feat: add CSV import for student event rankings

Let advisors load preference ranks from a converted CSV with fuzzy matching, known aliases, and a parse-preview-save page instead of relying on the ranking editor.

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

docs/instructions/event-ranking-import.md

@@ -0,0 +1,32 @@
+# Import Student Event Rankings
+
+**Created:** 2026-08-28  
+**Last updated:** 2026-08-28  
+**Description:** How to import student event preference rankings from a CSV.
+
+## CSV format
+
+```
+Student Name,1,2,3,4,5,6
+"Last, First",Video Game Design,Coding,Flight
+First Last,Video Game,Coding
+```
+
+- `Student Name` is required. `Last, First` and `First Last` both work.
+- Rank columns are `1` through `10`. Empty cells are skipped. Extra columns are ignored.
+- Event cells may be the official name, the catalog short name, or a close miss. Fuzzy matching scores both.
+- Known nicknames that fuzzy cannot reach are also accepted, including `Solar Racer`, `Challenging Tech`, `Digital Photo`, `Forensics`, `Micro Controller`, `Med Tech`, `Innovations & Inventions`, `Systems Control Tech`, `Structural Eng`, `Drone Challenge`, `Robotics`, and `Audio Podcast`.
+
+## Steps
+
+1. Sign in and open **Student Event Ranks** (`/students/event-ranking`).
+2. Click **Import**.
+3. Choose the CSV and click **Parse**.
+4. Review matched rows (raw text, chosen event, score) and any unmatched or ambiguous issues.
+5. Click **Save to Database**. If any matched student already has rankings, confirm the replace dialog.
+
+Save replaces rankings only for students who have at least one accepted rank in the file. Other students are unchanged.
+
+## What is not imported
+
+Unmatched students, unmatched events, and ambiguous event names are reported in the preview and are not saved. Fix the CSV text or add the student/event in the app, then parse again.

docs/instructions/year-rollover.md

@@ -1,7 +1,7 @@
 # Year Rollover Runbook
 
 **Created:** 2026-08-14  
-**Last updated:** 2026-08-14  
+**Last updated:** 2026-08-28  
 **Description:** How to roll the chapter into a new competition year using the locked New Year wizard.
 
 ## Prerequisites
@@ -40,7 +40,7 @@
     - `/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.
 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 and run team assignment as usual.
+13. Collect new event rankings (CSV import at `/students/event-ranking/import`, or the ranking editor) and run team assignment as usual.
 
 ## What is deleted vs kept