---
phase: 05-discovery-navigation-framework
verified: 2026-03-06T22:00:00Z
status: gaps_found
score: 16/17 must-haves verified
human_verification:
  - test: "Popup Esc closes popup first, does not trigger mode navigation"
    expected: "Opening a card summary popup and pressing Esc should close the popup without triggering the discovery Esc handler"
    why_human: "Popup dismiss vs FocusScope priority is a runtime Slint behavior that cannot be verified statically"
  - test: "Tab strip renders four icon tabs visually at correct positions"
    expected: "Four vertically stacked icon tabs (clock, calendar, person, package) at left edge below title bar, no overlap with card grid"
    why_human: "Visual rendering of Unicode emoji glyphs and layout positioning requires visual inspection"
  - test: "Toast overlay displays at bottom-center with correct text"
    expected: "Toast appears centered at bottom of window with semi-transparent dark background and white text"
    why_human: "Toast visibility and animation behavior require runtime observation"
---

# Phase 05: Discovery Navigation Framework Verification Report

**Phase Goal:** Implement discovery navigation framework with mode state machine, tab strip UI, keyboard navigation, and toast overlay
**Verified:** 2026-03-06T22:00:00Z
**Status:** gaps_found
**Re-verification:** No -- initial verification

## Goal Achievement

### Observable Truths

| # | Truth | Status | Evidence |
|---|-------|--------|----------|
| 1 | DiscoveryMode enum has exactly four variants | VERIFIED | discovery.rs lines 7-12: ByStatusUpdated, ByShipDate, ByRecipient, ByProductShipped |
| 2 | Mode cycling wraps around in both directions | VERIFIED | next()/prev() methods with match arms; 2 tests pass (next_cycles_forward_with_wrap, prev_cycles_backward_with_wrap) |
| 3 | Default mode is ByStatusUpdated | VERIFIED | DEFAULT const = ByStatusUpdated; test default_is_by_status_updated passes |
| 4 | Single Esc produces ClearFiltersAndScrollTop action | VERIFIED | handle_esc() returns ClearFiltersAndScrollTop on first call; test passes |
| 5 | Double Esc within 500ms produces ResetToDefault action | VERIFIED | handle_esc_at() with 200ms gap returns ResetToDefault, mode reset to DEFAULT; test passes |
| 6 | Double Esc outside 500ms window produces two single-Esc actions | VERIFIED | handle_esc_at() with 600ms gap returns ClearFiltersAndScrollTop both times, mode unchanged; test passes |
| 7 | Cards sort by mode criterion with recipient_id tiebreaker | VERIFIED | sort_cards_by_mode uses sort_by with primary/tiebreaker; 6 sort tests pass |
| 8 | Left-side tab strip shows four icon tabs, always visible | VERIFIED | tab-strip.slint: 180 lines, 4 tabs with Unicode glyphs at y:4,48,92,136px |
| 9 | Active tab has left accent bar and lighter background highlight | VERIFIED | Conditional 3px Rectangle (#203a73) + background #e8ecf2 on active index match |
| 10 | Clicking a tab switches discovery mode immediately | VERIFIED | TouchArea clicked => root.tab-clicked(index) callback; set_mode_by_index in DashboardRuntime |
| 11 | Up/Down arrow keys cycle discovery mode and trigger tab flash | VERIFIED | FocusScope key-pressed handles UpArrow/DownArrow; switch_mode_up/down methods tested |
| 12 | Esc once shows 'Filters cleared' toast and scrolls card grid to top | VERIFIED | toast_message_for_esc(ClearFiltersAndScrollTop) returns "Filters cleared"; esc-pressed callback in FocusScope |
| 13 | Double-Esc within 500ms shows 'Back to Status Updated' toast | VERIFIED | toast_message_for_esc(ResetToDefault) returns "Back to Status Updated" |
| 14 | Home key scrolls to top, End key scrolls to bottom | VERIFIED | FocusScope handles Key.Home and Key.End, callbacks home-pressed/end-pressed declared |
| 15 | Keyboard shortcuts suppressed when TextInput has focus | VERIFIED | FocusScope enabled: !root.text-input-focused |
| 16 | Popup Esc closes popup first, does not trigger mode navigation | ? UNCERTAIN | Cannot verify Slint popup/FocusScope priority statically |
| 17 | Card grid is offset right by tab strip width, no overlap | VERIFIED | Card grid at x:60px (48px tab + 12px gap), tab strip at x:0 width:48px |

**Score:** 16/17 truths verified (1 needs human testing)

### Required Artifacts

| Artifact | Expected | Status | Details |
|----------|----------|--------|---------|
| `crates/app/src/dashboard/discovery.rs` | DiscoveryMode enum, DiscoveryState, EscAction, sort_cards_by_mode | VERIFIED | 365 lines, exports DiscoveryMode/DiscoveryState/EscAction, 19 tests |
| `crates/app/src/dashboard/projection.rs` | sort_cards_by_mode re-export | VERIFIED | Re-exports sort_cards_by_mode from discovery module |
| `crates/app/ui/tab-strip.slint` | TabStrip with 4 tabs, active state, flash, tooltips | VERIFIED | 180 lines, 4 icon tabs, accent bar, flash-active, hover tooltips |
| `crates/app/ui/dashboard.slint` | Layout with TabStrip, FocusScope, Flickable, toast | VERIFIED | 205 lines, imports TabStrip, FocusScope with 5 key handlers, Flickable, toast overlay |
| `crates/app/src/dashboard/mod.rs` | DashboardRuntime discovery integration | VERIFIED | discovery_state field, switch_mode_up/down, handle_esc, set_mode_by_index, toast_message_for_esc |

### Key Link Verification

| From | To | Via | Status | Details |
|------|----|-----|--------|---------|
| dashboard.slint | mod.rs | Callbacks: mode-switch-up, mode-switch-down, esc-pressed | WIRED | Callbacks declared in dashboard.slint; DashboardRuntime has matching methods |
| dashboard.slint | tab-strip.slint | import and embed TabStrip | WIRED | `import { TabStrip } from "tab-strip.slint"` at line 2; TabStrip embedded at line 112 |
| mod.rs | discovery.rs | DashboardRuntime calls DiscoveryState methods | WIRED | discovery_state.mode.prev(), discovery_state.set_mode(), discovery_state.handle_esc() |
| projection.rs | discovery.rs | sort_cards_by_mode re-export | WIRED | Calls super::discovery::sort_cards_by_mode |

### Requirements Coverage

| Requirement | Source Plan | Description | Status | Evidence |
|-------------|------------|-------------|--------|----------|
| DISC-02 | 05-02 | UI provides left-side tabs for discovery mode switching | SATISFIED | tab-strip.slint at x:0 in dashboard layout |
| DISC-03 | 05-01 | Discovery modes: By Status Updated, By Ship Date, By Recipient, By Product Shipped | SATISFIED | DiscoveryMode enum with exactly these 4 variants |
| DISC-07 | 05-01, 05-02 | Up/Down arrows cycle discovery mode | SATISFIED | FocusScope key handlers + switch_mode_up/down methods |
| DISC-08 | 05-01, 05-02 | Esc once returns to home screen | SATISFIED | handle_esc -> ClearFiltersAndScrollTop, toast "Filters cleared" |
| DISC-09 | 05-01, 05-02 | Esc twice returns to default mode | SATISFIED | Double-Esc within 500ms -> ResetToDefault, mode reset to ByStatusUpdated |

No orphaned requirements found. REQUIREMENTS.md maps DISC-02, DISC-03, DISC-07, DISC-08, DISC-09 to Phase 5 -- all accounted for.

### Anti-Patterns Found

| File | Line | Pattern | Severity | Impact |
|------|------|---------|----------|--------|
| (none) | - | - | - | No anti-patterns detected |

### Human Verification Required

### 1. Popup Esc Behavior

**Test:** Open a card summary popup, then press Esc
**Expected:** Popup closes without triggering the discovery Esc handler (no toast, no mode reset)
**Why human:** Slint popup dismiss vs FocusScope event priority is determined at runtime; cannot be verified by static code analysis

### 2. Tab Strip Visual Rendering

**Test:** Launch the application and observe the left-side tab strip
**Expected:** Four vertically stacked icon tabs (clock, calendar, person, package) below the title bar at the left edge; active tab shows blue accent bar and lighter background; no overlap with card grid content
**Why human:** Unicode emoji glyph rendering and pixel-level layout require visual inspection

### 3. Toast Overlay Appearance

**Test:** Press Esc or double-Esc to trigger toast
**Expected:** Toast appears centered at bottom of window with semi-transparent dark background, white text showing "Filters cleared" or "Back to Status Updated", with 200ms fade animation
**Why human:** Toast visibility, positioning, and animation behavior require runtime observation

### Gaps Summary

**Gap 1: No Slint UI window launched — visual testing impossible**
The app binary (`main.rs`) is a CLI stub that prints and exits. No Slint window is created, so the 3 human verification items (popup Esc behavior, tab strip rendering, toast overlay) cannot be tested. A Slint window launch is needed before these UI components can be visually verified.

- Popup Esc behavior — untestable without running UI
- Tab strip visual rendering — untestable without running UI
- Toast overlay appearance — untestable without running UI

---

_Verified: 2026-03-06T22:00:00Z_
_Verifier: Claude (gsd-verifier)_