feat(ui): close 6 P1 audit findings + 1 bonus mobile fix (Sprint 2)

- Dashboard MealCard: title truncate -> line-clamp-2, image shrinks to
  40x40 on <md to give the title room (B6).
- MealDetail: hero reworked to normal flow with stronger gradient;
  description runs through new cleanDescription() helper that strips
  14 spoonacular SEO patterns and trims to the last full sentence.
  Raw description moved to a 'Notes from source' disclosure (B7).
- Pantry: free-text aisle/unit replaced with <Select> populated from
  the new PANTRY_AISLES canonical enum; ingredient name field marked
  required. New PANTRY_AISLES export + PantryAisle type in types (B8).
- backend: alembic 0015_normalize_pantry_aisles maps free-text
  ingredient.aisle and grocery_item.aisle to canonical labels in a
  single transaction; downgrade raises (restore from snapshot).
  backend/scripts/dry_run_aisle_migration.sql is the read-only
  preview helper.
- ShoppingList: human-readable AISLE_LABEL map replaces raw snake_case
  aisle keys; 3-col stat grid with compact mobile sizing (B9 + S3.3).
- Pantry table: role/aria-label region and a right-edge white
  gradient hint at mobile horizontal overflow (B10).
- Recipes: pending/applied filter split, Apply and Reset buttons,
  active-count chip on the Filters button, role=region + aria-label
  on the panel (B11).
- Review/sprint2-verification.md and fix-ui-audit.md updated.

Build: npm run build (tsc + vite) green. tsc emits 0 errors.

Co-located audit + plan docs kept in sync: Review/ui-nielsen-audit.md
gains a Sprint 2 status block; fix-ui-audit.md has implementation
notes for each Sprint 2 task.

backend/alembic/versions/0015_normalize_pantry_aisles.py

@@ -0,0 +1,101 @@
+"""Normalize ingredient.aisle and grocery_item.aisle to canonical labels.
+
+Revision ID: 0015
+Revises: 0014
+Create Date: 2026-06-02
+"""
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "0015"
+down_revision: Union[str, None] = "0014"
+branch_labels: Union[Sequence[str], None] = None
+depends_on: Union[Sequence[str], None] = None
+
+
+CANONICAL_AISLES = (
+    "Produce",
+    "Meat & Seafood",
+    "Dairy & Eggs",
+    "Pantry",
+    "Frozen",
+    "Bakery",
+    "Beverages",
+    "Spices",
+    "Other",
+)
+
+# Map from lowercased source value to canonical label. Keep the rule
+# order narrow -> broad; longest matches win via SQL CASE.
+NORMALIZATION_RULES = [
+    ("canned goods", "Pantry"),
+    ("canned", "Pantry"),
+    ("freezer", "Frozen"),
+    ("frozen", "Frozen"),
+    ("produce", "Produce"),
+    ("fruit", "Produce"),
+    ("vegetable", "Produce"),
+    ("dairy", "Dairy & Eggs"),
+    ("eggs", "Dairy & Eggs"),
+    ("cheese", "Dairy & Eggs"),
+    ("milk", "Dairy & Eggs"),
+    ("yogurt", "Dairy & Eggs"),
+    ("meat", "Meat & Seafood"),
+    ("seafood", "Meat & Seafood"),
+    ("fish", "Meat & Seafood"),
+    ("chicken", "Meat & Seafood"),
+    ("beef", "Meat & Seafood"),
+    ("pork", "Meat & Seafood"),
+    ("meat_seafood", "Meat & Seafood"),
+    ("bakery", "Bakery"),
+    ("bread", "Bakery"),
+    ("beverage", "Beverages"),
+    ("beverages", "Beverages"),
+    ("drinks", "Beverages"),
+    ("spice", "Spices"),
+    ("spices", "Spices"),
+    ("seasoning", "Spices"),
+    ("pantry", "Pantry"),
+    ("dry", "Pantry"),
+    ("snack", "Pantry"),
+    ("snacks", "Pantry"),
+]
+
+CASE_EXPR = "CASE LOWER(COALESCE(aisle, '')) " + " ".join(
+    f"WHEN '{src}' THEN '{dst}' " for src, dst in NORMALIZATION_RULES
+) + " WHEN NULLIF(LOWER(COALESCE(aisle, '')), '') IS NULL THEN NULL " + " ELSE 'Other' END"
+
+
+def _normalize(table: str) -> None:
+    op.execute(
+        f"CREATE TEMP TABLE {table}_aisle_backup AS "
+        f"SELECT id, aisle FROM {table} WHERE aisle IS NOT NULL"
+    )
+    op.execute(f"UPDATE {table} SET aisle = {CASE_EXPR} WHERE aisle IS NOT NULL")
+
+
+def upgrade() -> None:
+    bind = op.get_bind()
+    with op.batch_alter_table("ingredient") as batch:
+        pass
+    _normalize("ingredient")
+    _normalize("grocery_item")
+    bind.execute(
+        sa.text(
+            "SELECT set_config('app.aisle_backup_retention', 'aisle_migration_0015', false)"
+        )
+    )
+
+
+def downgrade() -> None:
+    # Best-effort downgrade: the backup temp tables only exist within the
+    # upgrade transaction. Restoring the pre-normalization state is not
+    # possible from this migration alone. Operators must restore from a
+    # database snapshot taken before upgrade.
+    raise NotImplementedError(
+        "Cannot reverse aisle normalization without an external backup. "
+        "Restore the database from a snapshot taken before 0015 was applied."
+    )