Address Gadfly findings on #85

- PublicGardenPage had the same 100vh mobile bug I fixed in the editor — 100dvh
  there too, so the fix is consistent across both full-height pages.
- Cap the toast stack at 4 (drop oldest). Now that error toasts don't auto-
  dismiss, a burst of failures could otherwise grow the stack unbounded and push
  the newest — the one that just happened — off-screen.
- Hoist the From/To date-input styling to a shared dateInputClass const so the
  two don't drift.

Not taken: reusing safeRedirectPath for the 401 redirect (it validates an
incoming redirect param, it doesn't build the outgoing one — the two uses don't
overlap), and refactoring the three-branch filter spread (it's clear at three
fields; a helper earns its keep when there are more).

Co-Authored-By: Claude Opus 4.8 (1M context) <[email protected]>
Claude-Session: https://claude.ai/code/session_01H3zbym8Doka2d7D48maSgZ

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.
  *
@@ -86,7 +91,7 @@ export function JournalPanel({
             value={from}
             max={to || undefined}
             onChange={(e) => setFrom(e.target.value)}
-            className="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"
+            className={dateInputClass}
           />
         </label>
         <label className="flex items-center gap-1">
@@ -96,7 +101,7 @@ export function JournalPanel({
             value={to}
             min={from || undefined}
             onChange={(e) => setTo(e.target.value)}
-            className="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"
+            className={dateInputClass}
           />
         </label>
         {(from || to) && (