fix: editor usability and visual polish from UI scan

- Rule name is now an inline text field at the top of the editor; the
  pencil/rename button and alert are gone (it was unclear what the edit
  button did). Names are sanitized on commit: trimmed, falling back to
  the kind's default when emptied
- Day-of-week toggles fill the full row width with equal cells and
  >= 44pt tap targets
- 'Add Rule' commit button sits on a bar-material bottom inset so form
  content no longer collides with it while scrolling (found via
  computer-use scan; verified clean in a follow-up scan)
- Tests: 95 passing — new specs for the inline rename flow, day-toggle
  geometry, and name sanitization; three tests now scroll to reach
  bottom-of-form controls, matching real user behavior
- Spec §6 updated for the editor changes

docs/RULES_FEATURE_SPEC.md

@@ -344,7 +344,7 @@ reference for *what* the feature does; presentation now maps as follows:
 | Apps home | `NavigationStack` + `List`; "Blocked Apps" and "Rules" sections; **rules are list rows** (kind icon, name, block summary, trailing live status — green when active); "+" toolbar button |
 | Rule detail | Sheet with inline nav title (name + "Schedule, 6h left" caption), `LabeledContent` rows, "Edit Rule" row pushes the editor; hard-locked rules show a lock row instead |
 | New Rule | `List` with a "Rule Type" section and preset sections as plain rows; editor pushed via `navigationDestination(item:)` |
-| Rule editor | Native `Form`: `DatePicker` rows, day-circle row with the summary in the section header, toggle rows with footers, stepper rows. Create commits with a prominent **"Add Rule"** button (replaces Hold to Commit); edit uses toolbar **Done** plus red Disable/Delete rows |
+| Rule editor | Native `Form`: an inline **Name text field** at the top (no separate rename button; empty names fall back to the kind default), `DatePicker` rows, full-width day-circle row (≥44pt tap targets) with the summary in the section header, toggle rows with footers, stepper rows. Create commits with a prominent **"Add Rule"** button on a bar-material inset (replaces Hold to Commit); edit uses toolbar **Done** plus red Disable/Delete rows |
 | Onboarding / app picker | System styling, `.borderedProminent` buttons, default color scheme (no forced dark, default accent) |
 
 Dropped custom components: `Theme`, `HoldToCommitButton`, `RuleCardView`,