phase: 106_document_dates

Everything is verified green. Final report:

**Phase 106 — Document dates (final verification pass; all 10 tasks already complete)**

- Verified all phase artifacts: alembic `0020` (dev DB at `0020`), `doc_dates.py`, git `file_commit_dates`, importer `doc_dates_by_root`/`dates_updated`, both entry-point wirings, date APIs + tree `created_at`/`updated_at`, LLM surfaces (prompt block, `read` line 2, appended `ls` field), `apply_recency_boost` in `retrieve()`, UI columns/badge, admin editor, mock-LLM regex — all present and correct; no defects found, no fixes needed.
- `uv run pytest --cov=app --cov-report=term-missing` → **2299 passed, TOTAL 99%** (>90% ✓)
- `uv run pytest tests/e2e/test_document_dates.py -v --no-cov` → **6/6 passed** in isolation (DB up)
- 12 regression E2E suites (retrieval_quality, whole_document_context, agent_document_tools, ls_tree_drilldown, read_truncation_cap, kb_tree, kb_tree_nav, document_viewer, edit_summaries, import_documents, sync_button, hidden_folders_toggle, smoke) → **all green in isolation**
- `uv run ruff check .` → clean; `uv run pyright` → **0 errors, 0 warnings**

**Completion criteria:** 1) non-null `created_at` + 0020 upgrade/downgrade on dev DB ✓ (real-Alembic integration tests) 2) sync refresh/older/manual-persists/content-reset/no sources_meta bump ✓ 3) zip/tar mtime + future→today ✓ 4) LLM date surfaces + cross-check ✓ 5) UI Created/Updated/badge positions ✓ 6) admin editor set+revert round-trip ✓ 7) old-correct-beats-new-similar (defaults & boost-off) + near-tie + `BOR_RECENCY_BOOST=0` byte-identical ✓ 8) full gate ✓ 9) commit/phase-move — left to harness per instructions.

- **Notable:** recency default tuned 0.001 → **0.0007** (task 07 step 5 explicitly permits; measured margins recorded in `test_recency_boost.py` docstring).
- **Next pending phase:** none — `todo/` holds only this phase.

tests/e2e/test_kb_tree.py

@@ -540,10 +540,10 @@ def test_top_level_lists_sources_with_descriptions(
     rows = page.locator("#folders-tbody tr")
     expect(rows.nth(0).locator("a.folder-link")).to_have_text(ALPHA)
     expect(rows.nth(0).locator("td:nth-child(2)")).to_have_text(str(ALPHA_COUNT))
-    expect(rows.nth(0).locator("td:nth-child(3) span")).to_have_text(ALPHA_ROOT_SUM)
+    expect(rows.nth(0).locator("td:nth-child(4) span")).to_have_text(ALPHA_ROOT_SUM)
     expect(rows.nth(1).locator("a.folder-link")).to_have_text(BETA)
     expect(rows.nth(1).locator("td:nth-child(2)")).to_have_text(str(BETA_COUNT))
-    expect(rows.nth(1).locator("td:nth-child(3) span")).to_have_text(BETA_ROOT_SUM)
+    expect(rows.nth(1).locator("td:nth-child(4) span")).to_have_text(BETA_ROOT_SUM)
     # The edit affordance is ALWAYS present (a description can be
     # CREATED where none is stored) — the row surface, one per row.
     expect(page.locator("#folders-tbody .kb-summary-edit")).to_have_count(2)
@@ -602,13 +602,15 @@ def test_drill_into_source(
     expect(rows).to_have_count(2)
     expect(rows.nth(0).locator("a.folder-link")).to_have_text("one")
     expect(rows.nth(0).locator("td:nth-child(2)")).to_have_text("2")
-    expect(rows.nth(0).locator("td:nth-child(3) span")).to_have_text(ONE_SUM)
+    expect(rows.nth(0).locator("td:nth-child(4) span")).to_have_text(ONE_SUM)
     expect(rows.nth(1).locator("a.folder-link")).to_have_text("two")
     expect(rows.nth(1).locator("td:nth-child(2)")).to_have_text("2")
-    expect(rows.nth(1).locator("td:nth-child(3) span")).to_have_text(TWO_SUM)
+    expect(rows.nth(1).locator("td:nth-child(4) span")).to_have_text(TWO_SUM)
 
-    # The level's direct files: root-note.md — the UNCHANGED 5-column
-    # contract (makeRow): Source | Path | Title | Chunks | Indexed.
+    # The level's direct files: root-note.md — the 6-column contract
+    # (makeRow): Source | Path | Title | Chunks | Created | Indexed
+    # (phase 106, task 08, D8: Created BEFORE Indexed — the cell
+    # carries the locale date, the full ISO on its title).
     expect(page.locator("#docs-table")).to_be_visible()
     frows = page.locator("#docs-tbody tr")
     expect(frows).to_have_count(1)
@@ -616,7 +618,7 @@ def test_drill_into_source(
     expect(frows.nth(0).locator("a.doc-link")).to_have_text(ROOT_NOTE)
     expect(frows.nth(0).locator("td:nth-child(3)")).to_have_text("Alpha Root Note")
     expect(frows.nth(0).locator("td:nth-child(4)")).to_have_text(str(root_chunks))
-    expect(frows.nth(0).locator("td:nth-child(5)")).not_to_have_text("")
+    expect(frows.nth(0).locator("td:nth-child(6)")).not_to_have_text("")
 
 
 # --------------------------------------------------------------------------
@@ -711,7 +713,7 @@ def test_edit_folder_description(
     # (the textContent re-render — the canned text is gone); the
     # always-present Edit button is back.
     expect(status).to_have_text("Description updated.")
-    expect(row.locator("td:nth-child(3) span")).to_have_text(NEW_ALPHA_ONE)
+    expect(row.locator("td:nth-child(4) span")).to_have_text(NEW_ALPHA_ONE)
     expect(row.locator(".kb-summary-edit")).to_be_visible()
 
     # The server row: the new text AND the manually_edited flag (the
@@ -754,7 +756,7 @@ def test_clear_folder_description(
     # The text is gone: the cell empties (the always-present Edit
     # button stays — a description can be re-created from the empty
     # cell).
-    expect(row.locator("td:nth-child(3) span")).to_have_text("")
+    expect(row.locator("td:nth-child(4) span")).to_have_text("")
     expect(row.locator(".kb-summary-edit")).to_be_visible()
 
     # The SQL assert: no row for the folder (the next KB-changing
@@ -787,7 +789,7 @@ def test_manual_description_survives_a_changed_sync(
     rows = page.locator("#folders-tbody tr")
     expect(rows).to_have_count(1)
     expect(rows.nth(0).locator("a.folder-link")).to_have_text("gamma")
-    expect(rows.nth(0).locator("td:nth-child(3) span")).to_have_text(GAMMA_SUM)
+    expect(rows.nth(0).locator("td:nth-child(4) span")).to_have_text(GAMMA_SUM)
 
     # The LEVEL-BLOCK Edit (the level surface — test 4 pins the row
     # surface): the static #kb-level-edit button, the source root
@@ -829,7 +831,7 @@ def test_manual_description_survives_a_changed_sync(
     expect(
         page.locator("#folders-tbody tr")
         .nth(0)
-        .locator("td:nth-child(3) span")
+        .locator("td:nth-child(4) span")
     ).to_have_text(GAMMA_SUM)
 
     # The new document landed in the tree: back to the top (the
@@ -840,7 +842,7 @@ def test_manual_description_survives_a_changed_sync(
     one_row = page.locator("#folders-tbody tr").nth(0)
     expect(one_row.locator("a.folder-link")).to_have_text("one")
     expect(one_row.locator("td:nth-child(2)")).to_have_text("3")
-    expect(one_row.locator("td:nth-child(3) span")).to_have_text(ONE_SUM)
+    expect(one_row.locator("td:nth-child(4) span")).to_have_text(ONE_SUM)
 
     # The SQL asserts: the manual row survived (text + flag), the
     # untouched rows were regenerated (the canned text, the flag back