Summary

The folder-mode panel of the Index tab exposed two side-by-side buttons:

• Index (primary, blue) → POST /api/index (non-stream)
• Index with Progress (ghost, gray) → SSE-streamed GET /api/index/stream

The two-button shape made users guess which one to pick and diluted the form's primary action. This PR drops the non-stream button entirely and routes the single primary 인덱스 / Index button through the streaming handler so progress is always visible.

This is option (a) from the umbrella discussion (Prev #1). Option (b) — single button + a "show progress" toggle — would have kept two indexing paths alive and required a more complex STATE.indexing shape in #582 PR #6 (4.11). With (a) the indexing path is unified; PR #6 can use a single boolean flag.

Made possible by #591

#591 (closed #590) gave index_path_stream the missing namespace parameter and a complete.errors field — both consumed here. Without #591, this PR would silently regress the namespace input and the partial-failure UX (#354 fix).

Changes

• web/static/app.js:
  • Delete the inline qs('index-btn').addEventListener('click', async () => {...}) handler (~70 LOC) that called POST /api/index.
  • runIndexStream now: reads namespace from qs('index-namespace') and passes it as a query param when non-empty; renders complete.errors into r-errors-row with the 5-cap "+N more" rule (preserves the index: POST /api/index returns 200 OK when all embeddings fail #354 partial-failure surface); dispatches toast.index_partial (red) on partial failure or toast.indexed_count (green, with the "Register as Source" toast action — folder mode is one-shot, mirroring the previous inline behavior).
  • Drop all qs('index-stream-btn') references (button no longer exists).
  • Listener registration switches from index-stream-btn → index-btn.
  • Section header renamed // Index stream (SSE progress) → // Index (SSE-streamed; folder-mode primary action) to reflect the new role.
• web/static/index.html: drop the <div class="index-btn-row"> wrapper and the index-stream-btn button. Single primary index-btn remains.
• web/static/locales/{en,ko}.json: remove index.stream_btn and toast.stream_complete. Other keys (index.index_btn, toast.indexed_count, toast.index_partial, toast.action.register_persistent, toast.index_failed, toast.stream_fallback) stay.
• web/static/style.css: drop .index-btn-row rule (it wrapped two buttons; now wraps one → row container unnecessary).
• tests/test_i18n.py: remove toast.stream_complete from the required-key set so the parity guard stays green.

Net diff: −97 / +47, six files (mostly deletions; a handful of additions inside runIndexStream for namespace + error rendering).

What does NOT change

• Backend (POST /api/index is still mounted; CLI / MCP callers continue to use it). This PR only changes the web folder-mode UI.
• runIndexStream function name is kept (the mechanism IS streaming via EventSource — the name describes the implementation faithfully).
• Hardcoded English status message "Please enter a path to index." (existed in both the inline handler and runIndexStream pre-PR; pre-existing i18n gap, out of scope here).

Refs

• Umbrella: feat(web): Index tab mid-priority follow-ups (each ships as its own PR) #582 (Prev chore: prepare for open-source release #1)
• Prerequisite: Streaming indexing endpoint missing namespace + errors parity #590 / fix(indexing): stream endpoint namespace + errors parity (#590) #591 (merged)
• Inspires: feat(web): Index tab mid-priority follow-ups (each ships as its own PR) #582 PR docs: slim READMEs, add configuration + embeddings guides #6 (4.11) — single indexing path → single boolean STATE.indexing flag suffices

Test plan

• uv run ruff check packages/memtomem/src && uv run ruff format --check packages/memtomem/src
• uv run pytest packages/memtomem/tests/test_i18n.py -m "not ollama" — 12/12 pass (parity guard green after stream_complete removal from the required set).
• uv run pytest packages/memtomem/tests/test_indexing_engine.py packages/memtomem/tests/test_web_routes.py packages/memtomem/tests/test_i18n.py packages/memtomem/tests/test_web_exclude_guard.py -m "not ollama" — 204/204 pass. No regressions in engine / routes / i18n / exclude guards.
• Visual via Playwright (1280×800):
  • Index → 폴더 인덱싱 mode shows a single primary 인덱스 button (no ghost 진행률 표시 인덱스 sibling).
  • Empty-path click → status message Please enter a path to index. displays directly under the button (the .index-btn-row removal does not cause cramping; index-progress and index-msg keep their own spacing).
  • 0 console errors after page load + button click.
  • All /api/* initialization calls return 200.

🤖 Generated with Claude Code