fix(frontend): drop in-memory handle in DiffDrawer restoreDraft/restoreDeployed

Same UserDraft.remove-without-clearing-in-memory bug as the previous
two commits, this time in the DiffDrawer's "Restore to draft" /
"Restore to deployed" buttons on all four /edit routes. The handler
deletes the DB draft (in the deployed case), wipes the localStorage
entry, navigates, and reloads — but the route's UserDraft handle
still holds the old draft + meta in memory, so the reload's
staleness check compares the stale meta against the freshly fetched
backend and surfaces a spurious "newer version was deployed" modal.

- scripts/edit, flows/edit, apps_raw/edit: route-level handle —
  `handle.setDraftAndMeta(undefined, {})` before the reload.
- apps/edit: the handle lives in the AppEditor child, so force a
  remount by setting `app = undefined; redraw++` before goto/loadApp
  (matches the existing pattern from the toast's onResetToDeployed).

frontend/src/routes/(root)/(logged)/apps/edit/[...path]/+page.svelte

@@ -239,6 +239,12 @@
 		}
 		diffDrawer?.closeDrawer()
 		UserDraft.remove('app', path)
+		// Force AppEditor to unmount so its UserDraft handle releases —
+		// otherwise loadApp's `UserDraft.get` would read the stale autosave
+		// from the still-alive in-memory entry and the staleness check
+		// would fire a spurious "newer version was deployed" modal.
+		app = undefined
+		redraw++
 		goto(`/apps/edit/${savedApp.draft.path}`)
 		await loadApp()
 		redraw++
@@ -258,6 +264,8 @@
 			})
 		}
 		UserDraft.remove('app', path)
+		app = undefined
+		redraw++
 		goto(`/apps/edit/${savedApp.path}`)
 		await loadApp()
 		redraw++

frontend/src/routes/(root)/(logged)/apps_raw/edit/[...path]/+page.svelte

@@ -278,6 +278,11 @@
 		}
 		diffDrawer?.closeDrawer()
 		UserDraft.remove('raw_app', path)
+		// Drop the in-memory handle state so loadApp sees no local draft
+		// on the next pass — otherwise the staleness check would compare
+		// the stale in-memory meta against the freshly fetched backend and
+		// fire a spurious modal.
+		draftHandle.setDraftAndMeta(undefined, {})
 		goto(`/apps/edit/${savedApp.draft.path}`)
 		await loadApp()
 		redraw++
@@ -297,6 +302,7 @@
 			})
 		}
 		UserDraft.remove('raw_app', path)
+		draftHandle.setDraftAndMeta(undefined, {})
 		goto(`/apps/edit/${savedApp.path}`)
 		await loadApp()
 		redraw++

frontend/src/routes/(root)/(logged)/flows/edit/[...path]/+page.svelte

@@ -304,6 +304,11 @@
 		}
 		diffDrawer?.closeDrawer()
 		UserDraft.remove('flow', flowDraftPath)
+		// Drop the in-memory handle state so loadFlow sees no local draft
+		// on the next pass — otherwise the staleness check would compare
+		// the stale in-memory meta against the freshly fetched backend and
+		// fire a spurious modal.
+		flowHandle.setDraftAndMeta(undefined, {})
 		goto(`/flows/edit/${savedFlow.draft.path}`)
 		loadFlow()
 	}
@@ -322,6 +327,7 @@
 			})
 		}
 		UserDraft.remove('flow', flowDraftPath)
+		flowHandle.setDraftAndMeta(undefined, {})
 		goto(`/flows/edit/${savedFlow.path}`)
 		loadFlow()
 	}

frontend/src/routes/(root)/(logged)/scripts/edit/[...path]/+page.svelte

@@ -299,6 +299,11 @@
 		}
 		diffDrawer?.closeDrawer()
 		UserDraft.remove('script', draftPath)
+		// Drop the in-memory handle state so loadScript sees no local draft
+		// on the next pass — otherwise the staleness check would compare the
+		// stale in-memory meta against the freshly fetched backend and fire
+		// a spurious modal.
+		scriptHandle.setDraftAndMeta(undefined, {})
 		goto(`/scripts/edit/${savedScript.draft.path}`)
 		loadScript()
 	}
@@ -317,6 +322,7 @@
 			})
 		}
 		UserDraft.remove('script', draftPath)
+		scriptHandle.setDraftAndMeta(undefined, {})
 		goto(`/scripts/edit/${savedScript.path}`)
 		loadScript()
 	}