass on it.

Astra reviewed the first version three times. Most findings were about Move, which this version drops: a teammate's edit lost during a move, local write errors, and Hive throwing after storing. The Hive fix stays. CodeRabbit found that a copy needing two cloud groups could land half-way; it is now refused up front.

Astra then reviewed this version and found no blockers. One fix followed: a lineup imported with a very long id was offered "Copy to next page" on cloud and did nothing when chosen, because its copy couldn't be stored to send. It is now left out of the menu. Astra also asked me to pin the shared-throw-spot rule with a test.

Stacking

This PR targets #267's branch and also contains #265's commits, because it uses #265's lineup menus and #267's copy ids and enqueueOffCanvas. Until #265 merges, its commits show in this diff too. Merge #265 and #267 first.

ci: analyze test web

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Walkthrough

The change adds draft-based editing for lineup placements and controls to save or cancel edits. It also adds local and cloud copy or move actions for sending selected lineups to other strategy pages.

Changes

Lineup placement editing

Layer / File(s)	Summary
Draft state and edit lifecycle lib/const/line_provider.dart, lib/providers/interaction_state_provider.dart, lib/providers/editor_operation_provider.dart, lib/providers/collab/lineup_editing_presence_provider.dart, test/per_object_undo_test.dart	The lineup provider tracks draft endpoint positions and saves changed endpoints in one transaction. Interaction and editor providers track active edits, and tests cover save, undo, redo, and cancellation.
Canvas editor and drag handling lib/interactive_map.dart, lib/widgets/line_up_placement_editor.dart, lib/widgets/line_up_widget.dart, lib/widgets/line_up_line_painter.dart, lib/widgets/line_up_placer.dart, lib/widgets/draggable_widgets/placed_widget_builder.dart, test/lineup_add_item_interaction_test.dart	A canvas overlay renders edited endpoints and draft connectors. Drag updates change draft positions; out-of-bounds drops restore the starting position.
Edit entry and save controls lib/widgets/dialogs/create_lineup_dialog.dart, lib/widgets/lineup_control_buttons.dart	The dialog adds an Edit placement action. The editing controls provide Save and return to navigation after saving.

Lineup page transfer

Layer / File(s)	Summary
Transfer data and target selection lib/const/line_provider.dart, lib/providers/strategy_provider.dart, test/strategy_page_semantics_test.dart	Selected links can be copied with their referenced endpoints and fresh IDs. The strategy provider lists eligible destination pages and their offsets.
Local and cloud transfer execution lib/const/line_provider.dart, lib/providers/strategy_provider.dart, test/strategy_page_semantics_test.dart, test/strategy_page_session_provider_test.dart	The provider adds copied lineups locally or queues cloud additions. A move deletes source links only after a successful copy and source-data checks.
Transfer menu actions lib/widgets/draggable_widgets/lineup_page_menu.dart, lib/widgets/draggable_widgets/agents/agent_widget.dart, lib/widgets/draggable_widgets/ability/ability_visibility_context_menu.dart	Origin and landing menus provide placement-edit actions and page transfer menus. Move and Copy actions show feedback for transfer results.

Priority: ⬇️ Low

Estimated code review effort: 4 (Complex) | ~50 minutes

Change: Feature

Sequence Diagram(s)

sequenceDiagram
  participant InteractionStateProvider
  participant LineUpProvider
  participant LineUpPlacementEditor
  InteractionStateProvider->>LineUpProvider: startEdit(linkId)
  LineUpPlacementEditor->>LineUpProvider: update draft endpoint positions
  InteractionStateProvider->>LineUpProvider: saveEdit()
  LineUpProvider-->>InteractionStateProvider: clear edit and record transaction

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sequenceDiagram
  participant LineUpPageMenu
  participant StrategyProvider
  participant TargetPage
  participant CloudQueue
  LineUpPageMenu->>StrategyProvider: sendLineUpsToPage(linkIds, pageId, move)
  StrategyProvider->>TargetPage: append copied lineups locally
  StrategyProvider->>CloudQueue: enqueue copied lineup rows
  StrategyProvider-->>LineUpPageMenu: return transfer result

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Merge Risk: 🟡 Moderate · up to c7fea

Moving or copying several lineups to another cloud page can fail partway through. When that happens, some lineups still appear on the destination page while the app says nothing was copied. Before merging, roll back the partial copy or report it accurately.

Pre-merge checks | 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Docstring Coverage		No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 0…
Linked Issues check		Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check		Check skipped because no linked issues were found for this pull request.
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title accurately describes the copy-to-page feature, which is a real part of the changeset. It omits the move-to-page feature, so it does not fully summarize the main change.

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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 @lib/providers/strategy_provider.dart:
- Around line 1198-1208: Make `_addLineUpsToCloudPage` handle multi-group
enqueue failures atomically: if any `enqueueOffCanvas` call fails, remove the
`LineupAddOp` entries already queued for this attempt before returning
`notSaved`, so no partial copy syncs to the target page.

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• Configuration used: Organization UI
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📥 Commits

Reviewing files that changed from the base of the PR and between 3fe137f and c7fea29.

📒 Files selected for processing (20)

• lib/const/line_provider.dart
• lib/interactive_map.dart
• lib/providers/collab/lineup_editing_presence_provider.dart
• lib/providers/editor_operation_provider.dart
• lib/providers/interaction_state_provider.dart
• lib/providers/strategy_provider.dart
• lib/widgets/dialogs/create_lineup_dialog.dart
• lib/widgets/draggable_widgets/ability/ability_visibility_context_menu.dart
• lib/widgets/draggable_widgets/agents/agent_widget.dart
• lib/widgets/draggable_widgets/lineup_page_menu.dart
• lib/widgets/draggable_widgets/placed_widget_builder.dart
• lib/widgets/line_up_line_painter.dart
• lib/widgets/line_up_placement_editor.dart
• lib/widgets/line_up_placer.dart
• lib/widgets/line_up_widget.dart
• lib/widgets/lineup_control_buttons.dart
• test/lineup_add_item_interaction_test.dart
• test/per_object_undo_test.dart
• test/strategy_page_semantics_test.dart
• test/strategy_page_session_provider_test.dart

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