fix: quiet default appimage startup

backlog/tasks/task-102 - Quiet-default-AppImage-startup-and-implicit-background-launch.md

@@ -0,0 +1,65 @@
+---
+id: TASK-102
+title: Quiet default AppImage startup and implicit background launch
+status: Done
+assignee:
+  - codex
+created_date: '2026-03-06 21:20'
+updated_date: '2026-03-06 21:33'
+labels: []
+dependencies: []
+references:
+  - /home/sudacode/projects/japanese/SubMiner/src/main-entry-runtime.ts
+  - /home/sudacode/projects/japanese/SubMiner/src/core/services/cli-command.ts
+  - /home/sudacode/projects/japanese/SubMiner/src/main.ts
+priority: medium
+---
+
+## Description
+
+<!-- SECTION:DESCRIPTION:BEGIN -->
+Make the packaged Linux no-arg launch path behave like a quiet background start instead of surfacing startup-only noise.
+
+Scope:
+
+- Treat default background entry launches as implicit `--start --background`.
+- Keep the `--password-store` diagnostic out of normal startup output.
+- Suppress known startup-only `node:sqlite` and `lsfg-vk` warnings for the entry/background launch path.
+- Avoid noisy protocol-registration warnings during normal startup when registration is unsupported.
+<!-- SECTION:DESCRIPTION:END -->
+
+## Acceptance Criteria
+
+<!-- AC:BEGIN -->
+- [x] #1 Initial background launch reaches the start path without logging `No running instance. Use --start to launch the app.`
+- [x] #2 Default startup no longer emits the `Applied --password-store gnome-libsecret` line at normal log levels.
+- [x] #3 Entry/background launch sanitization suppresses the observed `ExperimentalWarning: SQLite...` and `lsfg-vk ... unsupported configuration version` startup noise.
+- [x] #4 Regression coverage documents the new startup behavior.
+<!-- AC:END -->
+
+## Implementation Notes
+
+<!-- SECTION:NOTES:BEGIN -->
+Normalized no-arg/password-store-only entry launches to append implicit `--start --background`, and upgraded `--background`-only entry launches to include `--start`.
+
+Applied shared entry env sanitization before loading the main process so default startup strips the `lsfg-vk` Vulkan layer and sets `NODE_NO_WARNINGS=1`; background children keep the same sanitized env.
+
+Downgraded startup-only protocol-registration failure logging to debug, and routed the Linux password-store diagnostic through the scoped debug logger instead of raw console output.
+
+Verification:
+
+- `bun test src/main-entry-runtime.test.ts src/main/runtime/anilist-setup-protocol.test.ts src/main/runtime/anilist-setup-protocol-main-deps.test.ts`
+- `bun run test:fast`
+
+Note: the final `node --experimental-sqlite --test dist/main/runtime/registry.test.js` step in `bun run test:fast` still prints Node's own experimental SQLite warning because that test command explicitly enables the feature flag outside the app entrypoint.
+<!-- SECTION:NOTES:END -->
+
+## Final Summary
+
+<!-- SECTION:FINAL_SUMMARY:BEGIN -->
+Default packaged startup is now quiet and behaves like an implicit `--start --background` launch.
+
+- No-arg AppImage entry launches now append `--start --background`, and `--background`-only launches append the missing `--start`.
+- Entry/background startup sanitization now suppresses the observed `lsfg-vk` and `node:sqlite` warnings on the app launch path.
+- Linux password-store and unsupported protocol-registration diagnostics now stay at debug level instead of normal startup output.
+<!-- SECTION:FINAL_SUMMARY:END -->