Consolidate the duplicated, per-file Lit TemplateResult inspection helper
cluster into one shared, strictly-typed, type-guarded seam at
src/client/src/templateInspection.testSupport.ts, documented as the
testing-guide escape hatch. Migrate PiWebApp.clearQueue.test.ts to it as a
proof and delete its local copies. Tag not-yet-consumed public entry points
with @public so knip does not flag them until Slice B adds consumers.
Relay: testing-skill-compliance leg 1 (Finding 1).
Show a pinned banner at the top of the session view with resource and
runtime diagnostics (skills, prompts, themes, extension load errors) plus
the Anthropic subscription-auth billing notice, recomputed live from the
current runtime so they stay accurate across browser reloads.
Warnings carry an optional dismiss capability; the Anthropic notice is
dismissable and durably suppressed through pi's own anthropicExtraUsage
warning setting. Also fixes the testing-guide skill frontmatter so it
loads.
Seed the in-flight partial assistant message (text, thinking, and
in-progress tool calls) when opening or reconnecting to a session that is
mid-stream, then continue streaming live deltas on top of it. Replaces the
blocking "Catching up..." placeholder and the end-of-turn transcript reload.
Server stamps every per-session UI event with a monotonic seq at the
SessionEventHub publish choke point and exposes
GET /sessions/:sessionId/stream-snapshot returning { seq, partial }. The
client fetches the snapshot on join, seeds the normalized partial into the
in-memory transcript (never the history cache), and applies buffered/live
events using the seq watermark for exactly-once delivery.
The snapshot is a progressive enhancement: a 404 from an older remote
pi-web or a not-yet-restarted session daemon falls back to an empty seed
(seq 0, drops nothing), so sessions still open and stream normally. The
stream-snapshot route is registered in the federation allowlist for
remote-machine proxying.
Make all browser-facing API paths and WebSocket URLs relative so that
vite's <base href> can resolve them correctly when pi-web is served
from a subpath (e.g. /ai or /test/ai).
Also introduce PI_WEB_BASE_PATH so the server can generate plugin
module URLs that include the base path.
