docs(6208): the remaining frontend comments drop milestone, step and rule citations

Components, stores, api clients, router, types and shared CSS now state what
each piece is and why, without the milestone that introduced it. diff.ts
names its consumers instead of the copy history; stores/notes and tasks state
their current scope instead of the cleanup that set it; theme.css states the
token practice instead of the sweep that established it.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

frontend/src/stores/canonicalSystems.ts

@@ -6,7 +6,7 @@ import { useToastStore } from "@/stores/toast";
 import { apiErrorMessage } from "@/api/client";
 
 /**
- * The global area catalog (milestone 307). Shared by every project, so it is
+ * The global area catalog. Shared by every project, so it is
  * fetched ONCE per session rather than per project — the whole point of the
  * table is that it is the same list everywhere.
  */

frontend/src/stores/moments.ts

@@ -6,7 +6,7 @@ import { useToastStore } from "@/stores/toast";
 import { apiErrorMessage } from "@/api/client";
 
 /**
- * The moment catalog and this install's mappings (milestone 458 step 6).
+ * The moment catalog and this install's mappings.
  *
  * Shared by the rule editor's picker and the Settings section, so the two
  * cannot offer different moments. The catalog is the product's and changes

frontend/src/stores/notes.ts

@@ -4,10 +4,8 @@ import { apiGet, apiPost, apiPut, apiDelete } from "@/api/client";
 import { useToastStore } from "@/stores/toast";
 import type { Note } from "@/types/note";
 
-// Single-note + mutation surface. The list/filter/sort/pagination surface that
-// backed the removed /notes list view was dropped in the 2026-06-02 drift-audit
-// cleanup (no consumers — KnowledgeView and the editors use single-entity and
-// mutation methods only).
+// Single-note + mutation surface. There is no list/filter/sort here:
+// KnowledgeView and the editors use single-entity and mutation methods only.
 export const useNotesStore = defineStore("notes", () => {
   const currentNote = ref<Note | null>(null);
   const loading = ref(false);

frontend/src/stores/platforms.ts

@@ -4,7 +4,7 @@ import * as api from "@/api/platforms";
 import type { Platform } from "@/api/platforms";
 
 /**
- * The global platform catalog (milestone 463). Shared by every project, so
+ * The global platform catalog. Shared by every project, so
  * it is fetched once per session — as the canonical-area catalog is.
  */
 export const usePlatformsStore = defineStore("platforms", () => {

frontend/src/stores/rulebooks.ts

@@ -142,7 +142,7 @@ export const useRulebooksStore = defineStore("rulebooks", () => {
     return rule;
   }
 
-  /** After a move (milestone 414): take the rule out of whichever topic list
+  /** After a move: take the rule out of whichever topic list
    *  held it, and into its new topic's list if that one is loaded. A rule moved
    *  onto a project belongs to no topic list at all. */
   function placeMovedRule(rule: Rule) {

frontend/src/stores/tasks.ts

@@ -14,9 +14,8 @@ interface IssueFields {
   arose_from_id?: number | null;
 }
 
-// Single-task + mutation surface. The list/filter/sort/pagination surface that
-// backed the removed /tasks list view was dropped in the 2026-06-02 drift-audit
-// cleanup (no consumers — ProjectView's kanban keeps its own local task list).
+// Single-task + mutation surface. There is no list/filter/sort here:
+// ProjectView's kanban keeps its own local task list.
 export const useTasksStore = defineStore("tasks", () => {
   const currentTask = ref<Task | null>(null);
   const loading = ref(false);