fix(web): retire the stale homelab-era copy — neutral, accurate defaults on every page

Fixed: index.html meta description, empty-state sub and composer
placeholder (A1); app/config.py default suggestion chips → the four
neutral A2 defaults (BOR_SUGGESTIONS override unchanged); sources.html
KB page-sub → the current source model (git repos + local dirs +
uploaded archives, Sync pulls/imports); git-sources.html example URL
→ your-repo.git (A3); all 9 footers → neutral default in
span.footer-text (the phase-62 hook); E2E/unit conftests force the
code defaults so a local .env cannot leak corpus copy into tests;
new unit text pins + dedicated E2E suite.

Task 02 verification read-through — no change needed:
- sources.html sync result/error copy (matches the real sync behavior)
- tuning.html page-sub (accurate as written)
- history.html page-sub (accurate as written)
- doc-edit.html page-sub (accurate as written)
- git-sources.html page-sub (accurate as written)
- #sources-gate anonymous copy (accurate as written)

tests/unit/test_sync_button.py

@@ -102,13 +102,18 @@ def test_sync_error_banner_is_a_hidden_alert() -> None:
 
 
 def test_page_sub_copy_mentions_the_button() -> None:
-    """The page-sub copy names the button as the one-click way to clone
-    the repos and re-import (the import CLI docs live elsewhere)."""
+    """The page-sub copy names the button as the one-click way to pull
+    the latest and re-import (the import CLI docs live elsewhere).
+    Phase 61: the copy describes the current source model (git repos +
+    local directories + uploaded archives), not the old ~/Homelab +
+    ~/Deployments clone."""
     sub = re.search(r'<p class="page-sub">(.*?)</p>', _text(SOURCES_HTML), re.DOTALL)
     assert sub, "sources.html must keep the .page-sub copy"
     copy = re.sub(r"\s+", " ", sub.group(1))  # the markup wraps lines
     assert "Press <strong>Sync sources</strong>" in copy
-    assert "clone the repos and re-import" in copy
+    assert "pull the latest and re-import" in copy
+    assert "git repositories," in copy
+    assert "local directories, and uploaded archives" in copy
 
 
 def test_sources_page_stays_cdn_free() -> None: