feat(react/floating_buttons): port in-app help button

apps/client/src/services/in_app_help.ts

@@ -0,0 +1,43 @@
+import { NoteType } from "@triliumnext/commons";
+import { ViewTypeOptions } from "./note_list_renderer";
+import { FNote } from "./frontend_script_entrypoint";
+
+export const byNoteType: Record<Exclude<NoteType, "book">, string | null> = {
+    canvas: null,
+    code: null,
+    contentWidget: null,
+    doc: null,
+    file: null,
+    image: null,
+    launcher: null,
+    mermaid: null,
+    mindMap: null,
+    noteMap: null,
+    relationMap: null,
+    render: null,
+    search: null,
+    text: null,
+    webView: null,
+    aiChat: null
+};
+
+export const byBookType: Record<ViewTypeOptions, string | null> = {
+    list: "mULW0Q3VojwY",
+    grid: "8QqnMzx393bx",
+    calendar: "xWbu3jpNWapp",
+    table: "2FvYrpmOXm29",
+    geoMap: "81SGnPGMk7Xc",
+    board: "CtBQqbwXDx1w"
+};
+
+export function getHelpUrlForNote(note: FNote | null | undefined) {
+    if (note && note.type !== "book" && byNoteType[note.type]) {
+        return byNoteType[note.type];
+    } else if (note?.hasLabel("calendarRoot")) {
+        return "l0tKav7yLHGF";
+    } else if (note?.hasLabel("textSnippet")) {
+        return "pwc194wlRzcH";
+    } else if (note && note.type === "book") {
+        return byBookType[note.getAttributeValue("label", "viewType") as ViewTypeOptions ?? ""]
+    }
+}