copy: the product says "tags" now, and the schema keeps saying Label

Two words for one concept cost real comprehension: over a single exchange
the operator concluded that auto-tagging did not exist (it does, in
`derive.rs`) and that a tag-management view did not exist (it does,
`LabelsModal.vue`). The `#` is how most of these get made, so the `#` wins
the noun.

User-visible strings only, on all three surfaces plus the server's errors.
`Label`, `NoteLabel`, `via_tag`, `label_id`, the tables, `/api/labels` and
the FFI names are all untouched — renaming those touches migrations and the
wire format to buy nothing a reader can see.

Two of these were more than a find-and-replace:

  * Android's `label_from_tag` said "from #tag", sitting beside a chip that
    already renders as `#name`. Once every one of them IS a tag that hint is
    circular. What it actually tells you is that the note's BODY owns this
    one — which is why it alone has no remove cross — so it now says "from
    the text".

  * The web's empty state said "No labels yet — create one above" while
    Android's already mentioned the `#` route. The web now says it too. That
    is the exact fact the operator did not have.

The paired `aria-label`s went with their `title`s; a screen reader saying
"label" while the tooltip says "tag" is the same confusion with a smaller
audience.

Left alone deliberately: `json_error("invalid label")` and
`"label_ids must be a list"` in `notes/__init__.py` name the `?label=` query
parameter and the `label_ids` request field. Those are wire surface, not the
word a person reads.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01K3MMqUtzX1TJgA1oypvm1c

android/app/src/main/res/values/strings.xml

@@ -6,7 +6,7 @@
     <string name="search_hint">Search your notes</string>
     <string name="search_clear">Clear search</string>
     <string name="nav_open">Open navigation</string>
-    <string name="nav_labels">Labels</string>
+    <string name="nav_labels">Tags</string>
 
     <!-- Compose sheet -->
     <string name="compose_open">New note</string>
@@ -42,7 +42,7 @@
     <string name="editor_body_hint">Take a note…</string>
     <string name="editor_add_item">Add item</string>
     <string name="editor_remove_item">Remove item</string>
-    <string name="editor_remove_label">Remove label</string>
+    <string name="editor_remove_label">Remove tag</string>
     <string name="editor_reminder">Set a reminder</string>
     <string name="editor_more">More actions</string>
     <string name="editor_saving">Saving…</string>
@@ -52,7 +52,7 @@
     <string name="editor_done">Done</string>
     <string name="editor_pin">Pin</string>
     <string name="editor_unpin">Unpin</string>
-    <string name="editor_labels">Labels…</string>
+    <string name="editor_labels">Tags…</string>
     <string name="editor_archive">Archive</string>
     <string name="editor_unarchive">Unarchive</string>
     <string name="editor_trash">Move to trash</string>
@@ -67,10 +67,10 @@
     <string name="editor_delete_forever_confirm">Delete</string>
 
     <!-- Pickers -->
-    <string name="label_picker_title">Labels</string>
-    <string name="label_new_hint">Type a label and press enter</string>
-    <string name="label_from_tag">from #tag</string>
-    <string name="label_none_body">No labels yet. Type one above, or write a #tag in a note and it becomes one.</string>
+    <string name="label_picker_title">Tags</string>
+    <string name="label_new_hint">Type a tag and press enter</string>
+    <string name="label_from_tag">from the text</string>
+    <string name="label_none_body">No tags yet. Type one above, or write a #tag in a note and it becomes one.</string>
     <string name="picker_next">Next</string>
     <string name="picker_set">Set</string>
     <string name="picker_time_title">Pick a time</string>