[Work model] Add Task, Epic and Spike across card edit, review and portability

[Chris0Jeky]

Parent: #2087. ADR-0060 already accepts Task, Epic and Spike, with existing cards defaulting to Task. True archive/restore prerequisite #2920 shipped in #2932. Current main 19dc823 has no work-item type.

Deliver one useful card-type vertical before editable hierarchy:

• Add WorkItemType with exactly Task/Epic/Spike, additive migration and tested down path. Existing card IDs, placement, labels, block/archive state and history remain intact; omitted old-client/import fields mean Task on create and unchanged on update.
• Expose authorized direct-human create/edit and a proposal-only automation change with explicit preview, approve/apply, old/new audit and receipt presentation. Invalid enum values fail with stable 400; stale edits, readonly board/card state and denied writers fail without mutation. Proposal preview and apply share validation.
• Preserve type in board JSON import/export (including archived cards), buffered/streamed account export, API/MCP reads and realtime-driven refetch. Imported cards keep the existing fresh-ID policy. No new identity/authority transport.
• Provide a shared accessible type selector/read presentation for Paper and Legacy card details, with errors and stale-write recovery. Existing automation operations lacking type retain their previous meaning.
• Prove domain/application/API, migration/rollback/portability, proposal/MCP authorization, frontend and one real-API browser round trip with synthetic data; typecheck/build/lint and architecture/docs gates.

Non-goals: parent fields/commands, graph validators or dormant hierarchy scaffolding; subtree cascade; assignments/estimates/relations; inference from capture action/decision/question. Those are separate axes. #2087 remains open for its complete parent vertical, including three-links/four-levels, default child detach and reviewed graph drift protection.

Implementation may use existing create/update contracts or a narrow explicit type operation after source inspection; it must not permit direct agent writes. Canonical strategy is unchanged. PR #2937 leases PaperBoardView.vue, and #2931 leases TESTING_GUIDE/package/lockfile; avoid those paths.

[Chris0Jeky]

[Codex lane claim v2]
lane: alpha-product-trust
issue: #2946
base: 19dc823
residual acceptance: Task/Epic/Spike card type across persistence, authorized direct edit, proposal preview/apply, audit, reads, portability and shared card detail UI; parent hierarchy remains #2087
owned paths/modules: Card entity/type, CardDto/import DTOs, CardService/BoardJsonExportImport/DataExport maps, proposal validator/registry/readable diff, narrow MCP type read/propose support, card EF configuration/migration/snapshot; shared CardModal/card-modal controls and board type/API contracts; directly related tests and issue-specific docs
shared-path leases: Card.cs, CardDto.cs, CardService.cs, AutomationProposalService.cs, ProposalOperationContractValidator.cs, OperationHandlerRegistry.cs, migration/model snapshot, types/board.ts, shared CardModal and required locale keys. No TESTING_GUIDE, package/lockfile or PaperBoardView lease.
parallel-safe work: codex-1585-inbox-status-polling (capture store/detail polling fix, frozen for review)
open PRs/branches/review threads checked: archive #2932 merged; Review #2942 and Inbox #2945 disjoint; #2937 owns PaperBoardView preferences; #2931 owns mutation tooling/package/TESTING_GUIDE. No live type/hierarchy writer found on #2087/#2092/#2093/#2240.
human or decision gates: none for the three accepted types
status: active

Project update to Now/III is pending API quota recovery; the last verified queue had only #2009 Now, and this session has no other Now issue. No parent relationship will be exposed by this slice.

[Chris0Jeky]

Live Project inventory refreshed through the Codex read lane: #2009 is the only pre-existing Now item; three Next items. #2946 is now Now, Priority III. The owner GraphQL pool has nine points remaining despite /rate_limit reporting 5,000; routine reads use the configured separate lane. The queued status/priority update succeeded as the owner.

[Chris0Jeky]

[Codex lane release v2]
lane: alpha-product-trust
issue: #2946
PR: #2949
exact head: c9fccd4
result: review
shipped outcome: implementation published; not merged. Task/Epic/Spike persistence, versioned editor/API/proposals, MCP and export preservation.
remaining residual: independent review and exact-head CI
released paths/leases: none until review concludes; claim retained
next dependency now unblocked: none until merge

CLAUDE_SYNC_PACKET
canonical truth changes: minimum UPGRADING.md migration note in PR; STATUS is leased by #2947 and should record this only after merge.
issue/project changes: request issue and PR Review, Priority III, v0.4. Owner GraphQL reset pending until 20:26:26Z; queued for reconciliation.
architecture/decision impact: implements accepted Task/Epic/Spike foundation. Parent hierarchy remains #2087; maximum three links/four levels unchanged.
manual validation still needed: manual screen-reader output not tested; two real-API Chromium Paper/Legacy journeys pass.
human actions: no new decision gate. OUTSTANDING_TASKS.md retains 41 open actions.

[Chris0Jeky]

[Codex lane release v2]
lane: alpha-product-trust
issue: #2946
PR: #2949
exact head: 9735300
result: merged
shipped outcome: Task/Epic/Spike are persisted, version-checked, editable in shared Paper/Legacy card details, represented in proposal preview/apply and audit, and preserved in board/account export and MCP reads/proposals. Old cards and omitted creates default to Task. Merge 7695211 matches reviewed tree 1f253f8da65f8477aab4ff19f05a4df89a4fce63; Required CI34530704819 passed.
remaining residual: none for this vertical; MEDIUM #2950 generic move extra-field parity and #2952 older-board-payload control compatibility remain separately tracked
released paths/leases: Card/DTO/type migration/model snapshot, card service/proposal/export/MCP seams, shared card editor, three cardModal locale catalogs, UPGRADING.md and focused tests
next dependency now unblocked: #2953 parent hierarchy

CLAUDE_SYNC_PACKET
canonical truth changes: UPGRADING.md has the additive migration/down note; minimum STATUS/masterplan type-delivery update belongs to canonical-doc coordinator. Parent hierarchy is not yet implemented.
issue/project changes: #2946 closed; #2949 merged; set both Done/III. #2087 remains open for hierarchy; #2953 now technically unblocked.
architecture/decision impact: executes accepted Task/Epic/Spike ruling; no new type policy
manual validation still needed: no live-model or real screen-reader claim; Paper/Legacy real-API type editing and stale-draft recovery passed
human actions: none added; existing 41 OUTSTANDING_TASKS.md items unchanged

Local proof: full backend9395/5skips, frontend6471/3skips, focused final77API+108Application, mutation guard, 2realAPIChromium journeys, typecheck/build/lint/docs. Bounded review and current-base interaction review passed. Evidence C:\Users\Public\codex-shell-home\taskdeck-alpha-evidence\2946.