Fix portal timeline import paths after shared move

Context

The operator reported that the portal app is unstable after the first resolved #12204 foundation PRs. The visible failure on /news/tickets is a dynamic-import failure for apps/portal/view/news/tickets/MainContainer.mjs.

This ticket is intentionally narrow: the tickets tab is stuck because the shared timeline view-glue moved under apps/portal/view/content/, but its framework imports still walk up one directory too far.

Duplicate sweep completed before filing:

• ask_knowledge_base(query='Portal CanvasWrapper TimelineCanvas import path dynamic import tickets tab regression', type='ticket') surfaced older TimelineCanvas regressions, but none for the new shared-content import path break.
• rg across resources/content/{issues,archive/issues,discussions,archive/discussions} found historical dynamic-import and TimelineCanvas tickets, but no equivalent active ticket for the CanvasWrapper / TimelineCanvas post-move path regression.
• GitHub issue searches for the exact dynamic-import symptom and Portal.view.content.CanvasWrapper returned no duplicate.

The Problem

Portal.view.news.TabContainer lazy-loads the tickets tab via module: () => import('./tickets/MainContainer.mjs'). Live NL verification shows /news/tickets active but the tab body item remains isLoading: true and no Portal.view.news.tickets.MainContainer component mounts.

A direct ESM import falsifier exposes the underlying dependency break:

Error [ERR_MODULE_NOT_FOUND]: Cannot find module '/Users/Shared/codex/neomjs/src/container/Base.mjs' imported from /Users/Shared/codex/neomjs/neo/apps/portal/view/content/CanvasWrapper.mjs

From apps/portal/view/content/, ../../../../../src/... resolves above the repo root. The correct depth is ../../../../src/....

The Architectural Reality

The #12204 foundation refactor promotes shared timeline view-glue out of apps/portal/view/news/tickets/ and into apps/portal/view/content/.

Current source anchors:

• apps/portal/view/news/tickets/MainContainer.mjs:1 imports ../../content/CanvasWrapper.mjs.
• apps/portal/view/content/CanvasWrapper.mjs:1 imports ../../../../../src/container/Base.mjs, which resolves one level too high from its new directory.
• apps/portal/view/content/TimelineCanvas.mjs:1 has the same depth issue for ../../../../../src/app/SharedCanvas.mjs.
• The relevant styling surface already moved to resources/scss/src/apps/portal/content/CanvasWrapper.scss; ticket work must keep the shared content SCSS honored and must not silently strand theme-specific portal ticket overrides under resources/scss/theme-neo-{light,dark}/apps/portal/news/tickets/.

The Fix

• Correct the shared content imports in apps/portal/view/content/CanvasWrapper.mjs and apps/portal/view/content/TimelineCanvas.mjs from five parent traversals to four.
• Re-run the ESM import-chain falsifier until it reaches the expected runtime-only Neo global boundary instead of ERR_MODULE_NOT_FOUND.
• Re-verify /news/tickets through Neural Link: the tickets main component must mount and the tab body must leave isLoading.
• Check the portal SCSS paths touched by the move so the shared CanvasWrapper styling and existing light/dark ticket component overrides remain in the cascade.

Decision Record impact

none

Acceptance Criteria

• node --input-type=module -e "await import('./apps/portal/view/news/tickets/MainContainer.mjs')" no longer fails with ERR_MODULE_NOT_FOUND for apps/portal/view/content/* imports.
• Neural Link verification of /news/tickets shows Portal.view.news.tickets.MainContainer mounted under the news tab instead of a permanent loading item.
• The tickets tab retains its shared canvas wrapper styling path under resources/scss/src/apps/portal/content/CanvasWrapper.scss and does not drop existing light/dark ticket component theme overrides.
• No route/tab config changes are made unless a new falsifier proves they are required.

Out of Scope

• Implementing PR or Discussion views from #12204.
• Chunked lazy-load tree work (#12217-#12219).
• Reworking the timeline parser, canvas physics, or route defaults.
• Broad theming redesign beyond preserving the moved/shared style surfaces.

Avoided Traps

• Do not hide the regression under the broad #12204 epic; this is a narrow import-path break with a concrete falsifier.
• Do not revert the shared content move from #12206; the move is the right shape, but its relative imports must be updated for the new directory.
• Do not treat the browser's MainContainer.mjs dynamic-import error as proof that MainContainer.mjs itself is missing; dependency import failure surfaces at the lazy module boundary.

Related

• Parent epic: #12204
• Regression source area: #12206
• Open adjacent portal foundation lane: #12209

Handoff Retrieval Hints

• portal tickets dynamic import CanvasWrapper TimelineCanvas relative path
• apps/portal/view/content CanvasWrapper ../../../../../src ERR_MODULE_NOT_FOUND
• NL /news/tickets isLoading true Portal.view.news.tickets.MainContainer not mounted