feat: jury composition + banner image upload

- migration 004: thesis_supervisors.role + is_external; view adds jury_president/jury_promoteurs/jury_lecteurs
- migration 005: theses.banner_path; view exposes t.banner_path and t.license_id
- Database: getThesisJury(), setThesisJury(), setBannerPath()
- admin/add.php: jury fieldset (président/promoteur/lecteurs + externe checkboxes, JS add/remove rows); banner file input
- admin/edit.php: jury fieldset pre-populated from DB; banner preview + remove checkbox + upload; multipart form
- admin/actions/formulaire.php: parse jury fields → setThesisJury(); banner upload to banners/
- tfe.php: three conditional jury rows (président·e, promoteur·ice, lecteur·ices)
- schema.sql: updated thesis_supervisors, theses, v_theses_full, v_theses_public definitions
- admin.css: fieldset, jury-row, jury-entry, btn-remove styles

storage/schema.sql

@@ -191,6 +191,9 @@ CREATE TABLE IF NOT EXISTS theses (
     -- External links
     baiu_link TEXT, -- Link to institutional repository
 
+    -- Home page card banner (optional, landscape image)
+    banner_path TEXT, -- path relative to STORAGE_ROOT (e.g. "banners/abc.jpg")
+
     -- Timestamps
     created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
     updated_at DATETIME DEFAULT CURRENT_TIMESTAMP,
@@ -217,11 +220,13 @@ CREATE TABLE IF NOT EXISTS thesis_authors (
     FOREIGN KEY (author_id) REFERENCES authors(id) ON DELETE CASCADE
 );
 
--- Supervisors per thesis (can have multiple promoters)
+-- Supervisors per thesis (jury: president, promoteur, lecteurs)
 CREATE TABLE IF NOT EXISTS thesis_supervisors (
     thesis_id INTEGER NOT NULL,
     supervisor_id INTEGER NOT NULL,
     supervisor_order INTEGER DEFAULT 1,
+    role TEXT NOT NULL DEFAULT 'promoteur',   -- 'president'|'promoteur'|'lecteur'
+    is_external INTEGER NOT NULL DEFAULT 0,   -- 0 = internal, 1 = external
     PRIMARY KEY (thesis_id, supervisor_id),
     FOREIGN KEY (thesis_id) REFERENCES theses(id) ON DELETE CASCADE,
     FOREIGN KEY (supervisor_id) REFERENCES supervisors(id) ON DELETE CASCADE
@@ -360,14 +365,19 @@ SELECT
     t.file_size_info,
     at.name as access_type,
     lt.name as license_type,
+    t.license_id,
     t.jury_points,
     t.submitted_at,
     t.defense_date,
     t.published_at,
     t.is_published,
     t.baiu_link,
+    t.banner_path,
     GROUP_CONCAT(DISTINCT a.name) as authors,
     GROUP_CONCAT(DISTINCT s.name) as supervisors,
+    GROUP_CONCAT(DISTINCT CASE WHEN ts.role = 'president' THEN s.name END) as jury_president,
+    GROUP_CONCAT(DISTINCT CASE WHEN ts.role = 'promoteur' THEN s.name END) as jury_promoteurs,
+    GROUP_CONCAT(DISTINCT CASE WHEN ts.role = 'lecteur'   THEN s.name END) as jury_lecteurs,
     GROUP_CONCAT(DISTINCT l.name) as languages,
     GROUP_CONCAT(DISTINCT fmt.name) as formats,
     GROUP_CONCAT(DISTINCT k.keyword) as keywords