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StoryView was the last "master-data" god-view whose script section
still owned state, fetch, CRUD methods, table config, and three dialog
templates in one file. Mirrors the Candidate 2 TaskView decomposition
pattern.

- src/components/story/StoryTable.vue        — v-data-table + three
                                                Map<id, name> computeds
                                                for O(1) display lookup
                                                (replaces O(n^2) find);
                                                emits @edit / @delete
- src/components/story/StoryEditDialog.vue   — create+edit merged via
                                                nullable `story` prop;
                                                owns save flow + inline
                                                error alert
- src/components/story/StoryDeleteDialog.vue — owns deleteStory call,
                                                isDeleting, inline
                                                error; preserves the
                                                existing 48-line UX
- src/composables/useFlashMessage.js         — { message, show, clear }
                                                with built-in 3s
                                                auto-dismiss
- src/__tests__/composables/useFlashMessage.spec.js — 13 tests
                                                       (fake timers)

Key design choices (settled via /grilling before implementation):

1. Dialog seam shape is explicit props+events — :open, :story,
   @close, @saved, @deleted. Not v-model. Keeps multiple emits
   semantically distinct.

2. Lookup data (students/subjects/terms) lives in StoryView as raw
   refs and is passed down to children. No useMasterData composable —
   that scope belongs to Candidate A (useCrudList).

3. StoryEditDialog handles create+edit (TaskEditDialog pattern), with
   @saved carrying the backend response so the parent can do
   { ...existing, ...updated } merge and pick up audit fields
   (created_at, last_updated_at, etc.).

4. StoryDeleteDialog owns the delete flow internally — parent just
   wires @deleted(id) to a list splice. The existing
   "close-edit-after-delete" contract is preserved via the parent's
   onStoryDeleted handler.

5. Row-level delete is now in StoryTable (mdi-delete icon next to
   edit). Replaces the awkward "open edit -> click delete inside edit
   dialog -> confirm" three-click path with a two-click one.

6. console.log calls in StoryView removed (match TaskEditDialog's
   console.error-only pattern; CLAUDE.md says services log heavily,
   not components).

StoryView is now a thin orchestrator: refs, two fetch functions,
open/close handlers, two merge handlers. fetchStories still depends
on fetchRelatedData completing first (sequential await, NOT
Promise.all — see comment in onMounted). Tests 178 -> 191.
Co-Authored-By: Claude <noreply@anthropic.com>