[lbx154]

Smooths four rough edges of the map canvas (design/canvas.md; experience rules 1, 3, 5).

What changes

1. Links start anywhere on a card's edge. ConnectSource (CanvasNodes.tsx) adds four invisible edge strips as React Flow source handles on person and task cards. Each strip is about 14 screen px wide at any zoom (rimWidth, stepped zoom) and never more than a fifth of the card. Handles carry nodrag, so the middle of a card still drags, and a plain click still reaches the card. Hovering a card tints its edge, and the strip under the pointer is darker. The old dot is still there. connectOnClick={false} stops a click on an edge from starting a half-made link. MacroTaskNode only swaps its single dot Handle for <ConnectSource> (a one-line change).
2. Person cards can be read at overview zoom. When a card's body text would be smaller than 12 px on screen, the card drops its header and size line. Instead it shows its text (or file name) as a bold two-line label sized for about 14 px on screen, kept inside the card (farLabelFont). It switches back to the full card when zoomed in, and also while editing.
3. Other windows see canvas changes within a second. Every accepted canvas write appends project.canvas.updated {revision, change} to the project's event log. That log is the live websocket stream the web client already reads. App.tsx takes the newest announced revision, and refreshCanvas refetches only when that revision is ahead of the window's cached copy, so the window that made the write does not refetch. The new event type is in the catalog, the payload schema, eventCatalog.ts and the generated fixtures, and the shared renderer hides it from the feed.
4. The Manager sees the canvas on team reports too. manager_team_report (the /manager/team-turn push path) now appends manager_canvas_context() to its turn. The chat router's manager_turn path on dev already included it. domain_intake is unchanged: adding it there would mean argus/manager importing from webapi.

Verified

• Real browser on a private state copy (port 8996, token dev, no model calls), with two windows open on one project:
  • A card added in window A showed up in window B after 0.2–0.4 s.
  • Dragging from a card's top edge onto a task card opened the link-kind menu, and the link was saved.
  • Dragging from the middle of a card moved it 35 px and did not open a link.
  • Clicking on an edge did not open a link.
  • At overview zoom (0.157), person-card labels measured 13.9 px on screen. At 0.076 they measured 13.9 px (idea cards) and 8.6 px (file cards, held back by the two-line fit).
• Web vitest: 1426 passed. tsc: clean. TUI node tests: 299 passed, 0 failed.
• pytest: tests/webapi, tests/core, tests/life, tests/release_tools and the architecture invariants all pass except one: test_private_modules_are_not_imported_across_packages (webapi -> argus.life.delivery._referenced_path_candidates). It fails the same way on unchanged dev, so this PR did not cause it.
• ruff: clean. Release artifacts rebuilt with build_release.

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