feat(views): Phase 5j slice A — paliad-shape schema redesign

Hard-replaces the 5i projax.views table per m's Q10 pick (2026-05-29): no real data to preserve after a few hours, and the shape changes are big enough that a clean recreate beats a 6-step ALTER. Schema (migration 0017_views_redesign.sql): - id (uuid), slug (text, format-CHECK'd, UNIQUE), name, icon, filter_json (jsonb — INCLUDES view_type per m's Q2), sort_field, sort_dir, group_by, sort_order, show_count, last_used_at, created_at, updated_at. - DROPPED: pinned, is_default_for, view_type column. m's Q9 picked MRU (last_used_at) over per-page-default; Q2 placed view_type inside filter_json so the JSON owns the canonical render spec. - Constraints: slug regex, sort_dir enum. NO view_type CHECK — the JSON-shape validator owns it now. - Indexes: slug UNIQUE, (sort_order, name), (last_used_at DESC). - updated_at trigger reused; projax_admin ownership preserved. Store (store/views.go rewrite): - View struct: Slug as the user-facing key; uuid kept on ID for the legacy `?view=<uuid>` 302-redirect path that lands in slice C. - ListViews ordered by sort_order, name (matches sidebar). - GetView(slug) + GetViewByID(uuid). MostRecentView() drives the /views landing redirect (slice B). - TouchView(slug) bumps last_used_at fire-and-forget. - ReorderViews([]slugs) wires the column for slice G's drag UI. - CreateView server-assigns sort_order = MAX+1 inside the tx. - UpdateView replaces every writeable field; renames are supported. - Validation: slug format regex + reserved-list rejection + filter_json JSON well-formed check before round-trip. - ErrViewNotFound / ErrViewSlugTaken / ErrViewSlugReserved / ErrViewSlugFormat surface to handlers as the typed error set. Cleanup of the 5i overlay (drops what the new shape obsoletes): - web/views.go: gutted to a stub. applySavedView, applyDefaultView, overlayURLFields, filterQueryToJSON, filterJSONToQuery, filterFromJSONPayload, anySliceToStrings + every old handler (handleViewsIndex, handleViewCreate, handleViewWrite, handleViewEdit, handleViewRedirect, handleViewDelete) deleted. - web/server.go: dropped the /views route registrations and the applySavedView + applyDefaultView calls in handleTree. DefaultBanner data-map field removed. - web/tree_filter.go: TreeFilter.ViewID field removed; ParseTreeFilter and QueryString stop reading/emitting ?view=. - web/templates/views.tmpl and view_edit.tmpl deleted. - web/templates/tree_section.tmpl: default-banner block deleted. - web/views_test.go: deleted (every test was against the 5i shape). Between slice A and slice B, /views/* URLs return 404 by design. Slice B reintroduces the route family in paliad-shape: GET /views → MRU landing GET /views/{slug} → render GET /views/new → editor GET /views/{slug}/edit → editor POST /views, /views/{slug}, /views/{slug}/delete → CRUD Tests (store/views_test.go, new): - TestViewSlugCRUD — create / get-by-slug / get-by-id / rename / delete round-trip, including rename-leaves-old-slug-gone. - TestViewSlugFormatRejected — uppercase, underscore, leading dash, length-cap, empty all surface ErrViewSlugFormat. - TestViewReservedSlugRejected — tree/dashboard/calendar/timeline/graph and friends all reject with ErrViewSlugReserved. - TestViewSlugCollision — duplicate slug surfaces ErrViewSlugTaken. - TestViewMRU — TouchView + MostRecentView ordering against a controlled pair of slugs (resilient to other suites' touched views). - TestViewReorder — ReorderViews rewrites sort_order ascending. Web tests stay green (the 5i overlay tests are gone, the rest don't touch the views shape).
2026-05-29 11:41:28 +02:00
parent 590bb28063
commit 173d7ddbb2
10 changed files with 590 additions and 1045 deletions
--- a/db/migrations/0017_views_redesign.sql
+++ b/db/migrations/0017_views_redesign.sql
@@ -0,0 +1,101 @@
+-- 0017_views_redesign.sql
+--
+-- Phase 5j Slice A: paliad-shape redesign of projax.views.
+--
+-- 5i (0016) modelled views as overlays on existing pages keyed by uuid.
+-- m's feedback: that's the wrong shape — views should be first-class
+-- pages at /views/{slug}, mirroring paliad's user_views model.
+--
+-- This migration HARD-REPLACES the 5i table. m's pick on Q10 (2026-05-29):
+-- hard-replace is fine because 5i was hours old with no persisted user
+-- data of value. Any rows present get dropped along with the table.
+--
+-- m's other picks worth marking inline:
+--   Q2 (2026-05-29): view_type lives INSIDE filter_json, not as a
+--                    top-level column with a CHECK constraint. Keeps the
+--                    schema lean — the renderer parses the JSON anyway.
+--   Q9 (2026-05-29): is_default_for column dropped entirely. MRU
+--                    (last_used_at) replaces the per-page-default model.
+--   Q11 (2026-05-29): graph stays outside the views enum; no graph
+--                    view_type ever lands in filter_json.
+
+DROP TABLE IF EXISTS projax.views CASCADE;
+
+CREATE TABLE projax.views (
+  id            uuid PRIMARY KEY DEFAULT gen_random_uuid(),
+
+  -- URL-routable identifier. Application-layer validator enforces the
+  -- regex `^[a-z0-9][a-z0-9-]{0,62}$` + a reserved-slug list (system
+  -- slugs + top-level route segments). Globally unique — single-user
+  -- v1; no user_id prefix.
+  slug          text NOT NULL,
+
+  -- Display name. Free-form; user picks whatever language they think in.
+  -- Rendered verbatim in the sidebar.
+  name          text NOT NULL,
+
+  -- Frontend icon-registry key. NULL → default folder glyph. Length cap
+  -- keeps stored value sane even if the registry is bypassed.
+  icon          text,
+
+  -- Canonical view definition. Includes view_type (per m's Q2 pick),
+  -- plus the standard TreeFilter dimensions (q, tags, management, …),
+  -- plus optional sort/group hints. Renderer parses the JSON; the DB
+  -- never has to look inside.
+  filter_json   jsonb NOT NULL DEFAULT '{}'::jsonb,
+
+  -- Sort + grouping hints used by the renderers (list/card/kanban).
+  -- Kept as top-level columns so the editor can index them quickly,
+  -- though they're conceptually part of the render spec.
+  sort_field    text,
+  sort_dir      text,
+  group_by      text,
+
+  -- Sidebar ordering. Server-assigned MAX+1 on create so two parallel
+  -- inserts don't collide. Drag-reorder UI lands in slice G; this
+  -- column is wired now so the data shape is stable.
+  sort_order    integer NOT NULL DEFAULT 0,
+
+  -- Opt-in count badge on the sidebar entry. Defaults false so casual
+  -- views don't pay the COUNT(*) cost.
+  show_count    boolean NOT NULL DEFAULT false,
+
+  -- MRU landing on /views — `handleViewsLanding` 302s here when set.
+  -- Touched fire-and-forget on every render.
+  last_used_at  timestamptz,
+
+  created_at    timestamptz NOT NULL DEFAULT now(),
+  updated_at    timestamptz NOT NULL DEFAULT now(),
+
+  CONSTRAINT views_sort_dir_chk
+    CHECK (sort_dir IS NULL OR sort_dir IN ('asc','desc')),
+  CONSTRAINT views_slug_format_chk
+    CHECK (slug ~ '^[a-z0-9][a-z0-9-]{0,62}$')
+);
+
+CREATE UNIQUE INDEX views_slug_uniq ON projax.views (slug);
+CREATE INDEX views_sort_order_idx ON projax.views (sort_order, name);
+CREATE INDEX views_last_used_idx ON projax.views (last_used_at DESC NULLS LAST);
+
+-- updated_at trigger. Re-created here (CREATE OR REPLACE on the function)
+-- because 0016 dropped with CASCADE above.
+CREATE OR REPLACE FUNCTION projax.views_touch_updated_at()
+  RETURNS trigger LANGUAGE plpgsql AS $$
+BEGIN
+  NEW.updated_at := now();
+  RETURN NEW;
+END;
+$$;
+
+DROP TRIGGER IF EXISTS views_touch_updated_at ON projax.views;
+CREATE TRIGGER views_touch_updated_at
+  BEFORE UPDATE ON projax.views
+  FOR EACH ROW EXECUTE FUNCTION projax.views_touch_updated_at();
+
+DO $own$ BEGIN
+  IF EXISTS (SELECT 1 FROM pg_roles WHERE rolname = 'projax_admin') THEN
+    EXECUTE 'ALTER TABLE projax.views OWNER TO projax_admin';
+    EXECUTE 'ALTER FUNCTION projax.views_touch_updated_at() OWNER TO projax_admin';
+    EXECUTE 'GRANT SELECT, INSERT, UPDATE, DELETE ON projax.views TO projax_admin';
+  END IF;
+END $own$;
--- a/store/views.go
+++ b/store/views.go
@@ -5,58 +5,108 @@ import (
 	"encoding/json"
 	"errors"
 	"fmt"
+	"regexp"
 	"strings"
 	"time"

 	"github.com/jackc/pgx/v5"
-	"github.com/jackc/pgx/v5/pgxpool"
 )

-// View is one row in projax.views. Phase 5i Slice D — saved views.
-//
-// FilterJSON carries the persisted filter state as raw JSON so callers can
-// freely round-trip into their TreeFilter or another future filter type
-// without forcing the store package to depend on web/.
+// View is one row in projax.views — a first-class /views/{slug} page.
+// Phase 5j paliad-shape: the slug is the user-facing key; URLs and the
+// sidebar both index by it. The uuid id stays because it's cheap and
+// surfaces in future MCP integrations, but it is NOT exposed in URLs.
 type View struct {
 	ID         string
+	Slug       string
 	Name       string
-	Description  string
-	FilterJSON   []byte // raw jsonb payload
-	ViewType     string
+	Icon       *string
+	FilterJSON []byte // raw jsonb payload — includes view_type per m's Q2
 	SortField  *string
 	SortDir    *string
 	GroupBy    *string
-	Pinned       bool
-	IsDefaultFor *string
+	SortOrder  int
+	ShowCount  bool
+	LastUsedAt *time.Time
 	CreatedAt  time.Time
 	UpdatedAt  time.Time
 }

-// ErrViewNotFound surfaces from GetView / SoftDeleteView when no row matches.
+// ErrViewNotFound surfaces from Get*/Update*/Delete when no row matches.
 var ErrViewNotFound = errors.New("view not found")

-// ViewInput is the writeable subset of View used by Create / Update.
+// ErrViewSlugTaken is returned by Create / Update when the slug already
+// belongs to another view. Web handlers map this to 409.
+var ErrViewSlugTaken = errors.New("view slug already exists")
+
+// ErrViewSlugReserved is returned when the caller picks a slug that
+// shadows a system slug or a top-level URL segment. Web handlers map
+// this to 400 with a friendly message.
+var ErrViewSlugReserved = errors.New("view slug is reserved")
+
+// ErrViewSlugFormat is returned when the slug doesn't match the format
+// regex. Same mapping as reserved.
+var ErrViewSlugFormat = errors.New("view slug must match ^[a-z0-9][a-z0-9-]{0,62}$")
+
+// slugRE is the format guard. Mirrors the SQL CHECK constraint so callers
+// get a friendly error before round-tripping to the DB.
+var slugRE = regexp.MustCompile(`^[a-z0-9][a-z0-9-]{0,62}$`)
+
+// reservedViewSlugs is the static list of slugs the validator rejects.
+// Combines system-view slugs (slice C wires them) with top-level route
+// segments the application owns.
+var reservedViewSlugs = map[string]struct{}{
+	// System views (slice C):
+	"tree": {}, "dashboard": {}, "calendar": {}, "timeline": {}, "graph": {},
+	// /views sub-routes:
+	"new": {}, "edit": {},
+	// Top-level application URLs:
+	"admin": {}, "login": {}, "logout": {}, "healthz": {}, "mcp": {},
+	"static": {}, "i": {}, "views": {},
+}
+
+// IsReservedViewSlug reports whether the slug shadows a system slug or a
+// top-level URL segment. Exported for the editor's slug-derivation
+// helper.
+func IsReservedViewSlug(slug string) bool {
+	_, ok := reservedViewSlugs[strings.ToLower(slug)]
+	return ok
+}
+
+// ValidateSlug runs format + reserved checks. Returns nil for valid slugs.
+func ValidateSlug(slug string) error {
+	if !slugRE.MatchString(slug) {
+		return ErrViewSlugFormat
+	}
+	if IsReservedViewSlug(slug) {
+		return ErrViewSlugReserved
+	}
+	return nil
+}
+
+// ViewInput is the writeable subset for Create / Update. Defaults
+// applied: nil FilterJSON → {}; SortOrder is server-assigned on Create.
 type ViewInput struct {
+	Slug       string
 	Name       string
-	Description  string
+	Icon       *string
 	FilterJSON []byte
-	ViewType     string
 	SortField  string
 	SortDir    string
 	GroupBy    string
-	Pinned       bool
-	IsDefaultFor string // "" → clear default
+	ShowCount  bool
 }

-// ListViews returns every non-deleted view ordered by pinned-first, then name.
+// ListViews returns every view ordered by sort_order ASC then name —
+// matches the sidebar rendering order.
 func (s *Store) ListViews(ctx context.Context) ([]*View, error) {
 	rows, err := s.Pool.Query(ctx, `
-SELECT id, name, coalesce(description,''), filter_json, view_type,
-       sort_field, sort_dir, group_by, pinned, is_default_for,
+SELECT id, slug, name, icon, filter_json,
+       sort_field, sort_dir, group_by,
+       sort_order, show_count, last_used_at,
       created_at, updated_at
 FROM projax.views
-WHERE deleted_at IS NULL
-ORDER BY pinned DESC, lower(name) ASC`)
+ORDER BY sort_order ASC, name ASC`)
 	if err != nil {
 		return nil, fmt.Errorf("list views: %w", err)
 	}
@@ -72,14 +122,25 @@ ORDER BY pinned DESC, lower(name) ASC`)
 	return out, rows.Err()
 }

-// GetView returns one view by id. ErrViewNotFound when missing or soft-deleted.
-func (s *Store) GetView(ctx context.Context, id string) (*View, error) {
+// GetView returns one view by slug. ErrViewNotFound when missing.
+func (s *Store) GetView(ctx context.Context, slug string) (*View, error) {
+	return s.getView(ctx, `slug = $1`, slug)
+}
+
+// GetViewByID returns one view by uuid id. Used by the legacy
+// `?view=<uuid>` 302-redirect path during the 5i → 5j cutover.
+func (s *Store) GetViewByID(ctx context.Context, id string) (*View, error) {
+	return s.getView(ctx, `id = $1`, id)
+}
+
+func (s *Store) getView(ctx context.Context, where, arg string) (*View, error) {
 	row := s.Pool.QueryRow(ctx, `
-SELECT id, name, coalesce(description,''), filter_json, view_type,
-       sort_field, sort_dir, group_by, pinned, is_default_for,
+SELECT id, slug, name, icon, filter_json,
+       sort_field, sort_dir, group_by,
+       sort_order, show_count, last_used_at,
       created_at, updated_at
 FROM projax.views
-WHERE id = $1 AND deleted_at IS NULL`, id)
+WHERE `+where, arg)
 	v, err := scanView(row)
 	if errors.Is(err, pgx.ErrNoRows) {
 		return nil, ErrViewNotFound
@@ -87,9 +148,29 @@ WHERE id = $1 AND deleted_at IS NULL`, id)
 	return v, err
 }

-// CreateView inserts a row. When IsDefaultFor is set, the prior default for
-// that page is cleared in the same transaction so the partial unique index
-// can't fire after a Postgres rewrite.
+// MostRecentView returns the view with the most recent last_used_at. nil
+// when no view has been touched yet (or none exist). Drives the /views
+// landing redirect.
+func (s *Store) MostRecentView(ctx context.Context) (*View, error) {
+	row := s.Pool.QueryRow(ctx, `
+SELECT id, slug, name, icon, filter_json,
+       sort_field, sort_dir, group_by,
+       sort_order, show_count, last_used_at,
+       created_at, updated_at
+FROM projax.views
+WHERE last_used_at IS NOT NULL
+ORDER BY last_used_at DESC
+LIMIT 1`)
+	v, err := scanView(row)
+	if errors.Is(err, pgx.ErrNoRows) {
+		return nil, nil
+	}
+	return v, err
+}
+
+// CreateView inserts a new view. SortOrder is server-assigned to
+// MAX(existing)+1 inside the same tx so two parallel creates don't
+// collide on the index.
 func (s *Store) CreateView(ctx context.Context, in ViewInput) (*View, error) {
 	if err := validateViewInput(in); err != nil {
 		return nil, err
@@ -97,95 +178,81 @@ func (s *Store) CreateView(ctx context.Context, in ViewInput) (*View, error) {
 	if in.FilterJSON == nil {
 		in.FilterJSON = []byte("{}")
 	}
-	var id string
 	tx, err := s.Pool.BeginTx(ctx, pgx.TxOptions{})
 	if err != nil {
 		return nil, fmt.Errorf("begin: %w", err)
 	}
 	defer func() { _ = tx.Rollback(ctx) }()
-	if in.IsDefaultFor != "" {
-		if _, err := tx.Exec(ctx, `
-UPDATE projax.views
-SET is_default_for = NULL
-WHERE is_default_for = $1 AND deleted_at IS NULL`, in.IsDefaultFor); err != nil {
-			return nil, fmt.Errorf("clear prior default: %w", err)
-		}
+	var nextOrder int
+	if err := tx.QueryRow(ctx,
+		`SELECT COALESCE(MAX(sort_order), -1) + 1 FROM projax.views`,
+	).Scan(&nextOrder); err != nil {
+		return nil, fmt.Errorf("compute next sort_order: %w", err)
 	}
+	var id string
 	err = tx.QueryRow(ctx, `
 INSERT INTO projax.views
-  (name, description, filter_json, view_type, sort_field, sort_dir, group_by, pinned, is_default_for)
+  (slug, name, icon, filter_json, sort_field, sort_dir, group_by, sort_order, show_count)
 VALUES
-  ($1, NULLIF($2,''), $3::jsonb, $4, NULLIF($5,''), NULLIF($6,''), NULLIF($7,''), $8, NULLIF($9,''))
+  ($1, $2, $3, $4::jsonb, NULLIF($5,''), NULLIF($6,''), NULLIF($7,''), $8, $9)
 RETURNING id`,
-		in.Name, in.Description, in.FilterJSON, in.ViewType,
-		in.SortField, in.SortDir, in.GroupBy, in.Pinned, in.IsDefaultFor,
+		in.Slug, in.Name, in.Icon, in.FilterJSON,
+		in.SortField, in.SortDir, in.GroupBy, nextOrder, in.ShowCount,
 	).Scan(&id)
 	if err != nil {
+		if isUniqueSlugViolation(err) {
+			return nil, ErrViewSlugTaken
+		}
 		return nil, fmt.Errorf("insert view: %w", err)
 	}
 	if err := tx.Commit(ctx); err != nil {
 		return nil, fmt.Errorf("commit: %w", err)
 	}
-	return s.GetView(ctx, id)
+	return s.GetView(ctx, in.Slug)
 }

-// UpdateView replaces every writeable field. Same default-clearing semantics
-// as CreateView.
-func (s *Store) UpdateView(ctx context.Context, id string, in ViewInput) (*View, error) {
+// UpdateView replaces every writeable field on the row matching `slug`.
+// To rename, pass the desired new slug in `in.Slug`; if it collides with
+// another row, ErrViewSlugTaken surfaces.
+func (s *Store) UpdateView(ctx context.Context, slug string, in ViewInput) (*View, error) {
 	if err := validateViewInput(in); err != nil {
 		return nil, err
 	}
 	if in.FilterJSON == nil {
 		in.FilterJSON = []byte("{}")
 	}
-	tx, err := s.Pool.BeginTx(ctx, pgx.TxOptions{})
-	if err != nil {
-		return nil, fmt.Errorf("begin: %w", err)
-	}
-	defer func() { _ = tx.Rollback(ctx) }()
-	if in.IsDefaultFor != "" {
-		if _, err := tx.Exec(ctx, `
+	tag, err := s.Pool.Exec(ctx, `
 UPDATE projax.views
-SET is_default_for = NULL
-WHERE is_default_for = $1 AND id <> $2 AND deleted_at IS NULL`,
-			in.IsDefaultFor, id); err != nil {
-			return nil, fmt.Errorf("clear prior default: %w", err)
-		}
-	}
-	tag, err := tx.Exec(ctx, `
-UPDATE projax.views
-SET name           = $2,
-    description    = NULLIF($3,''),
-    filter_json    = $4::jsonb,
-    view_type      = $5,
+SET slug        = $2,
+    name        = $3,
+    icon        = $4,
+    filter_json = $5::jsonb,
    sort_field  = NULLIF($6,''),
    sort_dir    = NULLIF($7,''),
    group_by    = NULLIF($8,''),
-    pinned         = $9,
-    is_default_for = NULLIF($10,'')
-WHERE id = $1 AND deleted_at IS NULL`,
-		id, in.Name, in.Description, in.FilterJSON, in.ViewType,
-		in.SortField, in.SortDir, in.GroupBy, in.Pinned, in.IsDefaultFor,
+    show_count  = $9
+WHERE slug = $1`,
+		slug, in.Slug, in.Name, in.Icon, in.FilterJSON,
+		in.SortField, in.SortDir, in.GroupBy, in.ShowCount,
 	)
 	if err != nil {
+		if isUniqueSlugViolation(err) {
+			return nil, ErrViewSlugTaken
+		}
 		return nil, fmt.Errorf("update view: %w", err)
 	}
 	if tag.RowsAffected() == 0 {
 		return nil, ErrViewNotFound
 	}
-	if err := tx.Commit(ctx); err != nil {
-		return nil, fmt.Errorf("commit: %w", err)
-	}
-	return s.GetView(ctx, id)
+	return s.GetView(ctx, in.Slug)
 }

-// SoftDeleteView sets deleted_at on the row. Idempotent (returns ErrViewNotFound
-// only when the row never existed; subsequent calls on a soft-deleted row
-// silently succeed since deleted_at is just refreshed).
-func (s *Store) SoftDeleteView(ctx context.Context, id string) error {
-	tag, err := s.Pool.Exec(ctx, `
-UPDATE projax.views SET deleted_at = now()
-WHERE id = $1`, id)
+// DeleteView removes a view by slug. Hard delete (no soft-delete column
+// in the redesign — single-user, no audit obligation). Idempotent only
+// on the second call; first call against a non-existent row returns
+// ErrViewNotFound.
+func (s *Store) DeleteView(ctx context.Context, slug string) error {
+	tag, err := s.Pool.Exec(ctx, `DELETE FROM projax.views WHERE slug = $1`, slug)
 	if err != nil {
 		return fmt.Errorf("delete view: %w", err)
 	}
@@ -195,79 +262,100 @@ WHERE id = $1`, id)
 	return nil
 }

-// DefaultViewFor returns the view that should auto-apply on the named page,
-// or nil if none is set.
-func (s *Store) DefaultViewFor(ctx context.Context, page string) (*View, error) {
-	row := s.Pool.QueryRow(ctx, `
-SELECT id, name, coalesce(description,''), filter_json, view_type,
-       sort_field, sort_dir, group_by, pinned, is_default_for,
-       created_at, updated_at
-FROM projax.views
-WHERE is_default_for = $1 AND deleted_at IS NULL
-LIMIT 1`, page)
-	v, err := scanView(row)
-	if errors.Is(err, pgx.ErrNoRows) {
-		return nil, nil
+// TouchView bumps last_used_at to now(). Fire-and-forget from the render
+// handler — failures are logged but never block the page.
+func (s *Store) TouchView(ctx context.Context, slug string) error {
+	tag, err := s.Pool.Exec(ctx,
+		`UPDATE projax.views SET last_used_at = now() WHERE slug = $1`, slug)
+	if err != nil {
+		return fmt.Errorf("touch view: %w", err)
 	}
-	return v, err
+	if tag.RowsAffected() == 0 {
+		return ErrViewNotFound
+	}
+	return nil
 }

-// validateViewInput runs the Go-side guards. The DB CHECK constraints provide
-// the durable contract; these checks let handlers surface a friendlier error.
+// ReorderViews applies a sort_order rewrite where the provided slugs map
+// to ascending sort_order values starting at 0. Slugs not present in the
+// input keep their existing sort_order. Drives slice G's drag-reorder UI.
+func (s *Store) ReorderViews(ctx context.Context, slugs []string) error {
+	if len(slugs) == 0 {
+		return nil
+	}
+	tx, err := s.Pool.BeginTx(ctx, pgx.TxOptions{})
+	if err != nil {
+		return fmt.Errorf("begin: %w", err)
+	}
+	defer func() { _ = tx.Rollback(ctx) }()
+	for i, slug := range slugs {
+		if _, err := tx.Exec(ctx,
+			`UPDATE projax.views SET sort_order = $1 WHERE slug = $2`,
+			i, slug,
+		); err != nil {
+			return fmt.Errorf("reorder %q: %w", slug, err)
+		}
+	}
+	return tx.Commit(ctx)
+}
+
+// validateViewInput runs Go-side guards. The DB CHECK constraints are the
+// durable contract; these checks let handlers surface friendlier errors.
 func validateViewInput(in ViewInput) error {
+	if err := ValidateSlug(in.Slug); err != nil {
+		return err
+	}
 	if strings.TrimSpace(in.Name) == "" {
 		return errors.New("view name is required")
 	}
-	switch in.ViewType {
-	case "card", "list", "calendar", "kanban", "timeline":
-	default:
-		return fmt.Errorf("invalid view_type %q (allowed: card list calendar kanban timeline)", in.ViewType)
-	}
 	if in.SortDir != "" && in.SortDir != "asc" && in.SortDir != "desc" {
 		return fmt.Errorf("invalid sort_dir %q", in.SortDir)
 	}
-	if in.ViewType == "kanban" && strings.TrimSpace(in.GroupBy) == "" {
-		return errors.New("kanban view_type requires group_by")
-	}
-	if in.IsDefaultFor != "" {
-		switch in.IsDefaultFor {
-		case "tree", "dashboard", "calendar", "timeline":
-		default:
-			return fmt.Errorf("invalid is_default_for %q", in.IsDefaultFor)
-		}
+	if in.Icon != nil && len(*in.Icon) > 64 {
+		return errors.New("icon key exceeds 64 characters")
 	}
 	if len(in.FilterJSON) > 0 {
-		var dummy any
-		if err := json.Unmarshal(in.FilterJSON, &dummy); err != nil {
+		var probe any
+		if err := json.Unmarshal(in.FilterJSON, &probe); err != nil {
 			return fmt.Errorf("filter_json is not valid JSON: %w", err)
 		}
 	}
 	return nil
 }

+// isUniqueSlugViolation matches the postgres unique_violation SQLSTATE
+// (23505) on the views_slug_uniq index. We don't import pgconn here to
+// avoid widening the package's dep surface; substring match on the
+// pgx-formatted error covers both the wire-level codes pgx surfaces.
+func isUniqueSlugViolation(err error) bool {
+	if err == nil {
+		return false
+	}
+	s := err.Error()
+	return strings.Contains(s, "views_slug_uniq") ||
+		(strings.Contains(s, "SQLSTATE 23505") && strings.Contains(s, "slug"))
+}
+
 type viewScanner interface {
 	Scan(dest ...any) error
 }

 func scanView(s viewScanner) (*View, error) {
 	v := &View{}
-	var sortField, sortDir, groupBy, isDefaultFor *string
+	var icon, sortField, sortDir, groupBy *string
+	var lastUsedAt *time.Time
 	if err := s.Scan(
-		&v.ID, &v.Name, &v.Description, &v.FilterJSON, &v.ViewType,
-		&sortField, &sortDir, &groupBy, &v.Pinned, &isDefaultFor,
+		&v.ID, &v.Slug, &v.Name, &icon, &v.FilterJSON,
+		&sortField, &sortDir, &groupBy,
+		&v.SortOrder, &v.ShowCount, &lastUsedAt,
 		&v.CreatedAt, &v.UpdatedAt,
 	); err != nil {
 		return nil, err
 	}
+	v.Icon = icon
 	v.SortField = sortField
 	v.SortDir = sortDir
 	v.GroupBy = groupBy
-	v.IsDefaultFor = isDefaultFor
+	v.LastUsedAt = lastUsedAt
 	return v, nil
 }
-
-// pgxRowsCompat keeps the linter quiet about importing pgxpool only for
-// type assertions inside views.go. The Pool method on Store already pulls
-// pgxpool into the package; nothing to do here, but the unused-import
-// shadow doesn't bite.
-var _ = pgxpool.Pool{}
--- a/store/views_test.go
+++ b/store/views_test.go
@@ -0,0 +1,246 @@
+package store_test
+
+import (
+	"context"
+	"errors"
+	"os"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"github.com/m/projax/store"
+)
+
+// connect mirrors db_test's connect helper. The store package owns its own
+// integration tests (Phase 5j Slice A introduced this file alongside the
+// schema redesign); it shares the same env-var convention to skip when no
+// DB is wired up.
+func connect(t *testing.T) (*pgxpool.Pool, *store.Store) {
+	t.Helper()
+	url := os.Getenv("PROJAX_DB_URL")
+	if url == "" {
+		url = os.Getenv("SUPABASE_DATABASE_URL")
+	}
+	if url == "" {
+		t.Skip("no PROJAX_DB_URL / SUPABASE_DATABASE_URL set — skipping integration test")
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	defer cancel()
+	pool, err := pgxpool.New(ctx, url)
+	if err != nil {
+		t.Fatalf("pool: %v", err)
+	}
+	if err := pool.Ping(ctx); err != nil {
+		t.Skipf("DB unreachable: %v", err)
+	}
+	return pool, store.New(pool)
+}
+
+// uniqueSlug suffixes a base slug with a timestamp so parallel test runs
+// don't collide on the views_slug_uniq index.
+func uniqueSlug(prefix string) string {
+	return prefix + "-" + strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
+}
+
+func TestViewSlugCRUD(t *testing.T) {
+	pool, s := connect(t)
+	defer pool.Close()
+	ctx := context.Background()
+	slug := uniqueSlug("p5j-a-crud")
+	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug LIKE 'p5j-a-crud-%' OR slug LIKE 'p5j-a-renamed-%'`)
+
+	// Create.
+	created, err := s.CreateView(ctx, store.ViewInput{
+		Slug:       slug,
+		Name:       "Slice A CRUD",
+		FilterJSON: []byte(`{"view_type":"list","tags":["work"]}`),
+	})
+	if err != nil {
+		t.Fatalf("create: %v", err)
+	}
+	if created.Slug != slug {
+		t.Errorf("slug = %q, want %q", created.Slug, slug)
+	}
+	if created.ID == "" {
+		t.Error("ID should be populated on create")
+	}
+	if created.SortOrder < 0 {
+		t.Errorf("sort_order should be >= 0 (server-assigned), got %d", created.SortOrder)
+	}
+
+	// GetView by slug.
+	got, err := s.GetView(ctx, slug)
+	if err != nil {
+		t.Fatalf("get: %v", err)
+	}
+	if string(got.FilterJSON) != `{"view_type": "list", "tags": ["work"]}` && string(got.FilterJSON) != `{"tags": ["work"], "view_type": "list"}` {
+		// Postgres jsonb normalises key order — accept either ordering.
+		// Verify it round-trips structurally.
+		if !strings.Contains(string(got.FilterJSON), `"view_type"`) || !strings.Contains(string(got.FilterJSON), `"tags"`) {
+			t.Errorf("filter_json did not round-trip view_type+tags: %s", got.FilterJSON)
+		}
+	}
+
+	// GetViewByID (legacy 5i 302-redirect path uses this).
+	byID, err := s.GetViewByID(ctx, created.ID)
+	if err != nil {
+		t.Fatalf("get by id: %v", err)
+	}
+	if byID.Slug != slug {
+		t.Errorf("by-id lookup returned wrong slug: %q", byID.Slug)
+	}
+
+	// Update — rename slug + change filter.
+	renamed := uniqueSlug("p5j-a-renamed")
+	updated, err := s.UpdateView(ctx, slug, store.ViewInput{
+		Slug:       renamed,
+		Name:       "Renamed",
+		FilterJSON: []byte(`{"view_type":"card"}`),
+	})
+	if err != nil {
+		t.Fatalf("update: %v", err)
+	}
+	if updated.Slug != renamed {
+		t.Errorf("renamed slug = %q, want %q", updated.Slug, renamed)
+	}
+	if _, err := s.GetView(ctx, slug); !errors.Is(err, store.ErrViewNotFound) {
+		t.Errorf("old slug should be ErrViewNotFound after rename, got %v", err)
+	}
+
+	// Delete.
+	if err := s.DeleteView(ctx, renamed); err != nil {
+		t.Fatalf("delete: %v", err)
+	}
+	if _, err := s.GetView(ctx, renamed); !errors.Is(err, store.ErrViewNotFound) {
+		t.Errorf("post-delete get should be ErrViewNotFound, got %v", err)
+	}
+	if err := s.DeleteView(ctx, renamed); !errors.Is(err, store.ErrViewNotFound) {
+		t.Errorf("second delete should be ErrViewNotFound, got %v", err)
+	}
+}
+
+func TestViewSlugFormatRejected(t *testing.T) {
+	pool, s := connect(t)
+	defer pool.Close()
+	ctx := context.Background()
+	bad := []string{
+		"",                                                                   // empty
+		"UPPER",                                                              // uppercase
+		"under_score",                                                        // underscore
+		"-leading-dash",                                                      // leading dash
+		"a." + strings.Repeat("x", 100),                                      // too long + invalid char
+		strings.Repeat("a", 64),                                              // length cap is 63 (1 + 62)
+	}
+	for _, slug := range bad {
+		_, err := s.CreateView(ctx, store.ViewInput{
+			Slug: slug, Name: "x", FilterJSON: []byte(`{}`),
+		})
+		if !errors.Is(err, store.ErrViewSlugFormat) {
+			t.Errorf("slug=%q expected ErrViewSlugFormat, got %v", slug, err)
+		}
+	}
+}
+
+func TestViewReservedSlugRejected(t *testing.T) {
+	_, s := connect(t)
+	ctx := context.Background()
+	for _, slug := range []string{"tree", "dashboard", "calendar", "timeline", "graph", "new", "edit", "admin", "views"} {
+		_, err := s.CreateView(ctx, store.ViewInput{
+			Slug: slug, Name: "x", FilterJSON: []byte(`{}`),
+		})
+		if !errors.Is(err, store.ErrViewSlugReserved) {
+			t.Errorf("reserved slug %q should be rejected, got %v", slug, err)
+		}
+	}
+}
+
+func TestViewSlugCollision(t *testing.T) {
+	pool, s := connect(t)
+	defer pool.Close()
+	ctx := context.Background()
+	slug := uniqueSlug("p5j-a-collision")
+	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug = $1`, slug)
+
+	if _, err := s.CreateView(ctx, store.ViewInput{Slug: slug, Name: "First"}); err != nil {
+		t.Fatalf("first create: %v", err)
+	}
+	if _, err := s.CreateView(ctx, store.ViewInput{Slug: slug, Name: "Second"}); !errors.Is(err, store.ErrViewSlugTaken) {
+		t.Errorf("duplicate slug should be ErrViewSlugTaken, got %v", err)
+	}
+}
+
+func TestViewMRU(t *testing.T) {
+	pool, s := connect(t)
+	defer pool.Close()
+	ctx := context.Background()
+	a := uniqueSlug("p5j-a-mru-a")
+	b := uniqueSlug("p5j-a-mru-b")
+	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug IN ($1, $2)`, a, b)
+
+	if _, err := s.CreateView(ctx, store.ViewInput{Slug: a, Name: "A"}); err != nil {
+		t.Fatalf("create a: %v", err)
+	}
+	if _, err := s.CreateView(ctx, store.ViewInput{Slug: b, Name: "B"}); err != nil {
+		t.Fatalf("create b: %v", err)
+	}
+
+	// MostRecentView with no touches yet — when no view in the table has
+	// last_used_at set, MRU returns nil. (Other tests may have left their
+	// own touched views, so we only assert on the slugs we control.)
+	if err := s.TouchView(ctx, a); err != nil {
+		t.Fatalf("touch a: %v", err)
+	}
+	time.Sleep(20 * time.Millisecond)
+	if err := s.TouchView(ctx, b); err != nil {
+		t.Fatalf("touch b: %v", err)
+	}
+
+	mru, err := s.MostRecentView(ctx)
+	if err != nil {
+		t.Fatalf("mru: %v", err)
+	}
+	// Other tests' touched views may rank higher; we only assert that
+	// when MRU is one of OURS, the most-recently-touched (b) wins over a.
+	// To guarantee this test's signal even with contention from other
+	// suites, check b's last_used_at > a's last_used_at directly.
+	aV, _ := s.GetView(ctx, a)
+	bV, _ := s.GetView(ctx, b)
+	if aV.LastUsedAt == nil || bV.LastUsedAt == nil {
+		t.Fatal("both views should have last_used_at after touch")
+	}
+	if !bV.LastUsedAt.After(*aV.LastUsedAt) {
+		t.Errorf("b.last_used_at should be after a.last_used_at; a=%v b=%v", aV.LastUsedAt, bV.LastUsedAt)
+	}
+	if mru == nil {
+		t.Error("MostRecentView returned nil even though touches landed")
+	}
+}
+
+func TestViewReorder(t *testing.T) {
+	pool, s := connect(t)
+	defer pool.Close()
+	ctx := context.Background()
+	a := uniqueSlug("p5j-a-reorder-a")
+	b := uniqueSlug("p5j-a-reorder-b")
+	c := uniqueSlug("p5j-a-reorder-c")
+	defer pool.Exec(context.Background(), `DELETE FROM projax.views WHERE slug IN ($1, $2, $3)`, a, b, c)
+
+	for _, slug := range []string{a, b, c} {
+		if _, err := s.CreateView(ctx, store.ViewInput{Slug: slug, Name: slug}); err != nil {
+			t.Fatalf("create %s: %v", slug, err)
+		}
+	}
+	// Reorder c → b → a.
+	if err := s.ReorderViews(ctx, []string{c, b, a}); err != nil {
+		t.Fatalf("reorder: %v", err)
+	}
+	cV, _ := s.GetView(ctx, c)
+	bV, _ := s.GetView(ctx, b)
+	aV, _ := s.GetView(ctx, a)
+	if cV.SortOrder != 0 || bV.SortOrder != 1 || aV.SortOrder != 2 {
+		t.Errorf("reorder yielded sort_orders c=%d b=%d a=%d, want 0,1,2",
+			cV.SortOrder, bV.SortOrder, aV.SortOrder)
+	}
+}
--- a/web/server.go
+++ b/web/server.go
@@ -151,7 +151,7 @@ func New(s *store.Store, logger *slog.Logger) (*Server, error) {
 		},
 	}
 	pages := map[string]*template.Template{}
-	for _, name := range []string{"new", "classify", "caldav_admin", "caldav_disabled", "error", "views", "view_edit"} {
+	for _, name := range []string{"new", "classify", "caldav_admin", "caldav_disabled", "error"} {
 		t, err := template.New(name).Funcs(funcs).ParseFS(templatesFS,
 			"templates/layout.tmpl",
 			"templates/"+name+".tmpl",
@@ -382,11 +382,9 @@ func (s *Server) Routes() http.Handler {
 	mux.HandleFunc("GET /admin/caldav", s.handleCalDAVAdmin)
 	mux.HandleFunc("POST /admin/caldav/link", s.handleCalDAVLink)
 	mux.HandleFunc("POST /admin/caldav/unlink", s.handleCalDAVUnlink)
-	mux.HandleFunc("GET /views", s.handleViewsIndex)
-	mux.HandleFunc("POST /views", s.handleViewCreate)
-	mux.HandleFunc("GET /views/{id}/edit", s.handleViewEdit)
-	mux.HandleFunc("GET /views/", s.handleViewRedirect)
-	mux.HandleFunc("POST /views/", s.handleViewWrite)
+	// /views routes land in slice B (paliad-shape: GET /views, GET
+	// /views/{slug}, GET /views/new, GET /views/{slug}/edit, plus POST CRUD).
+	// Between slice A and slice B these URLs 404 by design.
 	mux.HandleFunc("GET /login", s.handleLoginForm)
 	mux.HandleFunc("POST /login", s.handleLoginSubmit)
 	mux.HandleFunc("POST /logout", s.handleLogout)
@@ -451,30 +449,11 @@ func (s *Server) handleTree(w http.ResponseWriter, r *http.Request) {
 	filter := ParseTreeFilter(r.URL.Query())
 	viewSet := PageViewTypes("/")
 	view := ParseViewType(r.URL.Query(), viewSet)
-	var defaultBanner *store.View
-	// Phase 5i Slice D: ?view=<uuid> resolves a saved view's filter +
-	// view_type into the current request, overriding URL-only chip state.
-	// Resolution failure (deleted view, malformed payload) is logged and
-	// silently falls back to the URL-derived filter — the page stays
-	// renderable rather than 500ing.
-	if saved, err := s.applySavedView(r, &filter, &view); err == nil && saved != nil {
-		// Re-validate view_type against the route catalog so a saved
-		// kanban-view URL opened on / (before slice C ships kanban) lands on
-		// the default with the chip showing the wanted view as locked.
-		view = viewSet.Resolve(view)
-	} else if err != nil {
-		s.Logger.Warn("applySavedView", "id", r.URL.Query().Get("view"), "err", err)
-	} else {
-		// Phase 5i Slice E: no explicit ?view= → check for a page default.
-		// applyDefaultView returns nil unless the URL is "clean" (no chip
-		// state) AND a default exists for this page.
-		if def, err := s.applyDefaultView(r, "tree", &filter, &view); err == nil && def != nil {
-			view = viewSet.Resolve(view)
-			defaultBanner = def
-		} else if err != nil {
-			s.Logger.Warn("applyDefaultView", "page", "tree", "err", err)
-		}
-	}
+	// Phase 5j: ?view= overlay + is_default_for resolution deleted with the
+	// 5i shape. /views/{slug} (slice B+) renders saved views as their own
+	// pages; legacy ?view=<uuid> URLs are 302-redirected from a dedicated
+	// handler (slice C). handleTree stays focused on the tree-as-tree
+	// surface and no longer hijacks itself based on a query param.
 	roots, orphans, total, orphanN, matched := applyTreeFilter(items, filter, linkKinds)
 	counts := computeChipCounts(items, filter, linkKinds, tags)
 	// Phase 5i Slice B: the card view renders a flat grid of matched items
@@ -504,7 +483,6 @@ func (s *Server) handleTree(w http.ResponseWriter, r *http.Request) {
 		"Kanban":            kanban,
 		"GroupBy":           groupBy,
 		"GroupByChips":      groupByChips,
-		"DefaultBanner":     defaultBanner,
 		// ActiveTags kept for backwards-compat with the old template path; removed
 		// after the template migrates fully.
 		"ActiveTags": filter.Tags,
--- a/web/templates/tree_section.tmpl
+++ b/web/templates/tree_section.tmpl
@@ -1,12 +1,5 @@
 {{define "tree-section"}}
 <section id="tree-section" class="tree-section">
-  {{if .DefaultBanner}}
-    <p class="default-banner muted">
-      Showing default view: <strong>{{.DefaultBanner.Name}}</strong> ·
-      <a href="/?nodefault=1"
-         hx-get="/?nodefault=1" hx-target="#tree-section" hx-swap="outerHTML" hx-push-url="true">clear</a>
-    </p>
-  {{end}}
  <p class="counts">
    <strong>{{.Matched}}</strong> / <strong>{{.Total}}</strong> items match
    {{if .OrphanN}} · <strong>{{.OrphanN}}</strong> unclassified mai-managed roots <a href="/admin/classify">→ classify</a>{{end}}
--- a/web/templates/view_edit.tmpl
+++ b/web/templates/view_edit.tmpl
@@ -1,42 +0,0 @@
-{{define "content"}}
-<h1>Edit view</h1>
-<p class="muted"><a href="/views">← back to views</a></p>
-
-<section class="views-create">
-  <form method="post" action="/views/{{.View.ID}}">
-    <label>Name <input type="text" name="name" required maxlength="80" value="{{.View.Name}}"></label>
-    <label>Description <input type="text" name="description" maxlength="200" value="{{.View.Description}}"></label>
-    <label>View type
-      <select name="view_type" required>
-        {{$cur := .View.ViewType}}
-        {{range .AllViewTypes}}<option value="{{.}}"{{if eq . $cur}} selected{{end}}>{{.}}</option>{{end}}
-      </select>
-    </label>
-    <label>Default for
-      <select name="is_default_for">
-        {{$d := deref .View.IsDefaultFor}}
-        {{range .DefaultForOptions}}<option value="{{.}}"{{if eq . $d}} selected{{end}}>{{if eq . ""}}—{{else}}{{.}}{{end}}</option>{{end}}
-      </select>
-    </label>
-    <label>Group by
-      <select name="group_by">
-        {{$g := deref .View.GroupBy}}
-        {{range .GroupByOptions}}<option value="{{.}}"{{if eq . $g}} selected{{end}}>{{if eq . ""}}—{{else}}{{.}}{{end}}</option>{{end}}
-      </select>
-    </label>
-    <label>Sort field <input type="text" name="sort_field" placeholder="title / updated_at / start_time" maxlength="40" value="{{deref .View.SortField}}"></label>
-    <label>Sort dir
-      <select name="sort_dir">
-        {{$sd := deref .View.SortDir}}
-        {{range .SortDirOptions}}<option value="{{.}}"{{if eq . $sd}} selected{{end}}>{{if eq . ""}}—{{else}}{{.}}{{end}}</option>{{end}}
-      </select>
-    </label>
-    <label><input type="checkbox" name="pinned" value="1"{{if .View.Pinned}} checked{{end}}> Pinned</label>
-    <label>Filter (URL query form)
-      <input type="text" name="filter_query" placeholder="tag=work&mgmt=mai" value="{{.FilterQuery}}">
-    </label>
-    <button type="submit">Save changes</button>
-    <a class="muted" href="/views">cancel</a>
-  </form>
-</section>
-{{end}}
--- a/web/templates/views.tmpl
+++ b/web/templates/views.tmpl
@@ -1,70 +0,0 @@
-{{define "content"}}
-<h1>Views</h1>
-
-<p class="muted">Saved bundles of (filter + view_type + sort + group_by). Page-agnostic — open one to render the saved set on the matching page.</p>
-
-<section class="views-list">
-  {{if .Views}}
-  <table>
-    <thead>
-      <tr>
-        <th>★</th><th>Name</th><th>Type</th><th>Default for</th><th>Group by</th><th></th>
-      </tr>
-    </thead>
-    <tbody>
-      {{range .Views}}
-      <tr>
-        <td>{{if .Pinned}}★{{end}}</td>
-        <td><a href="/views/{{.ID}}">{{.Name}}</a>{{if .Description}}<br><small class="muted">{{.Description}}</small>{{end}}</td>
-        <td>{{.ViewType}}</td>
-        <td>{{if .IsDefaultFor}}{{deref .IsDefaultFor}}{{else}}<span class="muted">—</span>{{end}}</td>
-        <td>{{if .GroupBy}}{{deref .GroupBy}}{{else}}<span class="muted">—</span>{{end}}</td>
-        <td>
-          <a href="/views/{{.ID}}/edit">edit</a>
-          <form method="post" action="/views/{{.ID}}/delete" style="display:inline">
-            <button type="submit" class="link-button" onclick="return confirm('Delete view {{.Name}}?')">delete</button>
-          </form>
-        </td>
-      </tr>
-      {{end}}
-    </tbody>
-  </table>
-  {{else}}
-  <p class="empty muted"><em>No saved views yet. Create one with the form below or via the "Save view…" link on any Views-supporting page.</em></p>
-  {{end}}
-</section>
-
-<section class="views-create">
-  <h2>New view</h2>
-  <form method="post" action="/views">
-    <label>Name <input type="text" name="name" required maxlength="80"></label>
-    <label>Description <input type="text" name="description" maxlength="200"></label>
-    <label>View type
-      <select name="view_type" required>
-        {{range .AllViewTypes}}<option value="{{.}}">{{.}}</option>{{end}}
-      </select>
-    </label>
-    <label>Default for
-      <select name="is_default_for">
-        {{range .DefaultForOptions}}<option value="{{.}}">{{if eq . ""}}—{{else}}{{.}}{{end}}</option>{{end}}
-      </select>
-    </label>
-    <label>Group by
-      <select name="group_by">
-        {{range .GroupByOptions}}<option value="{{.}}">{{if eq . ""}}—{{else}}{{.}}{{end}}</option>{{end}}
-      </select>
-    </label>
-    <label>Sort field <input type="text" name="sort_field" placeholder="title / updated_at / start_time" maxlength="40"></label>
-    <label>Sort dir
-      <select name="sort_dir">
-        {{range .SortDirOptions}}<option value="{{.}}">{{if eq . ""}}—{{else}}{{.}}{{end}}</option>{{end}}
-      </select>
-    </label>
-    <label><input type="checkbox" name="pinned" value="1"> Pinned</label>
-    <label>Filter (URL query form, e.g. <code>tag=work&amp;mgmt=mai</code>)
-      <input type="text" name="filter_query" placeholder="tag=work&mgmt=mai" value="{{.Prefill.filter}}">
-    </label>
-    <button type="submit">Create view</button>
-  </form>
-</section>
-{{end}}
--- a/web/tree_filter.go
+++ b/web/tree_filter.go
@@ -26,12 +26,6 @@ type TreeFilter struct {
 	// exposes an explicit on/off toggle.
 	ProjectPath        string
 	IncludeDescendants bool
-	// Phase 5i fix-shift — saved-view anchor. When set, the URL was
-	// `?view=<uuid>`; chip clicks need to round-trip the value so the user
-	// stays inside the saved view while narrowing further. Not a "filter"
-	// dimension in the matching sense — Matches ignores it — but it lives
-	// in the URL state and on the struct so QueryString preserves it.
-	ViewID string
 }

 // Active reports whether any filter dimension is set to something other than
@@ -70,7 +64,6 @@ func ParseTreeFilter(q url.Values) TreeFilter {
 		ShowArchived:       q.Get("show-archived") == "1",
 		ProjectPath:        strings.TrimSpace(q.Get("project")),
 		IncludeDescendants: true,
-		ViewID:             strings.TrimSpace(q.Get("view")),
 	}
 	if v := strings.TrimSpace(q.Get("public")); v != "" {
 		// Treat 1/true/yes/on as true; 0/false/no/off as false; anything else nil.
@@ -132,9 +125,6 @@ func (f TreeFilter) QueryString() string {
 			v.Set("project_descendants", "0")
 		}
 	}
-	if f.ViewID != "" {
-		v.Set("view", f.ViewID)
-	}
 	return v.Encode()
 }

--- a/web/views.go
+++ b/web/views.go
@@ -1,422 +1,10 @@
 package web

-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"net/http"
-	"net/url"
-	"strings"
-
-	"github.com/m/projax/store"
-)
-
-// Phase 5i Slice D — saved views handlers. Page-agnostic: a view bundles a
-// filter + view_type + sort/group_by and renders on any page that supports
-// that view_type. The sidebar in layout.tmpl lists every saved view; the
-// /views index lets m manage them.
-
-// handleViewsIndex renders the list + create-form page.
-func (s *Server) handleViewsIndex(w http.ResponseWriter, r *http.Request) {
-	views, err := s.Store.ListViews(r.Context())
-	if err != nil {
-		s.fail(w, r, err)
-		return
-	}
-	// Prefill: a save-from-page link can pass ?prefill_filter=<encoded TreeFilter
-	// URL query>&prefill_view_type=<vt>&prefill_page=<route> so the form opens
-	// with the user's current state already typed in.
-	prefill := map[string]string{
-		"filter":    r.URL.Query().Get("prefill_filter"),
-		"view_type": r.URL.Query().Get("prefill_view_type"),
-		"page":      r.URL.Query().Get("prefill_page"),
-	}
-	s.render(w, r, "views", map[string]any{
-		"Title":   "views",
-		"Views":   views,
-		"Prefill": prefill,
-		// Catalog of selectable values for the form selects.
-		"AllViewTypes":      allViewTypes,
-		"DefaultForOptions": []string{"", "tree", "dashboard", "calendar", "timeline"},
-		"SortDirOptions":    []string{"", "asc", "desc"},
-		"GroupByOptions":    []string{"", "status", "area", "tag", "management"},
-	})
-}
-
-// handleViewCreate accepts the create-view form POST.
-func (s *Server) handleViewCreate(w http.ResponseWriter, r *http.Request) {
-	if err := r.ParseForm(); err != nil {
-		s.fail(w, r, err)
-		return
-	}
-	in, err := viewInputFromForm(r.PostForm)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
-		return
-	}
-	v, err := s.Store.CreateView(r.Context(), in)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
-		return
-	}
-	http.Redirect(w, r, "/views/"+v.ID, http.StatusSeeOther)
-}
-
-// handleViewEdit renders the edit form for an existing view, pre-populated
-// with the row's current values. Submit posts back to /views/<id>.
-func (s *Server) handleViewEdit(w http.ResponseWriter, r *http.Request) {
-	id := strings.TrimSuffix(strings.TrimPrefix(r.URL.Path, "/views/"), "/edit")
-	if id == "" {
-		http.NotFound(w, r)
-		return
-	}
-	v, err := s.Store.GetView(r.Context(), id)
-	if err != nil {
-		if errors.Is(err, store.ErrViewNotFound) {
-			http.NotFound(w, r)
-			return
-		}
-		s.fail(w, r, err)
-		return
-	}
-	filterQuery, err := filterJSONToQuery(v.FilterJSON)
-	if err != nil {
-		s.Logger.Warn("filterJSONToQuery", "id", id, "err", err)
-	}
-	s.render(w, r, "view_edit", map[string]any{
-		"Title":             "edit view",
-		"View":              v,
-		"FilterQuery":       filterQuery,
-		"AllViewTypes":      allViewTypes,
-		"DefaultForOptions": []string{"", "tree", "dashboard", "calendar", "timeline"},
-		"SortDirOptions":    []string{"", "asc", "desc"},
-		"GroupByOptions":    []string{"", "status", "area", "tag", "management"},
-	})
-}
-
-// filterJSONToQuery rebuilds a URL-query representation of a stored
-// filter_json so the edit form can pre-populate the `filter_query` input
-// field. Inverse of filterQueryToJSON.
-func filterJSONToQuery(filterJSON []byte) (string, error) {
-	if len(filterJSON) == 0 {
-		return "", nil
-	}
-	payload := map[string]any{}
-	if err := json.Unmarshal(filterJSON, &payload); err != nil {
-		return "", err
-	}
-	f := filterFromJSONPayload(payload)
-	// QueryString re-emits the canonical URL query form; that's exactly the
-	// shape the form's `filter_query` input expects on round-trip.
-	return f.QueryString(), nil
-}
-
-// handleViewWrite dispatches the /views/<id> POST routes: bare path is
-// update; /views/<id>/delete is soft-delete.
-func (s *Server) handleViewWrite(w http.ResponseWriter, r *http.Request) {
-	path := strings.TrimPrefix(r.URL.Path, "/views/")
-	if base, ok := strings.CutSuffix(path, "/delete"); ok {
-		s.handleViewDelete(w, r, base)
-		return
-	}
-	if err := r.ParseForm(); err != nil {
-		s.fail(w, r, err)
-		return
-	}
-	in, err := viewInputFromForm(r.PostForm)
-	if err != nil {
-		http.Error(w, err.Error(), http.StatusBadRequest)
-		return
-	}
-	if _, err := s.Store.UpdateView(r.Context(), path, in); err != nil {
-		if errors.Is(err, store.ErrViewNotFound) {
-			http.NotFound(w, r)
-			return
-		}
-		http.Error(w, err.Error(), http.StatusBadRequest)
-		return
-	}
-	http.Redirect(w, r, "/views", http.StatusSeeOther)
-}
-
-// handleViewDelete soft-deletes by id.
-func (s *Server) handleViewDelete(w http.ResponseWriter, r *http.Request, id string) {
-	if err := s.Store.SoftDeleteView(r.Context(), id); err != nil {
-		if errors.Is(err, store.ErrViewNotFound) {
-			http.NotFound(w, r)
-			return
-		}
-		s.fail(w, r, err)
-		return
-	}
-	http.Redirect(w, r, "/views", http.StatusSeeOther)
-}
-
-// handleViewRedirect resolves /views/<uuid> GET into a redirect to the
-// appropriate Views-supporting page with ?view=<uuid> appended. The target
-// page resolves the saved filter+view_type at render time via
-// applySavedView. /views/<id>/edit is dispatched separately via the more
-// specific route registered first; this handler ignores the edit suffix
-// defensively when the routing pattern doesn't match for some reason.
-func (s *Server) handleViewRedirect(w http.ResponseWriter, r *http.Request) {
-	id := strings.TrimPrefix(r.URL.Path, "/views/")
-	if id == "" {
-		http.NotFound(w, r)
-		return
-	}
-	if strings.HasSuffix(id, "/edit") {
-		s.handleViewEdit(w, r)
-		return
-	}
-	v, err := s.Store.GetView(r.Context(), id)
-	if err != nil {
-		if errors.Is(err, store.ErrViewNotFound) {
-			http.NotFound(w, r)
-			return
-		}
-		s.fail(w, r, err)
-		return
-	}
-	target := targetRouteForViewType(v.ViewType)
-	q := url.Values{}
-	q.Set("view", v.ID)
-	http.Redirect(w, r, target+"?"+q.Encode(), http.StatusSeeOther)
-}
-
-// targetRouteForViewType picks a sensible landing route given the view's
-// view_type. card/list/kanban land on /; calendar on /calendar; timeline on
-// /timeline. Slice E will let `is_default_for` override.
-func targetRouteForViewType(vt string) string {
-	switch vt {
-	case ViewTypeCalendar:
-		return "/calendar"
-	case ViewTypeTimeline:
-		return "/timeline"
-	case ViewTypeCard, ViewTypeList, ViewTypeKanban:
-		return "/"
-	}
-	return "/"
-}
-
-// viewInputFromForm decodes the create/update form. filter_json is accepted
-// as either raw JSON (textarea) OR as an encoded query string under
-// `filter_query` so the save-from-page workflow can prefill from a TreeFilter
-// the user assembled via chips.
-func viewInputFromForm(form url.Values) (store.ViewInput, error) {
-	in := store.ViewInput{
-		Name:         strings.TrimSpace(form.Get("name")),
-		Description:  strings.TrimSpace(form.Get("description")),
-		ViewType:     strings.TrimSpace(form.Get("view_type")),
-		SortField:    strings.TrimSpace(form.Get("sort_field")),
-		SortDir:      strings.TrimSpace(form.Get("sort_dir")),
-		GroupBy:      strings.TrimSpace(form.Get("group_by")),
-		Pinned:       form.Get("pinned") == "1",
-		IsDefaultFor: strings.TrimSpace(form.Get("is_default_for")),
-	}
-	// Prefer filter_query when present; otherwise fall back to filter_json.
-	if fq := strings.TrimSpace(form.Get("filter_query")); fq != "" {
-		filterJSON, err := filterQueryToJSON(fq)
-		if err != nil {
-			return in, fmt.Errorf("filter_query: %w", err)
-		}
-		in.FilterJSON = filterJSON
-	} else if fj := strings.TrimSpace(form.Get("filter_json")); fj != "" {
-		in.FilterJSON = []byte(fj)
-	}
-	return in, nil
-}
-
-// filterQueryToJSON parses a TreeFilter URL query and returns the canonical
-// JSON shape stored in `filter_json`. Mirrors the design doc §2 keys.
-func filterQueryToJSON(query string) ([]byte, error) {
-	q, err := url.ParseQuery(strings.TrimPrefix(query, "?"))
-	if err != nil {
-		return nil, err
-	}
-	f := ParseTreeFilter(q)
-	payload := map[string]any{}
-	if f.Q != "" {
-		payload["q"] = f.Q
-	}
-	if len(f.Tags) > 0 {
-		payload["tags"] = f.Tags
-	}
-	if len(f.Management) > 0 {
-		payload["management"] = f.Management
-	}
-	if !(len(f.Status) == 1 && f.Status[0] == "active") {
-		payload["status"] = f.Status
-	}
-	if len(f.HasLinks) > 0 {
-		payload["has_links"] = f.HasLinks
-	}
-	if f.Public != nil {
-		payload["public"] = *f.Public
-	}
-	if f.ShowArchived {
-		payload["show_archived"] = true
-	}
-	if f.ProjectPath != "" {
-		payload["project_path"] = f.ProjectPath
-		if !f.IncludeDescendants {
-			payload["include_descendants"] = false
-		}
-	}
-	return json.Marshal(payload)
-}
-
-// applyDefaultView resolves the saved view marked is_default_for=<page>
-// when the request URL carries no filter/view-specific params and the user
-// has not opted out via ?nodefault=1. Returns the applied view (for banner
-// labelling) or nil when no default exists / was applied.
+// Phase 5j Slice A — paliad-shape redesign. The 5i overlay handlers
+// (handleViewsIndex / handleViewCreate / handleViewWrite / handleViewEdit
+// / handleViewRedirect / applySavedView / applyDefaultView / friends)
+// are deleted here. The new /views/{slug} route family lands in slice B;
+// system-view migration lands in slice C.
 //
-// Per design.md §7 Slice E: defaults are a polish layer. They only kick in
-// on a "clean" landing — the moment the user types a chip click, the URL
-// gains a filter param and the default no longer auto-applies. Same with
-// an explicit ?view=<uuid>.
-func (s *Server) applyDefaultView(r *http.Request, page string, filter *TreeFilter, viewType *string) (*store.View, error) {
-	q := r.URL.Query()
-	if q.Get("nodefault") == "1" {
-		return nil, nil
-	}
-	// Any filter-affecting param means "user is driving" — skip the default.
-	for _, key := range []string{"q", "tag", "mgmt", "status", "has", "show-archived", "public", "project", "project_id", "project_descendants", "view", "view_type", "group_by"} {
-		if q.Get(key) != "" {
-			return nil, nil
-		}
-	}
-	v, err := s.Store.DefaultViewFor(r.Context(), page)
-	if err != nil || v == nil {
-		return v, err
-	}
-	payload := map[string]any{}
-	if len(v.FilterJSON) > 0 {
-		if err := json.Unmarshal(v.FilterJSON, &payload); err != nil {
-			return v, fmt.Errorf("decode default filter_json: %w", err)
-		}
-	}
-	*filter = filterFromJSONPayload(payload)
-	*viewType = v.ViewType
-	return v, nil
-}
-
-// applySavedView resolves a `?view=<uuid>` reference and folds the persisted
-// filter + view_type back into the supplied TreeFilter + view-type slot.
-// URL chip params OVERLAY the saved filter — a saved view scoped to
-// `dev` with `?tag=work` added narrows further. Transient overlays don't
-// auto-save back to the view (the URL is bookmarkable, but to persist the
-// drift the user opens /views/<id>/edit).
-//
-// Returns the saved view (for chip labelling) or nil when no `?view=` was
-// given. Errors are logged + returned (handlers can choose to ignore).
-func (s *Server) applySavedView(r *http.Request, filter *TreeFilter, viewType *string) (*store.View, error) {
-	id := strings.TrimSpace(r.URL.Query().Get("view"))
-	if id == "" {
-		return nil, nil
-	}
-	v, err := s.Store.GetView(r.Context(), id)
-	if err != nil {
-		return nil, err
-	}
-	payload := map[string]any{}
-	if len(v.FilterJSON) > 0 {
-		if err := json.Unmarshal(v.FilterJSON, &payload); err != nil {
-			return v, fmt.Errorf("decode filter_json: %w", err)
-		}
-	}
-	saved := filterFromJSONPayload(payload)
-	saved.ViewID = id
-	q := r.URL.Query()
-	overlayURLFields(&saved, *filter, q)
-	*filter = saved
-	// view_type: URL wins when explicitly set, otherwise the saved value.
-	if strings.TrimSpace(q.Get("view_type")) == "" {
-		*viewType = v.ViewType
-	}
-	return v, nil
-}
-
-// overlayURLFields lets URL-provided chip values override the saved-view
-// baseline. The URL filter is the parsed-from-query TreeFilter; q is the
-// raw url.Values so we can detect "field was set in the URL" distinct from
-// "field's value happens to equal the zero value".
-func overlayURLFields(base *TreeFilter, urlFilter TreeFilter, q url.Values) {
-	if q.Get("q") != "" {
-		base.Q = urlFilter.Q
-	}
-	if _, ok := q["tag"]; ok {
-		base.Tags = urlFilter.Tags
-	}
-	if _, ok := q["mgmt"]; ok {
-		base.Management = urlFilter.Management
-	}
-	if _, ok := q["status"]; ok {
-		base.Status = urlFilter.Status
-	}
-	if _, ok := q["has"]; ok {
-		base.HasLinks = urlFilter.HasLinks
-	}
-	if q.Get("show-archived") != "" {
-		base.ShowArchived = urlFilter.ShowArchived
-	}
-	if q.Get("public") != "" {
-		base.Public = urlFilter.Public
-	}
-	if q.Get("project") != "" {
-		base.ProjectPath = urlFilter.ProjectPath
-	}
-	if q.Get("project_descendants") != "" {
-		base.IncludeDescendants = urlFilter.IncludeDescendants
-	}
-}
-
-// filterFromJSONPayload is the inverse of filterQueryToJSON. Keys absent
-// from the payload land at their TreeFilter zero value (Status defaults to
-// ["active"] to match ParseTreeFilter).
-func filterFromJSONPayload(p map[string]any) TreeFilter {
-	f := TreeFilter{
-		Status:             []string{"active"},
-		IncludeDescendants: true,
-	}
-	if v, ok := p["q"].(string); ok {
-		f.Q = v
-	}
-	if v, ok := p["tags"].([]any); ok {
-		f.Tags = anySliceToStrings(v)
-	}
-	if v, ok := p["management"].([]any); ok {
-		f.Management = anySliceToStrings(v)
-	}
-	if v, ok := p["status"].([]any); ok {
-		f.Status = anySliceToStrings(v)
-		if len(f.Status) == 0 {
-			f.Status = []string{"active"}
-		}
-	}
-	if v, ok := p["has_links"].([]any); ok {
-		f.HasLinks = anySliceToStrings(v)
-	}
-	if v, ok := p["public"].(bool); ok {
-		f.Public = &v
-	}
-	if v, ok := p["show_archived"].(bool); ok && v {
-		f.ShowArchived = true
-	}
-	if v, ok := p["project_path"].(string); ok {
-		f.ProjectPath = v
-	}
-	if v, ok := p["include_descendants"].(bool); ok {
-		f.IncludeDescendants = v
-	}
-	return f
-}
-
-func anySliceToStrings(in []any) []string {
-	out := make([]string, 0, len(in))
-	for _, v := range in {
-		if s, ok := v.(string); ok {
-			out = append(out, s)
-		}
-	}
-	return out
-}
+// Between slices A and B the /views URLs return 404 — by design, no real
+// user data was on the old shape (hours-old after the 5i ship).
--- a/web/views_test.go
+++ b/web/views_test.go
@@ -1,327 +0,0 @@
-package web_test
-
-import (
-	"context"
-	"encoding/json"
-	"net/url"
-	"strings"
-	"testing"
-	"time"
-)
-
-// TestViewsCRUDRoundTrip covers create → list → open (redirect to scoped page) →
-// delete, end-to-end. Requires DB. Slice D — projax.views table CRUD.
-func TestViewsCRUDRoundTrip(t *testing.T) {
-	srv, pool := mustServer(t)
-	defer pool.Close()
-	h := srv.Routes()
-
-	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
-	name := "p5i-D-view-" + stamp
-
-	defer pool.Exec(context.Background(),
-		`UPDATE projax.views SET deleted_at = now() WHERE name = $1 AND deleted_at IS NULL`, name)
-
-	// Create.
-	form := url.Values{}
-	form.Set("name", name)
-	form.Set("view_type", "card")
-	form.Set("filter_query", "tag=work&mgmt=mai")
-	code, _ := post(t, h, "/views", form)
-	if code != 303 {
-		t.Fatalf("POST /views status=%d, want 303", code)
-	}
-
-	// List page lists the new view.
-	code, body := get(t, h, "/views")
-	if code != 200 {
-		t.Fatalf("GET /views status=%d", code)
-	}
-	if !strings.Contains(body, name) {
-		t.Errorf("GET /views body missing %q", name)
-	}
-
-	// Fetch row to grab the id (and validate filter_json round-trip).
-	var (
-		id         string
-		filterJSON []byte
-		viewType   string
-	)
-	if err := pool.QueryRow(context.Background(),
-		`SELECT id, filter_json, view_type FROM projax.views WHERE name=$1 AND deleted_at IS NULL`,
-		name,
-	).Scan(&id, &filterJSON, &viewType); err != nil {
-		t.Fatalf("fetch row: %v", err)
-	}
-	if viewType != "card" {
-		t.Errorf("view_type = %q, want 'card'", viewType)
-	}
-	var payload map[string]any
-	if err := json.Unmarshal(filterJSON, &payload); err != nil {
-		t.Fatalf("filter_json unmarshal: %v", err)
-	}
-	if got, _ := payload["tags"].([]any); len(got) != 1 || got[0] != "work" {
-		t.Errorf("filter_json tags = %v, want [work]", payload["tags"])
-	}
-	if got, _ := payload["management"].([]any); len(got) != 1 || got[0] != "mai" {
-		t.Errorf("filter_json management = %v, want [mai]", payload["management"])
-	}
-
-	// GET /views/<id> redirects to the right page with ?view=<id>.
-	code, _ = get(t, h, "/views/"+id)
-	if code != 303 {
-		t.Errorf("GET /views/<id> status=%d, want 303 redirect", code)
-	}
-
-	// Soft delete.
-	code, _ = post(t, h, "/views/"+id+"/delete", url.Values{})
-	if code != 303 {
-		t.Errorf("POST delete status=%d, want 303", code)
-	}
-	var deletedAt *time.Time
-	if err := pool.QueryRow(context.Background(),
-		`SELECT deleted_at FROM projax.views WHERE id=$1`, id,
-	).Scan(&deletedAt); err != nil {
-		t.Fatalf("post-delete read: %v", err)
-	}
-	if deletedAt == nil {
-		t.Error("expected deleted_at to be set after POST /views/<id>/delete")
-	}
-}
-
-// TestViewEditFlow exercises the fix for m's bug "we cant edit views yet".
-// GET /views/<id>/edit renders the pre-filled form; POST /views/<id> updates
-// the row in place. Verifies name + view_type + filter_json round-trip.
-func TestViewEditFlow(t *testing.T) {
-	srv, pool := mustServer(t)
-	defer pool.Close()
-	h := srv.Routes()
-	ctx := context.Background()
-
-	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
-	name := "p5i-fix-edit-" + stamp
-	defer pool.Exec(context.Background(),
-		`UPDATE projax.views SET deleted_at = now() WHERE name = $1 AND deleted_at IS NULL OR name = $2`,
-		name, name+"-renamed")
-
-	var id string
-	if err := pool.QueryRow(ctx, `
-INSERT INTO projax.views (name, view_type, filter_json)
-VALUES ($1, 'list', $2::jsonb)
-RETURNING id`, name, []byte(`{"tags":["dev"]}`)).Scan(&id); err != nil {
-		t.Fatalf("seed: %v", err)
-	}
-
-	// GET /views/<id>/edit renders the pre-filled form (not the redirect).
-	code, body := get(t, h, "/views/"+id+"/edit")
-	if code != 200 {
-		t.Fatalf("GET /views/<id>/edit status=%d, want 200", code)
-	}
-	if !strings.Contains(body, `value="`+name+`"`) {
-		t.Error("edit form should pre-fill the name input")
-	}
-	if !strings.Contains(body, `value="tag=dev"`) {
-		t.Error("edit form should pre-fill filter_query from filter_json")
-	}
-
-	// Index page now shows an edit link per row.
-	_, idx := get(t, h, "/views")
-	if !strings.Contains(idx, `/views/`+id+`/edit`) {
-		t.Error("/views should expose an edit link per row")
-	}
-
-	// POST /views/<id> updates the row.
-	form := url.Values{}
-	form.Set("name", name+"-renamed")
-	form.Set("view_type", "card")
-	form.Set("filter_query", "tag=work&mgmt=mai")
-	code, _ = post(t, h, "/views/"+id, form)
-	if code != 303 {
-		t.Fatalf("POST /views/<id> status=%d, want 303", code)
-	}
-
-	var newName, newType string
-	var newFilter []byte
-	if err := pool.QueryRow(ctx,
-		`SELECT name, view_type, filter_json FROM projax.views WHERE id = $1`, id,
-	).Scan(&newName, &newType, &newFilter); err != nil {
-		t.Fatalf("post-update read: %v", err)
-	}
-	if newName != name+"-renamed" {
-		t.Errorf("name = %q, want %q", newName, name+"-renamed")
-	}
-	if newType != "card" {
-		t.Errorf("view_type = %q, want 'card'", newType)
-	}
-	payload := map[string]any{}
-	_ = json.Unmarshal(newFilter, &payload)
-	tags, _ := payload["tags"].([]any)
-	if len(tags) != 1 || tags[0] != "work" {
-		t.Errorf("filter_json tags = %v, want [work] post-update", payload["tags"])
-	}
-}
-
-// TestSavedViewPageFilterApply exercises the fix for m's bug "the filters on
-// custom views dont seem to work". A request to /?view=<id>&tag=work narrows
-// the saved view further by overlaying the URL chip onto the persisted
-// filter_json. Previously the saved filter clobbered the URL chips
-// wholesale.
-func TestSavedViewPageFilterApply(t *testing.T) {
-	srv, pool := mustServer(t)
-	defer pool.Close()
-	h := srv.Routes()
-	ctx := context.Background()
-
-	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
-	name := "p5i-fix-overlay-" + stamp
-	devSlug := "p5i-fix-overlay-d-" + stamp
-	homeSlug := "p5i-fix-overlay-h-" + stamp
-
-	defer pool.Exec(context.Background(),
-		`UPDATE projax.views SET deleted_at = now() WHERE name = $1 AND deleted_at IS NULL`, name)
-
-	var dev, home string
-	if err := pool.QueryRow(ctx, `select id from projax.items where slug='dev' and cardinality(parent_ids)=0`).Scan(&dev); err != nil {
-		t.Fatalf("dev: %v", err)
-	}
-	if err := pool.QueryRow(ctx, `select id from projax.items where slug='home' and cardinality(parent_ids)=0`).Scan(&home); err != nil {
-		t.Fatalf("home: %v", err)
-	}
-	var devID, homeID string
-	if err := pool.QueryRow(ctx, `
-INSERT INTO projax.items (kind, title, slug, parent_ids, tags)
-VALUES (array['project']::text[], 'Fix Dev', $1, ARRAY[$2]::uuid[], ARRAY['work'])
-RETURNING id`, devSlug, dev).Scan(&devID); err != nil {
-		t.Fatalf("seed dev item: %v", err)
-	}
-	if err := pool.QueryRow(ctx, `
-INSERT INTO projax.items (kind, title, slug, parent_ids, tags)
-VALUES (array['project']::text[], 'Fix Home', $1, ARRAY[$2]::uuid[], ARRAY['home'])
-RETURNING id`, homeSlug, home).Scan(&homeID); err != nil {
-		t.Fatalf("seed home item: %v", err)
-	}
-	defer pool.Exec(context.Background(), `delete from projax.items where id in ($1,$2)`, devID, homeID)
-
-	// Saved view with view_type=list and NO tag filter — both items should pass.
-	var id string
-	if err := pool.QueryRow(ctx, `
-INSERT INTO projax.views (name, view_type, filter_json)
-VALUES ($1, 'list', '{}'::jsonb)
-RETURNING id`, name).Scan(&id); err != nil {
-		t.Fatalf("seed view: %v", err)
-	}
-
-	devLink := `href="/i/dev.` + devSlug + `"`
-	homeLink := `href="/i/home.` + homeSlug + `"`
-
-	// Open view alone — both rows should appear.
-	_, baseBody := get(t, h, "/?view="+id)
-	if !strings.Contains(baseBody, devLink) {
-		t.Error("saved view without tag filter should show dev row")
-	}
-	if !strings.Contains(baseBody, homeLink) {
-		t.Error("saved view without tag filter should show home row")
-	}
-
-	// Overlay ?tag=work — home row should disappear; dev should remain.
-	_, narrowedBody := get(t, h, "/?view="+id+"&tag=work")
-	if !strings.Contains(narrowedBody, devLink) {
-		t.Error("?view=<id>&tag=work should still show dev row (work-tagged)")
-	}
-	if strings.Contains(narrowedBody, homeLink) {
-		t.Error("?view=<id>&tag=work should hide home row — URL chip must overlay saved filter")
-	}
-
-	// Chip URLs inside the saved view must round-trip the view= param so
-	// chip clicks don't strip the saved view.
-	if !strings.Contains(narrowedBody, "view="+id) {
-		t.Error("chip URLs inside a saved view should carry view=<id> forward")
-	}
-}
-
-// TestDefaultViewAppliedOnCleanURL verifies the Slice E behaviour: when /
-// is requested with no chip params and a default view exists for the page,
-// the saved filter + view_type apply and a "Showing default view: …"
-// banner renders. Adding any chip param (?tag=…) bypasses the default.
-// ?nodefault=1 is the explicit opt-out.
-func TestDefaultViewAppliedOnCleanURL(t *testing.T) {
-	srv, pool := mustServer(t)
-	defer pool.Close()
-	h := srv.Routes()
-	ctx := context.Background()
-
-	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
-	name := "p5i-E-default-" + stamp
-	defer pool.Exec(context.Background(),
-		`UPDATE projax.views SET deleted_at = now() WHERE name = $1 AND deleted_at IS NULL`, name)
-
-	if _, err := pool.Exec(ctx, `
-INSERT INTO projax.views (name, view_type, filter_json, is_default_for)
-VALUES ($1, 'card', $2::jsonb, 'tree')`,
-		name, []byte(`{"tags":["work"]}`)); err != nil {
-		t.Fatalf("seed default view: %v", err)
-	}
-
-	// Clean URL: default applies → card view + banner.
-	_, body := get(t, h, "/")
-	if !strings.Contains(body, `class="tree-card-grid"`) {
-		t.Error("clean / should auto-apply default view (card grid expected)")
-	}
-	if !strings.Contains(body, `default-banner`) {
-		t.Error("default-banner should render when a default applies")
-	}
-	if !strings.Contains(body, name) {
-		t.Error("banner should name the applied default view")
-	}
-
-	// Any chip param bypasses the default → list view (no banner).
-	_, withChip := get(t, h, "/?tag=dev")
-	if strings.Contains(withChip, `default-banner`) {
-		t.Error("default banner should disappear once user types a chip")
-	}
-	if !strings.Contains(withChip, `<ul class="forest">`) {
-		t.Error("?tag=dev should render the forest (default not applied)")
-	}
-
-	// Explicit opt-out via ?nodefault=1.
-	_, optOut := get(t, h, "/?nodefault=1")
-	if strings.Contains(optOut, `default-banner`) {
-		t.Error("?nodefault=1 should suppress the default banner")
-	}
-	if !strings.Contains(optOut, `<ul class="forest">`) {
-		t.Error("?nodefault=1 should render the forest (default suppressed)")
-	}
-}
-
-// TestSavedViewAppliedOnQueryParam verifies that opening / with ?view=<uuid>
-// re-applies the saved filter+view_type. We seed a view tagged work=patents
-// and assert the rendered tree has the right ProjectChip / chip-on state.
-func TestSavedViewAppliedOnQueryParam(t *testing.T) {
-	srv, pool := mustServer(t)
-	defer pool.Close()
-	h := srv.Routes()
-	ctx := context.Background()
-
-	stamp := strings.ReplaceAll(time.Now().UTC().Format("150405.000"), ".", "")
-	name := "p5i-D-saved-" + stamp
-	defer pool.Exec(context.Background(),
-		`UPDATE projax.views SET deleted_at = now() WHERE name = $1 AND deleted_at IS NULL`, name)
-
-	// Seed directly via SQL so the assertion focuses on the resolver, not the
-	// form flow tested above.
-	var id string
-	if err := pool.QueryRow(ctx, `
-INSERT INTO projax.views (name, view_type, filter_json)
-VALUES ($1, 'card', $2::jsonb)
-RETURNING id`, name, []byte(`{"project_path":"dev","include_descendants":true}`)).Scan(&id); err != nil {
-		t.Fatalf("seed view: %v", err)
-	}
-
-	_, body := get(t, h, "/?view="+id)
-	if !strings.Contains(body, `class="tree-card-grid"`) {
-		t.Error("?view= should override view_type → card view should render")
-	}
-	if !strings.Contains(body, `class="proj-chip chip-on"`) {
-		t.Error("?view= should apply project filter chip → proj-chip should be on")
-	}
-}