Rough edges: mobile 100dvh, session-expiry in chat, sticky error toasts, journal date filter (#93)

Part of #85. 100vh→100dvh on both full-height pages (editor + public), a 401
during chat now redirects to /login instead of mislabelling a dead session as
"assistant broken", error toasts persist (capped at 4) with a close button, and
the journal's built-but-unreachable date filter gets a UI. Gadfly round handled
(public-page 100dvh, toast cap, shared date-input class). Larger deferred items
(revision retention, agent toolbox gaps) noted for their own issues.

web/src/components/ui/toast.tsx

@@ -17,9 +17,16 @@ interface ToastState {
 
 let nextId = 1
 
+// Error toasts no longer auto-dismiss (#85), so a burst of failures could grow
+// the stack without bound and push older ones off-screen. Cap it: keep the most
+// recent MAX_TOASTS and drop the oldest, so the newest — the one that just
+// happened — is always visible.
+const MAX_TOASTS = 4
+
 export const useToastStore = create<ToastState>((set) => ({
   toasts: [],
-  push: (message, tone = 'info') => set((s) => ({ toasts: [...s.toasts, { id: nextId++, message, tone }] })),
+  push: (message, tone = 'info') =>
+    set((s) => ({ toasts: [...s.toasts, { id: nextId++, message, tone }].slice(-MAX_TOASTS) })),
   dismiss: (id) => set((s) => ({ toasts: s.toasts.filter((t) => t.id !== id) })),
 }))
 
@@ -32,21 +39,34 @@ export const toast = {
 // Param is `item`, not `toast`, so it doesn't shadow the module's `toast` export.
 function ToastItem({ item }: { item: Toast }) {
   const dismiss = useToastStore((s) => s.dismiss)
+  const isError = item.tone === 'error'
   useEffect(() => {
+    // Error toasts are the primary report that a mutation failed, so they do NOT
+    // auto-dismiss — a user who looked away at second 4 would otherwise lose the
+    // only notice, with nothing to retrieve (#85). Info toasts still time out.
+    if (isError) return
     const t = setTimeout(() => dismiss(item.id), 4000)
     return () => clearTimeout(t)
-  }, [item.id, dismiss])
+  }, [item.id, dismiss, isError])
   return (
     <div
-      role={item.tone === 'error' ? 'alert' : 'status'}
+      role={isError ? 'alert' : 'status'}
       className={cn(
-        'pointer-events-auto rounded-md border px-3 py-2 text-sm shadow-md',
+        'pointer-events-auto flex items-start gap-2 rounded-md border px-3 py-2 text-sm shadow-md',
-        item.tone === 'error'
+        isError
           ? 'border-red-500/40 bg-red-500/10 text-red-700 dark:text-red-300'
           : 'border-border bg-surface text-fg',
       )}
     >
-      {item.message}
+      <span className="flex-1">{item.message}</span>
+      <button
+        type="button"
+        onClick={() => dismiss(item.id)}
+        aria-label="Dismiss"
+        className="-mr-1 shrink-0 rounded px-1 text-current opacity-60 outline-none hover:opacity-100 focus-visible:ring-2 focus-visible:ring-current/40"
+      >
+        ✕
+      </button>
     </div>
   )
 }

web/src/editor/JournalPanel.tsx

@@ -16,6 +16,11 @@ import {
 import type { EditorObject } from './types'
 import { objectDisplayName } from './kinds'
 
+// Shared styling for the small From/To date inputs, so the two stay in step and
+// don't drift from each other.
+const dateInputClass =
+  'rounded-md border border-border bg-surface px-1.5 py-1 text-fg outline-none focus-visible:ring-2 focus-visible:ring-accent/40'
+
 /**
  * The garden's journal: write an entry, read the season back.
  *
@@ -42,7 +47,15 @@ export function JournalPanel({
   scopeObjectId: number | null
   onScopeChange: (id: number | null) => void
 }) {
-  const filter = scopeObjectId != null ? { objectId: scopeObjectId } : {}
+  // Date-range narrowing (#85): the backend and JournalFilter already supported
+  // from/to; they just had no UI. Empty inputs don't filter.
+  const [from, setFrom] = useState('')
+  const [to, setTo] = useState('')
+  const filter = {
+    ...(scopeObjectId != null ? { objectId: scopeObjectId } : {}),
+    ...(from ? { from } : {}),
+    ...(to ? { to } : {}),
+  }
   const journal = useJournal(gardenId, filter)
   const entries = journal.data?.pages.flatMap((p) => p.entries) ?? []
   const scopedObject = objects.find((o) => o.id === scopeObjectId) ?? null
@@ -70,6 +83,41 @@ export function JournalPanel({
         )}
       </div>
 
+      <div className="flex items-center gap-2 text-xs text-muted">
+        <label className="flex items-center gap-1">
+          <span>From</span>
+          <input
+            type="date"
+            value={from}
+            max={to || undefined}
+            onChange={(e) => setFrom(e.target.value)}
+            className={dateInputClass}
+          />
+        </label>
+        <label className="flex items-center gap-1">
+          <span>To</span>
+          <input
+            type="date"
+            value={to}
+            min={from || undefined}
+            onChange={(e) => setTo(e.target.value)}
+            className={dateInputClass}
+          />
+        </label>
+        {(from || to) && (
+          <button
+            type="button"
+            onClick={() => {
+              setFrom('')
+              setTo('')
+            }}
+            className="rounded px-1 text-muted outline-none hover:text-fg focus-visible:ring-2 focus-visible:ring-accent/40"
+          >
+            Clear
+          </button>
+        )}
+      </div>
+
       {canEdit && (
         <Composer
           gardenId={gardenId}

web/src/lib/agent.ts

@@ -160,6 +160,15 @@ export async function streamChat(
     handlers.onError('Could not reach the server.')
     return
   }
+  if (res.status === 401) {
+    // Session expired mid-conversation (#85). Reporting this as "the assistant is
+    // unavailable" would send the user chasing a config problem that isn't there.
+    // Send them to sign in again, preserving where they were.
+    handlers.onError('Your session has expired — please sign in again.')
+    const back = encodeURIComponent(location.pathname + location.search)
+    window.location.assign(`/login?redirect=${back}`)
+    return
+  }
   if (!res.ok || !res.body) {
     // 503 is the assistant being turned off at runtime (#79) — the route exists,
     // there's just no model behind it. Distinct from a 404, which would mean the

web/src/pages/GardenEditorPage.tsx

@@ -398,8 +398,11 @@ export function GardenEditorPage() {
     })
   }
 
+  // 100dvh, not 100vh: on mobile Safari/Chrome 100vh is the *largest* viewport
+  // (URL bar hidden), so with the bar showing the editor overflowed and pushed
+  // the canvas bottom + Fit button under the browser chrome (#85).
   return (
-    <div className="flex h-[calc(100vh-8rem)] flex-col gap-3 md:flex-row">
+    <div className="flex h-[calc(100dvh-8rem)] flex-col gap-3 md:flex-row">
       <div className="shrink-0 md:w-40">
         <h1 className="mb-2 truncate text-lg font-semibold tracking-tight" title={garden.name}>
           {garden.name}

web/src/pages/PublicGardenPage.tsx

@@ -53,7 +53,7 @@ export function PublicGardenPage() {
   }
 
   return (
-    <div className="flex h-[calc(100vh-8rem)] flex-col gap-3">
+    <div className="flex h-[calc(100dvh-8rem)] flex-col gap-3">
       <div className="flex flex-wrap items-center gap-2">
         <h1 className="truncate text-lg font-semibold tracking-tight" title={garden.name}>
           {garden.name}