P32-UI-HOME-MINIMAL — bounded Home cleanup

Status: LOCAL_DONE Validation: PASS

User scope (2026-10-06): remove the blank strip above the bottom navigation icons and temporarily remove the Home "Update price" floating action. Code changes only; no ADB/device interaction after the user's clarification.

Base: 9fe9af3, the clean codex/ui-explore-footer-spacing worktree head, including the previous footer removal and compact three-tab navigation. Isolated branch: codex/phase-32-home-minimal. The occupied P32 checkout and existing UI worktree are preserved.

Presentation contract: B-BR-C01/BUC-C01 discovery retains price/source and staleness metadata; B-BR-C02/BUC-C02 contextual capture remains available. The shell owns bottom-navigation/system padding and consumes it before child screen scaffolds calculate their safe area. No hard-coded system-bar height, new dependency, backend, domain, storage or permission change.

Checks: existing HomeViewModel and NavigationTab unit tests, debug APK build, Android instrumentation source compilation, lint, diff/secret-surface review. Light/dark visual acceptance uses the supplied screenshots as the reference; runtime visual verification remains unperformed under the code-only request.

Remote issue/PR/push/merge/wiki are outside this request. Integration pending. Rollback: revert this task's presentation commit, retaining the inherited UI.

Source validation

ANDROID_HOME=/data/dev/android/sdk/Sdk ./gradlew :app:testDebugUnitTest --tests '*HomeViewModelTest' --tests '*NavigationTabTest' :app:assembleDebug :app:compileDebugAndroidTestKotlin :app:lintDebug --console=plain PASS, 2m 1s. HomeViewModel: 4/4; NavigationTab: 6/6; zero failures/errors/skips. APK and instrumentation source compilation PASS. No instrumentation executed. Lint: zero errors, 162 warnings. One unused accessibility-string warning follows the temporary FAB removal; its existing translations are retained for restoration. The initial command failed before task execution because ANDROID_HOME and ANDROID_SDK_ROOT differed; using the configured SDK path resolved it without repository/environment configuration edits.

git diff --check PASS. Scoped added-source secret review PASS: only the inset-consumption import, modifier and comments were added. No device install, launch or visual verification after the code-only clarification. The inherited three-tab geometry/colors and system navigation safe area are preserved.

Follow-up — symmetric bottom navigation spacing

2026-10-06: the user subsequently authorized ADB installation on the Poco. The fa18d04 APK was installed with install -r, opened successfully and visually checked in dark mode: no Home floating action or duplicate inset strip. This supersedes the earlier code-only runtime limitation for that scoped check.

New bounded request: add a small top gap matching the existing 8 dp gap between the tab group and the lower system safe area. Use one shared 8 dp vertical-padding value above icons and below labels; retain system insets, the three tabs and the Home action removal (B-BR-C01 / BUC-C01–C02). Checks: existing NavigationTab tests, debug APK build, lint, diff/secret review; install on the explicitly identified Poco and inspect the resulting Home. Follow-up validation: PASS / LOCAL_DONE / INTEGRATION_PENDING.

ANDROID_HOME=/data/dev/android/sdk/Sdk ./gradlew :app:testDebugUnitTest --tests '*NavigationTabTest' :app:assembleDebug :app:lintDebug --console=plain PASS (52s), 6 tests, zero failures/errors/skips; lint zero errors, the same 162 warnings. git diff --check and scoped secret-surface review PASS.

Poco Android APK updated with adb -s <identified-phone> install -r; Success. Cold launch: Status ok, TotalTime 1137ms. Dark-mode Home screenshot inspected: small top margin added, lower margin/system safe area preserved, all three tabs visible, Home update action absent. Screenshot retained only in /tmp; no device data committed. Other connected surfaces were not targeted. APK SHA-256: 28ec8df2ba30d5b054b7487c5c277207af39df2c4b3928f4301a008eae73ec2d. Light-mode runtime/full commercial acceptance were not claimed by this check.

Follow-up — tab touch feedback and distinct navigation surfaces

2026-10-06 user scope: include the 8 dp tab margins in touch feedback and give the bottom navigation and standard header a slightly stronger color than page backgrounds in light/dark mode. Keep the symmetric spacing, three tabs, safe areas and Home action removal. B-BR-C01 / BUC-C01–C02 remain unchanged.

Move vertical padding into each selectable tab so the entire tab cell responds to presses. Use Material 3 surfaceContainer for both navigation surfaces; unselected icon backgrounds stay transparent. Standard header defaults share the same container tone, while explicit screen overrides remain supported. Checks: navigation/contrast unit tests, debug APK + lint, diff/secret review; Poco installation and light/dark visual/touch checks. Validation: PASS; LOCAL_DONE / INTEGRATION_PENDING.

ANDROID_HOME=/data/dev/android/sdk/Sdk ./gradlew :app:testDebugUnitTest --tests '*NavigationTabTest' --tests '*ColorContrastTest' :app:assembleDebug :app:lintDebug --console=plain PASS (27s). Navigation 6/6 and contrast 2/2, zero failures/errors/skips. Text and inactive-label contrast on the new container surface meet AA in both static themes. Lint: zero errors, unchanged 162 warnings. git diff --check and scoped secret review PASS.

Poco install -r: Success; cold launch Status ok (1526ms). Home inspected in light and dark themes. Header/bottom surfaces are visibly distinct from the page and match each other; inactive icons have no mismatched backdrop. Injected DOWN inside the top 8 dp margin, then captured fully expanded feedback before UP in each theme: the whole Explore cell is highlighted, including top/bottom padding, stopping at the adjacent tab and system safe area. The original light theme was restored. Screenshots remain in /tmp only. APK SHA-256: 4c66d82ac53d7b1ba1f6e250cee721abe8a11acf6c88d1bba8843706a9d7121f. No device data in Git, remote publication or broader commercial acceptance.