feat: complete agentic ACP workflow and pinned editor tabs (#4767)

• docs: design editor pinned tabs

• docs: design ACP chat queued turns

• feat(editor): add pinned tab state model

• test(editor): avoid pinned tab cleanup race

• feat(editor): integrate pinned tabs with tab lifecycle

• fix(editor): reconcile pin state after edge drops

• feat(editor): protect pinned tabs from close actions

• fix(editor): activate close-to-right target

• feat(editor): persist pinned tab state

• feat(editor): add pin tab commands and menus

• test(editor): cover pinned tab commands and menus

• feat(extension): expose pinned editor tabs

• fix(extension): refresh pinned tab on move

• feat(editor): render and test pinned tabs

• fix(editor): hide clean pinned dirty indicator

• fix(editor): remove unused bulk-close resource

• fix(opened-editor): retain pinned tabs after close all

• fix(editor): harden pinned tab interactions

• fix(editor): keep pinned tabs reachable across layout changes

• chore: ignore local worktrees

• feat(acp): create sessions for explicit task targets

• feat(agentic): persist projects and task metadata

• fix(agentic): restrict task archiving to terminal states

• feat(agentic): bind ACP sessions to durable tasks

• fix(agentic): synchronize ACP task attention

• feat(agentic): switch workspaces for task selection

• fix(agentic): guard workspace handoffs

• fix(agentic): retain newer workspace handoffs

• feat(agentic): add persistent project task list

• fix(agentic): use full project catalog for task list

• feat(agentic): compose task list inside chat slot

• fix(agentic): restore archived tasks from task list

• test(agentic): cover persistent task list workbench

• test(agentic): harden task list acceptance coverage

• test(agentic): require ready task before archive

• fix(agentic): seed project catalog for first task

• test(agentic): target visible task workbench

• fix(agentic): harden task workbench restore

• docs: plan ACP chat queued turn implementation

• fix(agentic): improve task list project controls

• feat(ai-native): add ACP queued turn module

• fix(ai-native): harden ACP queued turn lifecycle

• test(ai-native): harden queued turn lifecycle coverage

• feat(ai-native): complete ACP queued turn transitions

• docs: design pinned tabs bdd scenario

• fix(ai-native): isolate queued turn transitions

• docs: plan pinned tabs bdd scenario

• test: add pinned tabs bdd scenario

• fix(agentic): protect task launch defaults

• fix(ai-native): preserve initial session promotion

• fix(ai-native): preserve latest stop intent

• docs: add editor pin tab implementation plan

• refactor(ai-native): add chat input turn capabilities

• fix(ai-native): harden chat input registry contracts

• fix(ai-native): enforce unique chat input ids

• refactor(ai-native): route ACP sends through queued turns

• fix(ai-native): harden queued turn view lifecycle

• fix(ai-native): guard queued turn async boundaries

• refactor(ai-native): extract reusable ACP turn editor

• fix(ai-native): harden ACP turn editor drafts

• fix(ai-native): preserve multiline turn drafts

• feat(ai-native): add queued turn editing controls

• fix(ai-native): harden queued turn interactions

• fix(ai-native): complete queued turn editing edges

• feat(ai-native): align ACP chat input behavior

• fix(ai-native): preserve ACP input drafts across async actions

• fix(ai-native): preserve rejected queued edits

• fix(ai-native): harden async ACP submissions

• test(ai-native): add queued turn behavior scenarios

• test(ai-native): harden queued turn bdd scenarios

• docs(bdd): correct queued turn runtime assertions

• docs: design agentic task list workbench styling

• docs: plan agentic task list workbench styling

• fix(ai-native): make tool cards keyboard accessible

• fix(ai-native): isolate collapsed tool content

• fix(ai-native): close queued turn review findings

• fix(ai-native): preserve corrective queue ownership

• fix(ai-native): skip stale queued turn cancellation

• fix(ai-native): trust thread status for queued cancellation

• fix(ai-native): make queued cancellation idempotent

• fix(ai-native): cancel active host without observer

• feat: align agentic task list with workbench style

• feat(ai-native): make agentic tasks session-first

• feat(ai-native): preserve ACP tasks across browser reload

• fix: remove agent name from ACP placeholder

• fix(ai-native): recover ACP sends after awaiting prompt

• fix(ai-native): simplify task list status display

• feat(ai-native): warm up ACP agent pool

• fix(ai-native): soften task list new task action

• fix(ai-native): prioritize sessions over ACP warmup

• fix(ai-native): close ACP pool concurrency races

• fix(ai-native): gate ACP pool shutdown lifecycle

• fix(ai-native): surface ACP pool saturation

• fix(ai-native): preserve ACP saturation errors

• docs(bdd): specify ACP pool warmup recovery

• test(ai-native): align ACP saturation contract

• fix(ai-native): preserve healthy ACP processes

• refactor(ai-native): clarify ACP capacity allocation

• fix(ai-native): release failed ACP session resources

• feat(ai-native): streamline new chat and task actions

• feat(ai-native): complete agentic workflow updates

• test(bdd): align feat 0710 acceptance scenarios

• fix(ai-native): harden agentic layout and BDD coverage

• feat(ai-native): recover tasks through originating ACP agent

• feat(ai-native): compact agent task rows

• refactor(ai-native): simplify agent task metadata

• fix(ai-native): clarify task status tooltip

• feat(ai-native): enhance ACP chat workflow

• rm docs

• rm docs

• rm context

• fix(ai-native): restore new task icon

• test(extension): stabilize main thread editor lifecycle

• fix: resolve lint import order error

• fix(ai): stabilize ACP chat e2e lifecycle

• fix(ai): ignore stale queued turn cancellation

• fix(ai-native): preserve task history when session attach fails