feat: import leftover student fields into notes and show them on the roster

Store leftover CSV columns on hidden student notes, move catalog import to /events/import, and persist Students index columns from Chapter Settings.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/instructions/event-catalog-import.md

@@ -0,0 +1,23 @@
+# Import Event Catalog
+
+**Created:** 2026-08-29  
+**Last updated:** 2026-08-29  
+**Description:** How `/events/import` adds event definitions from CSV.
+
+## Where this is
+
+This is the **event catalog** (names, team size, format). It is not student event rankings (`/students/event-ranking/import`) and not the calendar schedule (`/calendar/event-occurrences/import`).
+
+## Steps
+
+1. Sign in as an Administrator.
+2. Open **Events** and click **Import**, or go to `/events/import`.
+3. Upload a CSV, **Parse**, review new vs existing counts, then **Save to Database**.
+
+Existing event names are skipped. Re-importing the same catalog is safe.
+
+## Required columns
+
+`Event`, `Team Size`, `State Count`
+
+Optional columns the parser already reads include `Short Name`, `EventFormat`, `Level of Effort`, `Eligibility`, `Description`, `Theme`, `Documentation`, `State Presubmission`, `Semifinalist Activity`, and `Regional Notes`.

docs/instructions/student-notes-import.md

@@ -0,0 +1,50 @@
+# Import Students and Note Fields
+
+**Created:** 2026-08-29  
+**Last updated:** 2026-08-29  
+
+**Description:** How `/students/import` creates students and merges leftover CSV columns into each student's markdown notes.
+
+## Where notes live
+
+Each student has a system note titled `#Student:{id}`. It is edited on the student edit page and shown on student details. Those notes are hidden from the main Notes list.
+
+Imported leftover values go in a table under `## Imported fields`. Other markdown above or below that heading is left alone.
+
+## CSV format
+
+```
+Student Name,Grade,TSA year,State ID,Regional ID,National ID,Interview Time,Application,Club Permission Slip,Teacher Rec 1,Teacher Rec 2,Teacher Rec 3
+"Last, First",6,1st,,,,3:20-3:35,x,x,Fuqua,Young,
+```
+
+- Roster (required): `Student Name` (`Last, First` or `First Last`), `Grade`, `TSA year`.
+- Roster (optional): `State ID`, `Regional ID`, `National ID`.
+- Every other column becomes a Field/Value row. Later files can add columns without a code change.
+- A cell that is only `x` / `X` is stored as `Yes`. Blank stays blank.
+- Rank columns `1`–`10`, `Officer`, and `TOTAL # OF EVENTS` are ignored (use `/students/event-ranking/import` for rankings).
+
+A notes-only file without `Grade` will not import. Put roster and leftover columns in the same CSV.
+
+## Merge rules
+
+- New students are inserted. Existing first+last name matches are skipped for the roster (add-only).
+- After students are saved, leftover columns are fuzzy-matched by name and merged into notes. Existing students still receive note updates.
+- Incoming values win when a field already exists, including a blank cell that clears a previous value.
+- New fields are appended. Fields not in this CSV stay. Blank cells are stored and re-imported as a no-op.
+- Duplicate rows for the same student collapse into one note match; the last row wins for overlapping field names.
+- Importing the same file twice adds no students and writes no note history.
+
+## Steps
+
+1. Sign in as an Administrator.
+2. Open **Students** and click **Import**, or go to `/students/import`.
+   The arrow next to **Import** downloads a CSV template (roster columns, Students index columns, and any other imported fields already in notes).
+   `/import` still opens this same student page.
+3. Upload the student CSV.
+4. Review new vs existing counts and leftover field names.
+5. **Save to Database**.
+
+## Index columns
+
+Chapter Settings → **Student Index Columns** lists which imported field names appear as extra columns on the Students index. The page also shows field names already present in student notes; click a chip to add or remove it from the list. Open Students again after saving; a restart is not required.

docs/instructions/year-rollover.md

@@ -1,7 +1,8 @@
 # Year Rollover Runbook
 
 **Created:** 2026-08-14  
-**Last updated:** 2026-08-28  
+**Last updated:** 2026-08-29  
+  
 **Description:** How to roll the chapter into a new competition year using the locked New Year wizard.
 
 ## Prerequisites
@@ -36,9 +37,10 @@
    - Type the target competition year exactly to enable **Apply rollover**.
    - Confirm the destructive dialog. The wizard creates `Data/backups/pre-rollover-yyyyMMdd-HHmmss.db` first; that file is the only undo.
 9. **Restart the application** so the home page and printouts show the new competition year.
-10. **Add new students** via `/students/create` or `/import`.
-    - `/import` is add-only and skips existing first+last name matches, so re-importing a full roster is safe for returners.
-11. **Import the new state schedule** from the calendar import page.
+10. **Add new students** via `/students/create` or `/students/import`.
+    - Student import is add-only for roster rows and skips existing first+last name matches, so re-importing a full roster is safe for returners.
+    - Leftover CSV columns (interview time, application, and so on) are merged into each student's notes. Rank columns stay on `/students/event-ranking/import`. See `docs/instructions/student-notes-import.md`.
+11. **Import the new state schedule** from the calendar import page. If the chapter event file changed, refresh the catalog at `/events/import` (add-only by event name).
 12. On **Meeting Schedule**, click **Reset** once. That page keeps team/student ids in browser localStorage; after a rollover those ids are stale.
 13. Collect new event rankings (CSV import at `/students/event-ranking/import`, or the ranking editor) and run team assignment as usual.
 
@@ -48,7 +50,7 @@
 |---------|------|
 | Non-returning students | Returning students (promoted) |
 | All teams | Event definitions (national catalog) |
-| All event rankings | Notes (including meeting notes by title) |
+| All event rankings | Notes (including meeting notes by title; notes for removed students are soft-deleted) |
 | All meeting history attendance snapshots | Database backup under `Data/backups/` |
 | Event occurrences (when checked) | |