dtrentin cf394bab31 refactor: v0.2.1 refinements — HttpClient lifetime, disconnection UX, DataGrid

Post-v0.2 polish (no behavior regressions; 127 tests + 2 docker integration green).

- MTConnect: shared static HttpClient (Timeout=Infinite) + per-request timeout
  via linked CancellationTokenSource. Fixes socket-exhaustion risk from
  new-HttpClient-per-driver on config edits / dynamic monitor reload.
- Disconnection UX: dashboard + detail show connection state with color
  (green/red/grey dot + badge) via StatusKindToBrush converter; LastSeen
  timestamp preserved across disconnects. VMs stay framework-agnostic.
- Delete confirm: VM-driven overlay naming the machine (replaces two-state
  button) to prevent accidental deletion.
- Dashboard table: switched to DataGrid — aligned columns + Details gets its
  own column (fixes row misalignment). Adds Avalonia.Controls.DataGrid 11.3.10.

PAUL: roadmap re-sequenced — v0.3 Data-Item Selection + UX, OPC UA → v0.4,
Fanuc → v0.5, History → v0.6.

Touches: Junction.Protocols.MTConnect, Junction.App, tests, .paul/.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

2026-07-22 00:09:48 +02:00

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Project State

Project Reference

See: .paul/PROJECT.md (updated 2026-07-21)

Core value: Operators see live state of every configured machine across heterogeneous protocols in one place, adding machines/protocols without code. Current focus: v0.2 + v0.2.1 shipped → starting v0.3 Data-Item Selection

Current Position

Milestone: v0.2 Machine Management UX (+ 2.1 refinements) — SHIPPED Phase: 2 ✓, 2.1 ✓ → next Phase 3 (Data-Item Selection) Plan: 02-A/B/C ✓, 02.1 R1/R2R3/tablefix ✓ Status: v0.2.1 committing; v0.3 backend next Last activity: 2026-07-22 — v0.2.1 done: shared HttpClient, disconnection UX, delete-confirm overlay, dashboard DataGrid (aligned + Details column). Build 0/0, 127 tests + 2 docker-skip.

Progress:

v0.2 (+2.1): [██████████] 100%
Next: Phase 3 Data-Item Selection

Loop Position

PLAN ──▶ APPLY ──▶ UNIFY
  ✓        ✓        ✓     [v0.2.1 complete → PLAN Phase 3]

Standing Authorization

Auto-commit + push GREEN chunks (build 0-err + tests pass) to origin/main WITHOUT asking (user-granted 2026-07-22). Never commit red; no force-push; artifact leak-check each time.

Accumulated Context

Decisions

Decision	Phase	Impact
net48 mandatory (Win7/8 fleet)	1	Constrains all deps; Avalonia 11.3.x, Dapper not EF Core
App multi-target net48;net8.0 (no DevHead)	1	Dev on Linux net8.0, ship net48
Dynamic plugins Assembly.LoadFrom	1	Add protocols without touching core
Monitor dynamic API (AddOrUpdate/Remove)	2	Config changes take effect live, no restart

Deferred Issues

Issue	Origin	Effort	Revisit
HttpClient created per driver in MTConnect factory	1	S	If drivers recreated frequently (socket exhaustion)
Robust disconnection UX (state flip nuances)	2	S	After config CRUD lands

Blockers/Concerns

None.

Boundaries (Active)

M2-C touches: src/Junction.App/* (config VM/View, nav, dashboard/detail buttons, Bootstrapper) + src/Junction.Core (AvailableProtocols only) + tests.
Do NOT touch Domain/Persistence/Protocols in M2-C.

Session Continuity

Last session: 2026-07-21 Stopped at: M2 complete — 3 screens (dashboard/detail/config), offline detection, dynamic monitor reload. Build 0/0, 125 tests + 2 docker-skip. NOT yet committed. Next action: commit + push v0.2 (code + .paul/) when user authorizes → then plan v0.3 OPC UA (/paul:plan). Note: OPC UA research Likely (SDK on net48). Resume context: Manager mode (dotnet-manager), all code delegated to subagents. Full detail in ~/.claude memory/junction-project.md. v0.1 committed 507753f on origin/main; v0.2 uncommitted.

STATE.md — Updated after every significant action

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